ЗАФИКСИРОВАЛ

BusinessLogic/BusinessLogic/SellLogic.cs

@@ -31,7 +31,8 @@ namespace BusinessLogic.BusinessLogic
             {
                 throw new Exception("Insert operation failed.");
             }
-            return sell;
+            //return sell;
+            return new();
         }      
         public SellViewModel GetElement(SellSearchModel model)
         {
@@ -41,17 +42,19 @@ namespace BusinessLogic.BusinessLogic
             {
                 throw new Exception("Get element operation failed.");
             }
-            return sell;
+            return new();
+            //return sell;
         }
         public IEnumerable<SellViewModel> GetElements(SellSearchModel? model)
         {
-            var sell_list = model == null ? _sellStorage.GetFullList(model) : _sellStorage.GetFilteredList(model);
-            if (sell_list is null || sell_list.Count() == 0)
-            {
-                _logger.LogWarning("ReadList return null list");
-                return [];
-            }
-            return sell_list;
+            //var sell_list = _sellStorage.GetList(model);
+            //if (sell_list is null || sell_list.Count() == 0)
+            //{
+            //    _logger.LogWarning("ReadList return null list");
+            //    return [];
+            //}
+            return [];
+            //return sell_list;
         }
         public SellViewModel Update(SellSearchModel model)
         {
@@ -61,7 +64,8 @@ namespace BusinessLogic.BusinessLogic
             {
                 throw new Exception("Update operation failed.");
             }
-            return sell;
+            return new();
+            //return sell;
         }
         public SellViewModel Delete(SellSearchModel model)
         {
@@ -71,7 +75,8 @@ namespace BusinessLogic.BusinessLogic
             {
                 throw new Exception("Update operation failed.");
             }
-            return sell;
+            return new();
+            //return sell;
         }
     }
 }

BusinessLogic/BusinessLogic/SupplyLogic.cs

@@ -3,6 +3,7 @@ using Contracts.BusinessLogicContracts;
 using Contracts.SearchModels;
 using Contracts.StorageContracts;
 using Contracts.ViewModels;
+using DataModels.Enums;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
@@ -101,5 +102,22 @@ namespace BusinessLogic.BusinessLogic
                 throw new ArgumentNullException("Нет названия поставки", nameof(model.Name));
             }
         }
+
+        public bool StatusUpdate(SupplyBindingModel model, SupplyStatus newStatus)
+        {
+            if (model.Status + 1 != newStatus)
+            {
+                _logger.LogWarning("Status update to " + newStatus.ToString() + " operation failed. Supply status incorrect.");
+                return false;
+            }
+            model.Status = newStatus;
+            if (_supplyStorage.Update(model) == null)
+            {
+                model.Status--;
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
     }
 }

Contracts/BusinessLogicContracts/ISupplyLogic.cs

@@ -1,6 +1,7 @@
 using Contracts.BindingModels;
 using Contracts.SearchModels;
 using Contracts.ViewModels;
+using DataModels.Enums;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -16,5 +17,6 @@ namespace Contracts.BusinessLogicContracts
         bool Create(SupplyBindingModel model);
         bool Update(SupplyBindingModel model);
         bool Delete(SupplyBindingModel model);
+        bool StatusUpdate(SupplyBindingModel model, SupplyStatus status);
     }
 }

Contracts/StorageContracts/ISupplyStorage.cs

@@ -14,8 +14,8 @@ namespace Contracts.StorageContracts
         List<SupplyViewModel> GetFullList();
         List<SupplyViewModel> GetFilteredList(SupplySearchModel model);
         SupplyViewModel? GetElement(SupplySearchModel model);
-        SupplyViewModel? Insert(SupplyBindingModel model);
-        SupplyViewModel? Update(SupplyBindingModel model);
+        bool? Insert(SupplyBindingModel model);
+        bool? Update(SupplyBindingModel model);
         SupplyViewModel? Delete(SupplyBindingModel model);
     }
 }

DatabaseImplement/Implements/SupplyStorage.cs

@@ -7,6 +7,7 @@ using Microsoft.EntityFrameworkCore;
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -106,7 +107,7 @@ namespace DatabaseImplement.Implements
             .ToList();
         }
 
-        public SupplyViewModel? Insert(SupplyBindingModel model)
+        public bool? Insert(SupplyBindingModel model)
         {
             using var context = new Database();
             var newProduct = Supply.Create(context, model);
@@ -115,11 +116,18 @@ namespace DatabaseImplement.Implements
                 return null;
             }
             context.Supplies.Add(newProduct);
-            context.SaveChanges();
-            return newProduct.GetViewModel;
+            try
+            {
+                context.SaveChanges();
+            }
+            catch (Exception ex) 
+            {
+                Debug.WriteLine(ex);
+            }
+            return true;
         }
 
-        public SupplyViewModel? Update(SupplyBindingModel model)
+        public bool? Update(SupplyBindingModel model)
         {
             using var context = new Database();
             using var transaction = context.Database.BeginTransaction();
@@ -129,13 +137,12 @@ namespace DatabaseImplement.Implements
                 rec.Id == model.Id);
                 if (product == null)
                 {
-                    return null;
+                    return false;
                 }
                 product.Update(model);
                 context.SaveChanges();
-                product.UpdateProducts(context, model);
                 transaction.Commit();
-                return product.GetViewModel;
+                return true;
             }
             catch
             {

DatabaseImplement/Models/Product.cs

@@ -43,7 +43,7 @@ namespace DatabaseImplement.Models
 			Id = model.Id,
 			Name = model.Name,
 			Price = model.Price,
-			Rate = model.Rating,
+			Rate = model.Rate,
 			IsBeingSold = model.IsBeingSold,
 			Amount = model.Amount
 		};
@@ -96,7 +96,7 @@ namespace DatabaseImplement.Models
                     Name = Name,
                     Price = Price,
                     IsBeingSold = IsBeingSold,
-                    Rating = Rate,
+                    Rate = Rate,
 					Amount = Amount
                 };
             }

DatabaseImplement/Models/Supplier.cs

@@ -59,7 +59,7 @@ namespace DatabaseImplement.Models
             Deals = model.Deals;
             Debug.WriteLine(model.AvailibleProducts.Keys);
             Products = model.AvailibleProducts.Select(x => new
-                SupplierProduct
+            SupplierProduct
             {
                 Product = context.Products.First(y => y.Id == x.Value.Item1.Id),
                 Count = x.Value.Item2
@@ -81,6 +81,7 @@ namespace DatabaseImplement.Models
         }
         public void UpdateProducts(Database context, SupplierBindingModel model)
         {
+            var test = context.SupplierProducts.ToList();
             var supplierProducts = context.SupplierProducts.Where(rec => rec.SupplierId == model.Id).ToList();
             if (supplierProducts != null && supplierProducts.Count > model.AvailibleProducts.Count)
             {

DatabaseImplement/Models/Supply.cs

@@ -59,13 +59,13 @@ namespace DatabaseImplement.Models
                 {
                     Product = context.Products.First(y => y.Id == x.Key),
                     Count = x.Value.Item2
-                }).ToList()
+                }).ToList(),
+                Status = SupplyStatus.Pending,
             };
         }
         public void Update(SupplyBindingModel model)
         {
-            Name = model.Name;
-            Price = model.Price;
+            Status = model.Status;
         }
         public SupplyViewModel GetViewModel
         {
@@ -78,41 +78,12 @@ namespace DatabaseImplement.Models
                     Name = Name,
                     Price = Price,
                     Products = SupplyProducts,
+                    SupplierId = SupplierId,
                     Date = Date,
                     Status = Status,
-                    SupplierName = context.Suppliers.FirstOrDefault(x => x.Id == Id)?.Name ?? string.Empty,
+                    SupplierName = Supplier.Name,
                 };
             }
         }
-        public void UpdateProducts(Database context, SupplyBindingModel model)
-        {
-            var supplyProducts = context.SupplyProducts.Where(rec =>
-            rec.Id == model.Id).ToList();
-            if (supplyProducts != null && supplyProducts.Count > 0)
-            { // удалили те, которых нет в модели
-                context.SupplyProducts.RemoveRange(supplyProducts.Where(rec
-                => !model.SupplyProducts.ContainsKey(rec.ProductId)));
-                context.SaveChanges();
-                // обновили количество у существующих записей
-                foreach (var updateProduct in supplyProducts)
-                {
-                    updateProduct.Count = model.SupplyProducts[updateProduct.ProductId].Item2;
-                    model.SupplyProducts.Remove(updateProduct.ProductId);
-                }
-                context.SaveChanges();
-            }
-            var supply = context.Supplies.First(x => x.Id == Id);
-            foreach (var pc in model.SupplyProducts)
-            {
-                context.SupplyProducts.Add(new SupplyProduct
-                {
-                    Supply = supply,
-                    Product = context.Products.First(x => x.Id == pc.Key),
-                    Count = pc.Value.Item2
-                });
-                context.SaveChanges();
-            }
-            _supplyProducts = null;
-        }
     }
 }

WinFormsApp/FormMain.Designer.cs

@@ -33,6 +33,8 @@
             menuStrip1 = new MenuStrip();
             товарыToolStripMenuItem = new ToolStripMenuItem();
             поставщикиToolStripMenuItem = new ToolStripMenuItem();
+            buttonSupplyStatusArriving = new Button();
+            buttonSupplyStatusCompleted = new Button();
             ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
             menuStrip1.SuspendLayout();
             SuspendLayout();
@@ -48,12 +50,13 @@
             // 
             // buttonCreateSupply
             // 
-            buttonCreateSupply.Location = new Point(706, 12);
+            buttonCreateSupply.Location = new Point(707, 27);
             buttonCreateSupply.Name = "buttonCreateSupply";
             buttonCreateSupply.Size = new Size(154, 23);
             buttonCreateSupply.TabIndex = 1;
             buttonCreateSupply.Text = "Оформить поставку";
             buttonCreateSupply.UseVisualStyleBackColor = true;
+            buttonCreateSupply.Click += buttonCreateSupply_Click;
             // 
             // menuStrip1
             // 
@@ -78,11 +81,33 @@
             поставщикиToolStripMenuItem.Text = "Поставщики";
             поставщикиToolStripMenuItem.Click += поставщикиToolStripMenuItem_Click_1;
             // 
+            // buttonSupplyStatusArriving
+            // 
+            buttonSupplyStatusArriving.Location = new Point(707, 76);
+            buttonSupplyStatusArriving.Name = "buttonSupplyStatusArriving";
+            buttonSupplyStatusArriving.Size = new Size(154, 23);
+            buttonSupplyStatusArriving.TabIndex = 3;
+            buttonSupplyStatusArriving.Text = "Поставка в пути";
+            buttonSupplyStatusArriving.UseVisualStyleBackColor = true;
+            buttonSupplyStatusArriving.Click += buttonSupplyStatusArriving_Click;
+            // 
+            // buttonSupplyStatusCompleted
+            // 
+            buttonSupplyStatusCompleted.Location = new Point(707, 125);
+            buttonSupplyStatusCompleted.Name = "buttonSupplyStatusCompleted";
+            buttonSupplyStatusCompleted.Size = new Size(154, 23);
+            buttonSupplyStatusCompleted.TabIndex = 4;
+            buttonSupplyStatusCompleted.Text = "Поставка завершена";
+            buttonSupplyStatusCompleted.UseVisualStyleBackColor = true;
+            buttonSupplyStatusCompleted.Click += buttonSupplyStatusCompleted_Click;
+            // 
             // FormMain
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(901, 384);
+            Controls.Add(buttonSupplyStatusCompleted);
+            Controls.Add(buttonSupplyStatusArriving);
             Controls.Add(buttonCreateSupply);
             Controls.Add(dataGridView);
             Controls.Add(menuStrip1);
@@ -104,5 +129,7 @@
         private MenuStrip menuStrip1;
         private ToolStripMenuItem товарыToolStripMenuItem;
         private ToolStripMenuItem поставщикиToolStripMenuItem;
+        private Button buttonSupplyStatusArriving;
+        private Button buttonSupplyStatusCompleted;
     }
 }

WinFormsApp/FormMain.cs

@@ -1,4 +1,7 @@
-using Contracts.BusinessLogicContracts;
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using DataModels.Enums;
+using DataModels.Models;
 using Microsoft.EntityFrameworkCore.Diagnostics;
 using Microsoft.Extensions.Logging;
 using System;
@@ -68,5 +71,70 @@ namespace WinFormsApp
                 form.ShowDialog();
             }
         }
+
+        private void buttonCreateSupply_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormSupply));
+            if (service is FormSupply form)
+            {
+                form.ShowDialog();
+            }
+        }
+
+        private void buttonSupplyStatusArriving_Click(object sender, EventArgs e)
+        {
+            if (dataGridView.SelectedRows.Count == 1)
+            {
+                Guid id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
+                _logger.LogInformation("Поставка No{id}. Меняется статус", id);
+                try
+                {
+                    var operationResult = _supplyLogic.StatusUpdate(new SupplyBindingModel
+                    {
+                        Id = id,
+                        Status = (SupplyStatus)dataGridView.SelectedRows[0].Cells["Status"].Value
+                    }, SupplyStatus.Arriving);
+                    if (!operationResult)
+                    {
+                        throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
+                    }
+                    LoadData();
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Ошибка передачи заказа в работу");
+                    MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
+                    MessageBoxIcon.Error);
+                }
+            }
+        }
+
+        private void buttonSupplyStatusCompleted_Click(object sender, EventArgs e)
+        {
+            if (dataGridView.SelectedRows.Count == 1)
+            {
+                Guid id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
+                _logger.LogInformation("Поставка No{id}. Меняется статус", id);
+                try
+                {
+                    var operationResult = _supplyLogic.StatusUpdate(new SupplyBindingModel
+                    {
+                        Id = id,
+                        Status = (SupplyStatus)dataGridView.SelectedRows[0].Cells["Status"].Value
+                    }, SupplyStatus.Completed);
+                    if (!operationResult)
+                    {
+                        throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
+                    }
+                    LoadData();
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Ошибка передачи заказа в работу");
+                    MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
+                    MessageBoxIcon.Error);
+                }
+            }
+        }
     }
 }

WinFormsApp/FormSupplier.Designer.cs

@@ -0,0 +1,209 @@
+namespace WinFormsApp
+{
+    partial class FormSupplier
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            buttonCancel = new Button();
+            buttonSave = new Button();
+            label1 = new Label();
+            groupBoxProducts = new GroupBox();
+            buttonDeleteProduct = new Button();
+            buttonUpdateProduct = new Button();
+            buttonAddProduct = new Button();
+            dataGridView = new DataGridView();
+            ProductId = new DataGridViewTextBoxColumn();
+            ProductName = new DataGridViewTextBoxColumn();
+            ProductAmount = new DataGridViewTextBoxColumn();
+            textBoxName = new TextBox();
+            numericUpDownDeals = new NumericUpDown();
+            label2 = new Label();
+            groupBoxProducts.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).BeginInit();
+            SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(307, 83);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(75, 23);
+            buttonCancel.TabIndex = 12;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Location = new Point(307, 35);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(75, 23);
+            buttonSave.TabIndex = 11;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += buttonSave_Click;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Location = new Point(18, 18);
+            label1.Name = "label1";
+            label1.Size = new Size(215, 15);
+            label1.TabIndex = 10;
+            label1.Text = "Имя/название компании поставщика";
+            // 
+            // groupBoxProducts
+            // 
+            groupBoxProducts.Controls.Add(buttonDeleteProduct);
+            groupBoxProducts.Controls.Add(buttonUpdateProduct);
+            groupBoxProducts.Controls.Add(buttonAddProduct);
+            groupBoxProducts.Controls.Add(dataGridView);
+            groupBoxProducts.Location = new Point(12, 145);
+            groupBoxProducts.Name = "groupBoxProducts";
+            groupBoxProducts.Size = new Size(776, 288);
+            groupBoxProducts.TabIndex = 9;
+            groupBoxProducts.TabStop = false;
+            groupBoxProducts.Text = "Товары";
+            // 
+            // buttonDeleteProduct
+            // 
+            buttonDeleteProduct.Location = new Point(435, 132);
+            buttonDeleteProduct.Name = "buttonDeleteProduct";
+            buttonDeleteProduct.Size = new Size(126, 49);
+            buttonDeleteProduct.TabIndex = 4;
+            buttonDeleteProduct.Text = "Удалить";
+            buttonDeleteProduct.UseVisualStyleBackColor = true;
+            // 
+            // buttonUpdateProduct
+            // 
+            buttonUpdateProduct.Location = new Point(435, 77);
+            buttonUpdateProduct.Name = "buttonUpdateProduct";
+            buttonUpdateProduct.Size = new Size(126, 49);
+            buttonUpdateProduct.TabIndex = 3;
+            buttonUpdateProduct.Text = "Изменить";
+            buttonUpdateProduct.UseVisualStyleBackColor = true;
+            // 
+            // buttonAddProduct
+            // 
+            buttonAddProduct.Location = new Point(435, 22);
+            buttonAddProduct.Name = "buttonAddProduct";
+            buttonAddProduct.Size = new Size(126, 49);
+            buttonAddProduct.TabIndex = 2;
+            buttonAddProduct.Text = "Добавить";
+            buttonAddProduct.UseVisualStyleBackColor = true;
+            buttonAddProduct.Click += buttonAddProduct_Click;
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Columns.AddRange(new DataGridViewColumn[] { ProductId, ProductName, ProductAmount });
+            dataGridView.Location = new Point(6, 22);
+            dataGridView.Name = "dataGridView";
+            dataGridView.Size = new Size(423, 241);
+            dataGridView.TabIndex = 1;
+            // 
+            // ProductId
+            // 
+            ProductId.HeaderText = "Id";
+            ProductId.Name = "ProductId";
+            ProductId.ReadOnly = true;
+            ProductId.Visible = false;
+            // 
+            // ProductName
+            // 
+            ProductName.HeaderText = "Название";
+            ProductName.Name = "ProductName";
+            ProductName.ReadOnly = true;
+            // 
+            // ProductAmount
+            // 
+            ProductAmount.HeaderText = "Количество";
+            ProductAmount.Name = "ProductAmount";
+            ProductAmount.ReadOnly = true;
+            // 
+            // textBoxName
+            // 
+            textBoxName.Location = new Point(18, 36);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(215, 23);
+            textBoxName.TabIndex = 8;
+            // 
+            // numericUpDownDeals
+            // 
+            numericUpDownDeals.Location = new Point(18, 85);
+            numericUpDownDeals.Name = "numericUpDownDeals";
+            numericUpDownDeals.Size = new Size(120, 23);
+            numericUpDownDeals.TabIndex = 13;
+            // 
+            // label2
+            // 
+            label2.AutoSize = true;
+            label2.Location = new Point(18, 67);
+            label2.Name = "label2";
+            label2.Size = new Size(87, 15);
+            label2.TabIndex = 14;
+            label2.Text = "Кол-во сделок";
+            // 
+            // FormSupplier
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(label2);
+            Controls.Add(numericUpDownDeals);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(label1);
+            Controls.Add(groupBoxProducts);
+            Controls.Add(textBoxName);
+            Name = "FormSupplier";
+            Text = "FormSupplier";
+            Load += FormSupplier_Load;
+            groupBoxProducts.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Button buttonCancel;
+        private Button buttonSave;
+        private Label label1;
+        private GroupBox groupBoxProducts;
+        private Button buttonDeleteProduct;
+        private Button buttonUpdateProduct;
+        private Button buttonAddProduct;
+        private DataGridView dataGridView;
+        private DataGridViewTextBoxColumn ProductId;
+        private DataGridViewTextBoxColumn ProductName;
+        private DataGridViewTextBoxColumn ProductAmount;
+        private TextBox textBoxName;
+        private NumericUpDown numericUpDownDeals;
+        private Label label2;
+    }
+}

WinFormsApp/FormSupplier.cs

@@ -0,0 +1,143 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using DatabaseImplement.Models;
+using DataModels.Models;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace WinFormsApp
+{
+    public partial class FormSupplier : Form
+    {
+        private readonly ILogger _logger;
+        private readonly ISupplierLogic _logic;
+        private Guid? _id;
+        private Dictionary<Guid, (IProduct, int)> _supplierProducts;
+        public Guid Id { set { _id = value; } }
+        public FormSupplier(ILogger<FormSupply> logger, ISupplierLogic supplierLogic)
+        {
+            InitializeComponent();
+            _logger = logger;
+            _supplierProducts = new Dictionary<Guid, (IProduct, int)>();
+            _logic = supplierLogic;
+        }
+        private void FormSupplier_Load(object sender, EventArgs e)
+        {
+            if (_id.HasValue)
+            {
+                _logger.LogInformation("Загрузка изделия");
+                try
+                {
+                    var view = _logic.ReadElement(new SupplierSearchModel
+                    {
+                        Id = _id.Value
+                    });
+                    if (view != null)
+                    {
+                        textBoxName.Text = view.Name;
+                        _supplierProducts = view.AvailibleProducts ?? new Dictionary<Guid, (IProduct, int)>();
+                        LoadData();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Ошибка загрузки изделия");
+                    MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }
+            }
+        }
+
+        private void LoadData()
+        {
+            _logger.LogInformation("Загрузка компонент изделия");
+            try
+            {
+                if (_supplierProducts != null)
+                {
+                    dataGridView.Rows.Clear();
+                    foreach (var pc in _supplierProducts)
+                    {
+                        dataGridView.Rows.Add(new object[] { pc.Key, pc.Value.Item1.Name, pc.Value.Item2 });
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка загрузки компонент изделия");
+                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
+               MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonAddProduct_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormSupplierProduct));
+            if (service is FormSupplierProduct form)
+            {
+                if (form.ShowDialog() == DialogResult.OK)
+                {
+                    if (form.ProductModel == null)
+                    {
+                        return;
+                    }
+                    _logger.LogInformation("Добавление нового компонента");
+                    if (_supplierProducts.ContainsKey(form.Id))
+                    {
+                        _supplierProducts[form.Id] = (form.ProductModel, form.Count);
+                    }
+                    else
+                    {
+                        _supplierProducts.Add(form.Id, (form.ProductModel, form.Count));
+                    }
+                    LoadData();
+                }
+            }
+        }
+
+        private void buttonSave_Click(object sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(textBoxName.Text))
+            {
+                MessageBox.Show("Заполните информацию", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (_supplierProducts == null || _supplierProducts.Count == 0)
+            {
+                MessageBox.Show("Заполните товары", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            _logger.LogInformation("Сохранение изделия");
+            try
+            {
+                var model = new SupplierBindingModel
+                {
+                    Id = _id ?? Guid.NewGuid(),
+                    Name = textBoxName.Text,
+                    AvailibleProducts = _supplierProducts,
+                    Deals = Convert.ToInt32(numericUpDownDeals.Value),
+                };
+                var operationResult = _id.HasValue ? _logic.Update(model) : _logic.Create(model);
+                if (!operationResult)
+                {
+                    throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
+                }
+                MessageBox.Show("Сохранение прошло успешно", "Сообщение", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                DialogResult = DialogResult.OK;
+                Close();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка сохранения изделия"); MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+    }
+}

WinFormsApp/FormSupplier.resx

@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="ProductId.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductName.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductAmount.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+</root>

WinFormsApp/FormSupplierProduct.Designer.cs

@@ -0,0 +1,95 @@
+namespace WinFormsApp
+{
+    partial class FormSupplierProduct
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            buttonCancel = new Button();
+            buttonSave = new Button();
+            comboBoxProduct = new ComboBox();
+            numericUpDownCount = new NumericUpDown();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).BeginInit();
+            SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(179, 77);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(75, 23);
+            buttonCancel.TabIndex = 8;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Location = new Point(179, 53);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(75, 23);
+            buttonSave.TabIndex = 7;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // comboBoxProduct
+            // 
+            comboBoxProduct.FormattingEnabled = true;
+            comboBoxProduct.Location = new Point(12, 12);
+            comboBoxProduct.Name = "comboBoxProduct";
+            comboBoxProduct.Size = new Size(121, 23);
+            comboBoxProduct.TabIndex = 6;
+            // 
+            // numericUpDownCount
+            // 
+            numericUpDownCount.Location = new Point(13, 55);
+            numericUpDownCount.Name = "numericUpDownCount";
+            numericUpDownCount.Size = new Size(120, 23);
+            numericUpDownCount.TabIndex = 5;
+            // 
+            // FormSupplierProduct
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(291, 123);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(comboBoxProduct);
+            Controls.Add(numericUpDownCount);
+            Name = "FormSupplierProduct";
+            Text = "FormSupplierProduct";
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Button buttonCancel;
+        private Button buttonSave;
+        private ComboBox comboBoxProduct;
+        private NumericUpDown numericUpDownCount;
+    }
+}

WinFormsApp/FormSupplierProduct.cs

@@ -0,0 +1,88 @@
+using Contracts.BusinessLogicContracts;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace WinFormsApp
+{
+    public partial class FormSupplierProduct : Form
+    {
+        private readonly List<ProductViewModel>? _list;
+        public Guid Id
+        {
+            get
+            {
+                return (Guid)comboBoxProduct.SelectedValue;
+            }
+            set
+            {
+                comboBoxProduct.SelectedValue = value;
+            }
+        }
+
+        public IProduct? ProductModel
+        {
+            get
+            {
+                if (_list == null)
+                {
+                    return null;
+                }
+                foreach (var elem in _list)
+                {
+                    if (elem.Id == Id)
+                    {
+                        return elem;
+                    }
+                }
+                return null;
+            }
+        }
+
+        public int Count
+        {
+            get { return Convert.ToInt32(numericUpDownCount.Value); }
+            set { numericUpDownCount.Value = value; }
+        }
+        public FormSupplierProduct(IProductLogic logic)
+        {
+            InitializeComponent();
+            _list = logic.ReadList(null);
+            if (_list != null)
+            {
+                comboBoxProduct.DisplayMember = "Name";
+                comboBoxProduct.ValueMember = "Id";
+                comboBoxProduct.DataSource = _list;
+                comboBoxProduct.SelectedItem = null;
+            }
+        }
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            if (numericUpDownCount.Value == null || numericUpDownCount.Value <= 0)
+            {
+                MessageBox.Show("Кол-во товаров должно иметь значение больше 0", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (comboBoxProduct.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите товар", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            DialogResult = DialogResult.OK;
+            Close();
+        }
+        private void ButtonCancel_Click(object sender, EventArgs e)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
+        }
+    }
+}

WinFormsApp/FormSupplierProduct.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

WinFormsApp/FormSuppliers.Designer.cs

@@ -28,308 +28,59 @@
         /// </summary>
         private void InitializeComponent()
         {
-            groupBoxCreateSupplier = new GroupBox();
-            label4 = new Label();
-            label3 = new Label();
-            numericUpDownDeals = new NumericUpDown();
-            groupBoxSupplierProducts = new GroupBox();
-            buttonDeleteProduct = new Button();
-            label2 = new Label();
-            buttonCancel = new Button();
-            label1 = new Label();
-            buttonSaveSupplier = new Button();
-            numericUpDownCount = new NumericUpDown();
-            comboBoxProducts = new ComboBox();
-            dataGridViewProducts = new DataGridView();
-            buttonAddSupplierProduct = new Button();
-            textBoxName = new TextBox();
-            groupBoxControls = new GroupBox();
-            buttonDeleteSupplier = new Button();
-            buttonUpdateSupplier = new Button();
-            buttonCreateSupplier = new Button();
             dataGridView = new DataGridView();
-            ColumnId = new DataGridViewTextBoxColumn();
-            Column = new DataGridViewTextBoxColumn();
-            Column2 = new DataGridViewTextBoxColumn();
-            groupBoxCreateSupplier.SuspendLayout();
-            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).BeginInit();
-            groupBoxSupplierProducts.SuspendLayout();
-            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)dataGridViewProducts).BeginInit();
-            groupBoxControls.SuspendLayout();
+            buttonAdd = new Button();
+            buttonEdit = new Button();
             ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
             SuspendLayout();
             // 
-            // groupBoxCreateSupplier
-            // 
-            groupBoxCreateSupplier.BackColor = Color.Transparent;
-            groupBoxCreateSupplier.Controls.Add(label4);
-            groupBoxCreateSupplier.Controls.Add(label3);
-            groupBoxCreateSupplier.Controls.Add(numericUpDownDeals);
-            groupBoxCreateSupplier.Controls.Add(groupBoxSupplierProducts);
-            groupBoxCreateSupplier.Controls.Add(textBoxName);
-            groupBoxCreateSupplier.Dock = DockStyle.Right;
-            groupBoxCreateSupplier.Location = new Point(288, 0);
-            groupBoxCreateSupplier.Name = "groupBoxCreateSupplier";
-            groupBoxCreateSupplier.Size = new Size(367, 637);
-            groupBoxCreateSupplier.TabIndex = 6;
-            groupBoxCreateSupplier.TabStop = false;
-            groupBoxCreateSupplier.Text = "Создание/изменение поставщика";
-            // 
-            // label4
-            // 
-            label4.AutoSize = true;
-            label4.Location = new Point(17, 93);
-            label4.Name = "label4";
-            label4.Size = new Size(87, 15);
-            label4.TabIndex = 15;
-            label4.Text = "Кол-во сделок";
-            // 
-            // label3
-            // 
-            label3.AutoSize = true;
-            label3.Location = new Point(6, 54);
-            label3.Name = "label3";
-            label3.Size = new Size(101, 15);
-            label3.TabIndex = 14;
-            label3.Text = "Имя поставщика";
-            // 
-            // numericUpDownDeals
-            // 
-            numericUpDownDeals.Location = new Point(110, 91);
-            numericUpDownDeals.Maximum = new decimal(new int[] { 100000, 0, 0, 0 });
-            numericUpDownDeals.Name = "numericUpDownDeals";
-            numericUpDownDeals.Size = new Size(245, 23);
-            numericUpDownDeals.TabIndex = 14;
-            // 
-            // groupBoxSupplierProducts
-            // 
-            groupBoxSupplierProducts.Controls.Add(buttonDeleteProduct);
-            groupBoxSupplierProducts.Controls.Add(label2);
-            groupBoxSupplierProducts.Controls.Add(buttonCancel);
-            groupBoxSupplierProducts.Controls.Add(label1);
-            groupBoxSupplierProducts.Controls.Add(buttonSaveSupplier);
-            groupBoxSupplierProducts.Controls.Add(numericUpDownCount);
-            groupBoxSupplierProducts.Controls.Add(comboBoxProducts);
-            groupBoxSupplierProducts.Controls.Add(dataGridViewProducts);
-            groupBoxSupplierProducts.Controls.Add(buttonAddSupplierProduct);
-            groupBoxSupplierProducts.Location = new Point(0, 149);
-            groupBoxSupplierProducts.Name = "groupBoxSupplierProducts";
-            groupBoxSupplierProducts.Size = new Size(361, 482);
-            groupBoxSupplierProducts.TabIndex = 10;
-            groupBoxSupplierProducts.TabStop = false;
-            groupBoxSupplierProducts.Text = "Доступные товары поставщика";
-            // 
-            // buttonDeleteProduct
-            // 
-            buttonDeleteProduct.Location = new Point(58, 307);
-            buttonDeleteProduct.Name = "buttonDeleteProduct";
-            buttonDeleteProduct.Size = new Size(81, 23);
-            buttonDeleteProduct.TabIndex = 15;
-            buttonDeleteProduct.Text = "Удалить";
-            buttonDeleteProduct.UseVisualStyleBackColor = true;
-            buttonDeleteProduct.Click += buttonDeleteProduct_Click;
-            // 
-            // label2
-            // 
-            label2.AutoSize = true;
-            label2.Location = new Point(6, 251);
-            label2.Name = "label2";
-            label2.Size = new Size(46, 15);
-            label2.TabIndex = 13;
-            label2.Text = "Кол-во";
-            // 
-            // buttonCancel
-            // 
-            buttonCancel.Location = new Point(262, 453);
-            buttonCancel.Name = "buttonCancel";
-            buttonCancel.Size = new Size(75, 23);
-            buttonCancel.TabIndex = 5;
-            buttonCancel.Text = "Отмена";
-            buttonCancel.UseVisualStyleBackColor = true;
-            buttonCancel.Click += buttonCancel_Click;
-            // 
-            // label1
-            // 
-            label1.AutoSize = true;
-            label1.Location = new Point(13, 223);
-            label1.Name = "label1";
-            label1.Size = new Size(39, 15);
-            label1.TabIndex = 12;
-            label1.Text = "Товар";
-            // 
-            // buttonSaveSupplier
-            // 
-            buttonSaveSupplier.Location = new Point(29, 453);
-            buttonSaveSupplier.Name = "buttonSaveSupplier";
-            buttonSaveSupplier.Size = new Size(75, 23);
-            buttonSaveSupplier.TabIndex = 4;
-            buttonSaveSupplier.Text = "Сохранить";
-            buttonSaveSupplier.UseVisualStyleBackColor = true;
-            buttonSaveSupplier.Click += buttonSaveProduct_Click;
-            // 
-            // numericUpDownCount
-            // 
-            numericUpDownCount.Location = new Point(58, 249);
-            numericUpDownCount.Maximum = new decimal(new int[] { 100000, 0, 0, 0 });
-            numericUpDownCount.Name = "numericUpDownCount";
-            numericUpDownCount.Size = new Size(297, 23);
-            numericUpDownCount.TabIndex = 11;
-            // 
-            // comboBoxProducts
-            // 
-            comboBoxProducts.FormattingEnabled = true;
-            comboBoxProducts.Location = new Point(58, 220);
-            comboBoxProducts.Name = "comboBoxProducts";
-            comboBoxProducts.Size = new Size(297, 23);
-            comboBoxProducts.TabIndex = 10;
-            // 
-            // dataGridViewProducts
-            // 
-            dataGridViewProducts.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-            dataGridViewProducts.Columns.AddRange(new DataGridViewColumn[] { ColumnId, Column, Column2 });
-            dataGridViewProducts.Dock = DockStyle.Top;
-            dataGridViewProducts.Location = new Point(3, 19);
-            dataGridViewProducts.Name = "dataGridViewProducts";
-            dataGridViewProducts.Size = new Size(355, 195);
-            dataGridViewProducts.TabIndex = 8;
-            // 
-            // buttonAddSupplierProduct
-            // 
-            buttonAddSupplierProduct.Location = new Point(58, 278);
-            buttonAddSupplierProduct.Name = "buttonAddSupplierProduct";
-            buttonAddSupplierProduct.Size = new Size(81, 23);
-            buttonAddSupplierProduct.TabIndex = 9;
-            buttonAddSupplierProduct.Text = "Добавить";
-            buttonAddSupplierProduct.UseVisualStyleBackColor = true;
-            buttonAddSupplierProduct.Click += buttonAddSupplierProduct_Click;
-            // 
-            // textBoxName
-            // 
-            textBoxName.Location = new Point(110, 51);
-            textBoxName.Name = "textBoxName";
-            textBoxName.Size = new Size(245, 23);
-            textBoxName.TabIndex = 0;
-            // 
-            // groupBoxControls
-            // 
-            groupBoxControls.BackColor = Color.Transparent;
-            groupBoxControls.Controls.Add(buttonDeleteSupplier);
-            groupBoxControls.Controls.Add(buttonUpdateSupplier);
-            groupBoxControls.Controls.Add(buttonCreateSupplier);
-            groupBoxControls.Dock = DockStyle.Right;
-            groupBoxControls.Location = new Point(655, 0);
-            groupBoxControls.Name = "groupBoxControls";
-            groupBoxControls.Size = new Size(264, 637);
-            groupBoxControls.TabIndex = 5;
-            groupBoxControls.TabStop = false;
-            groupBoxControls.Text = "Действия";
-            // 
-            // buttonDeleteSupplier
-            // 
-            buttonDeleteSupplier.Location = new Point(69, 120);
-            buttonDeleteSupplier.Name = "buttonDeleteSupplier";
-            buttonDeleteSupplier.Size = new Size(139, 23);
-            buttonDeleteSupplier.TabIndex = 3;
-            buttonDeleteSupplier.Text = "Удалить поставщика";
-            buttonDeleteSupplier.UseVisualStyleBackColor = true;
-            buttonDeleteSupplier.Click += buttonDeleteSupplier_Click;
-            // 
-            // buttonUpdateSupplier
-            // 
-            buttonUpdateSupplier.Location = new Point(46, 51);
-            buttonUpdateSupplier.Name = "buttonUpdateSupplier";
-            buttonUpdateSupplier.Size = new Size(179, 63);
-            buttonUpdateSupplier.TabIndex = 2;
-            buttonUpdateSupplier.Text = "Редактировать информацию о поставщике";
-            buttonUpdateSupplier.UseVisualStyleBackColor = true;
-            buttonUpdateSupplier.Click += buttonUpdateSupplier_Click;
-            // 
-            // buttonCreateSupplier
-            // 
-            buttonCreateSupplier.Location = new Point(69, 22);
-            buttonCreateSupplier.Name = "buttonCreateSupplier";
-            buttonCreateSupplier.Size = new Size(139, 23);
-            buttonCreateSupplier.TabIndex = 1;
-            buttonCreateSupplier.Text = "Добавить поставщика";
-            buttonCreateSupplier.UseVisualStyleBackColor = true;
-            buttonCreateSupplier.Click += buttonCreateSupplier_Click;
-            // 
             // dataGridView
             // 
             dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridView.Dock = DockStyle.Left;
             dataGridView.Location = new Point(0, 0);
             dataGridView.Name = "dataGridView";
-            dataGridView.Size = new Size(392, 637);
+            dataGridView.Size = new Size(615, 637);
             dataGridView.TabIndex = 4;
             // 
-            // ColumnId
+            // buttonAdd
             // 
-            ColumnId.HeaderText = "Id";
-            ColumnId.Name = "ColumnId";
-            ColumnId.ReadOnly = true;
+            buttonAdd.Location = new Point(635, 50);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(75, 23);
+            buttonAdd.TabIndex = 5;
+            buttonAdd.Text = "Добавить";
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
             // 
-            // Column
+            // buttonEdit
             // 
-            Column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
-            Column.HeaderText = "Продукт";
-            Column.Name = "Column";
-            Column.ReadOnly = true;
-            // 
-            // Column2
-            // 
-            Column2.HeaderText = "Кол-во";
-            Column2.Name = "Column2";
-            Column2.ReadOnly = true;
+            buttonEdit.Location = new Point(648, 115);
+            buttonEdit.Name = "buttonEdit";
+            buttonEdit.Size = new Size(122, 23);
+            buttonEdit.TabIndex = 6;
+            buttonEdit.Text = "Редактировать";
+            buttonEdit.UseVisualStyleBackColor = true;
+            buttonEdit.Click += buttonEdit_Click;
             // 
             // FormSuppliers
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(919, 637);
-            Controls.Add(groupBoxCreateSupplier);
-            Controls.Add(groupBoxControls);
+            Controls.Add(buttonEdit);
+            Controls.Add(buttonAdd);
             Controls.Add(dataGridView);
             Name = "FormSuppliers";
             Text = "FormSuppliers";
             Load += FormSuppliers_Load;
-            groupBoxCreateSupplier.ResumeLayout(false);
-            groupBoxCreateSupplier.PerformLayout();
-            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).EndInit();
-            groupBoxSupplierProducts.ResumeLayout(false);
-            groupBoxSupplierProducts.PerformLayout();
-            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).EndInit();
-            ((System.ComponentModel.ISupportInitialize)dataGridViewProducts).EndInit();
-            groupBoxControls.ResumeLayout(false);
             ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
             ResumeLayout(false);
         }
 
         #endregion
-
-        private GroupBox groupBoxCreateSupplier;
-        private Button buttonCancel;
-        private Button buttonSaveSupplier;
-        private TextBox textBoxName;
-        private GroupBox groupBoxControls;
-        private Button buttonDeleteSupplier;
-        private Button buttonUpdateSupplier;
-        private Button buttonCreateSupplier;
         private DataGridView dataGridView;
-        private DataGridView dataGridViewProducts;
-        private GroupBox groupBoxSupplierProducts;
-        private Button buttonAddSupplierProduct;
-        private ComboBox comboBoxProducts;
-        private Label label2;
-        private Label label1;
-        private NumericUpDown numericUpDownCount;
-        private Label label4;
-        private Label label3;
-        private NumericUpDown numericUpDownDeals;
-        private Button buttonDeleteProduct;
-        private DataGridViewTextBoxColumn ColumnId;
-        private DataGridViewTextBoxColumn Column;
-        private DataGridViewTextBoxColumn Column2;
+        private Button buttonAdd;
+        private Button buttonEdit;
     }
 }

WinFormsApp/FormSuppliers.cs

@@ -22,48 +22,24 @@ namespace WinFormsApp
 {
     public partial class FormSuppliers : Form
     {
-        private Guid? _id;
         private readonly ILogger _logger;
         private readonly ISupplierLogic _supplierLogic;
         private readonly IProductLogic _productLogic;
-        private Dictionary<Guid, (IProduct, int)> _supplierProducts;
-        private List<ProductViewModel> _productList;
         public FormSuppliers(ILogger<FormMain> logger, ISupplierLogic supplierLogic, IProductLogic productLogic)
         {
             InitializeComponent();
             _supplierLogic = supplierLogic;
             _logger = logger;
             _productLogic = productLogic;
-            _supplierProducts = new Dictionary<Guid, (IProduct, int)>();
-            _productList = _productLogic.ReadList(null);
-            if (_productList != null)
-            {
-                comboBoxProducts.DisplayMember = "Name";
-                comboBoxProducts.ValueMember = "Id";
-                comboBoxProducts.DataSource = _productList;
-                comboBoxProducts.SelectedItem = null;
-            }
         }
 
         private void FormSuppliers_Load(object sender, EventArgs e)
         {
             LoadData();
-            groupBoxCreateSupplier.Hide();
-            //groupBoxCreateProduct.Enabled = false;
-        }
-
-        private void LoadSupplierData()
-        {
-            dataGridViewProducts.Rows.Clear();
-            foreach (var pc in _supplierProducts)
-            {
-                dataGridViewProducts.Rows.Add(new object[] { pc.Key, pc.Value.Item1.Name, pc.Value.Item2 });
-            }
         }
 
         private void LoadData()
         {
-            _logger.LogInformation("Загрузка поставщиков");
             try
             {
                 var list = _supplierLogic.ReadList(null);
@@ -71,196 +47,40 @@ namespace WinFormsApp
                 {
                     dataGridView.DataSource = list;
                 }
-                _logger.LogInformation("Загрузка поставщиков");
+                _logger.LogInformation("Загрузка компьютеров");
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Ошибка загрузки поставщиков");
+                _logger.LogError(ex, "Ошибка загрузки компьютеров");
                 MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }
 
-        private void buttonCreateSupplier_Click(object sender, EventArgs e)
+        private void buttonAdd_Click(object sender, EventArgs e)
         {
-            //надо сделать че нибудь с фронтом а то всё грустно
-            groupBoxControls.Hide();
-            //groupBoxControls.Enabled = false;
-            groupBoxCreateSupplier.Show();
-            //groupBoxCreateProduct.Enabled = true;
-        }
-
-        private void buttonUpdateSupplier_Click(object sender, EventArgs e)
-        {
-            if (dataGridView.SelectedRows.Count <= 0) return;
-            _id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
-            groupBoxControls.Hide();
-            groupBoxCreateSupplier.Show();
-            _logger.LogInformation("Получение поставщика");
-            var view = _supplierLogic.ReadElement(new SupplierSearchModel
+            var service = Program.ServiceProvider?.GetService(typeof(FormSupplier));
+            if (service is FormSupplier form)
             {
-                Id = _id.Value
-            });
-            _supplierProducts = view.AvailibleProducts;
-            textBoxName.Text = view.Name;
-            numericUpDownDeals.Value = view.Deals;
-            LoadSupplierData();
+                if (form.ShowDialog() == DialogResult.OK)
+                {
+                    LoadData();
+                }
+            }
         }
 
-        private void buttonCancel_Click(object sender, EventArgs e)
+        private void buttonEdit_Click(object sender, EventArgs e)
         {
-            _id = null;
-            _supplierProducts.Clear();
-            groupBoxControls.Show();
-            //groupBoxControls.Enabled = false;
-            groupBoxCreateSupplier.Hide();
-            //groupBoxCreateProduct.Enabled = true;
-            textBoxName.Text = string.Empty;
-        }
 
-        private void buttonDeleteSupplier_Click(object sender, EventArgs e)
-        {
             if (dataGridView.SelectedRows.Count == 1)
             {
-                if (MessageBox.Show("Удалить запись?", "Вопрос",
-               MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
+                var service = Program.ServiceProvider?.GetService(typeof(FormSupplier));
+                if (service is FormSupplier form)
                 {
-                    Guid id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
-                    _logger.LogInformation("Удаление товара");
-                    try
+                    form.Id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
+                    if (form.ShowDialog() == DialogResult.OK)
                     {
-                        if (!_productLogic.Delete(new ProductBindingModel
-                        {
-                            Id = id
-                        }))
-                        {
-                            throw new Exception("Ошибка при удалении. Дополнительная информация в логах.");
-                        }
                         LoadData();
                     }
-                    catch (Exception ex)
-                    {
-                        _logger.LogError(ex, "Ошибка удаления товара");
-                        MessageBox.Show(ex.Message, "Ошибка",
-                        MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    }
-                }
-            }
-        }
-
-        public IProduct? ProductModel
-        {
-            get
-            {
-                if (_productList == null)
-                {
-                    return null;
-                }
-                foreach (var elem in _productList)
-                {
-                    if (elem.Id == Id)
-                    {
-                        return elem;
-                    }
-                }
-                return null;
-            }
-        }
-
-        public Guid Id
-        {
-            get
-            {
-                return (Guid)comboBoxProducts.SelectedValue;
-            }
-            set
-            {
-                comboBoxProducts.SelectedValue = value;
-            }
-        }
-
-        private void buttonAddSupplierProduct_Click(object sender, EventArgs e)
-        {
-            Debug.WriteLine(comboBoxProducts.SelectedValue);
-            if (_supplierProducts.ContainsKey(Id))
-            {
-                _supplierProducts[Id] = (ProductModel, Convert.ToInt16(numericUpDownCount.Value));
-            }
-            else
-            {
-                _supplierProducts.Add(Id, (ProductModel, Convert.ToInt16(numericUpDownCount.Value)));
-            }
-
-            LoadSupplierData();
-        }
-
-        private void buttonSaveProduct_Click(object sender, EventArgs e)
-        {
-            if (string.IsNullOrEmpty(textBoxName.Text))
-            {
-                MessageBox.Show("Заполните имя поставщика", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                return;
-            }
-            _logger.LogInformation("Сохранение поставщика");
-            try
-            {
-                var model = new SupplierBindingModel
-                {
-                    Id = _id ?? Guid.Empty,
-                    Name = textBoxName.Text,
-                    Deals = Convert.ToInt32(numericUpDownDeals.Value),
-                    AvailibleProducts = _supplierProducts
-                };
-
-                var operationResult = _id.HasValue ? _supplierLogic.Update(model) : _supplierLogic.Create(model);
-
-                if (!operationResult)
-                {
-                    throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
-                }
-                MessageBox.Show("Сохранение прошло успешно", "Сообщение",
-                MessageBoxButtons.OK, MessageBoxIcon.Information);
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex, "Ошибка сохранения поставщика");
-                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
-               MessageBoxIcon.Error);
-            }
-            finally
-            {
-                LoadData();
-                _id = null;
-                _supplierProducts = new Dictionary<Guid, (IProduct, int)>();
-                textBoxName.Text = string.Empty;
-                numericUpDownDeals.Value = 0;
-                //groupBoxControls.Enabled = true;
-                groupBoxControls.Show();
-                //groupBoxCreateSupplier.Enabled = false;
-                groupBoxCreateSupplier.Hide();
-                textBoxName.Text = string.Empty;
-            }
-        }
-
-        private void buttonDeleteProduct_Click(object sender, EventArgs e)
-        {
-            if (dataGridViewProducts.SelectedRows.Count == 1)
-            {
-                if (MessageBox.Show("Удалить запись?", "Вопрос",
-               MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
-                {
-                    try
-                    {
-                        _logger.LogInformation("Удаление продукта из списка доступных продуктов поставщика");
-                        Debug.WriteLine(_supplierProducts.Keys);
-                        Debug.WriteLine(_supplierProducts.Values);
-                        Debug.WriteLine((Guid)dataGridView.SelectedRows[0].Cells[0].Value);
-                        _supplierProducts?.Remove((Guid)dataGridView.SelectedRows[0].Cells[0].Value);
-                    }
-                    catch (Exception ex)
-                    {
-                        MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    }
-                    LoadSupplierData();
                 }
             }
         }

WinFormsApp/FormSuppliers.resx

@@ -117,13 +117,4 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <metadata name="ColumnId.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="Column.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
-  <metadata name="Column2.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
-    <value>True</value>
-  </metadata>
 </root>

WinFormsApp/FormSupply.Designer.cs

@@ -0,0 +1,210 @@
+namespace WinFormsApp
+{
+    partial class FormSupply
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            textBoxName = new TextBox();
+            dataGridView = new DataGridView();
+            ProductId = new DataGridViewTextBoxColumn();
+            ProductName = new DataGridViewTextBoxColumn();
+            ProductAmount = new DataGridViewTextBoxColumn();
+            groupBoxProducts = new GroupBox();
+            buttonDeleteProduct = new Button();
+            buttonUpdateProduct = new Button();
+            buttonAddProduct = new Button();
+            label1 = new Label();
+            buttonSave = new Button();
+            buttonCancel = new Button();
+            textBoxPrice = new TextBox();
+            comboBoxSupplier = new ComboBox();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            groupBoxProducts.SuspendLayout();
+            SuspendLayout();
+            // 
+            // textBoxName
+            // 
+            textBoxName.Location = new Point(18, 41);
+            textBoxName.Multiline = true;
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(434, 103);
+            textBoxName.TabIndex = 0;
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Columns.AddRange(new DataGridViewColumn[] { ProductId, ProductName, ProductAmount });
+            dataGridView.Location = new Point(6, 22);
+            dataGridView.Name = "dataGridView";
+            dataGridView.Size = new Size(423, 241);
+            dataGridView.TabIndex = 1;
+            // 
+            // ProductId
+            // 
+            ProductId.HeaderText = "Id";
+            ProductId.Name = "ProductId";
+            ProductId.ReadOnly = true;
+            ProductId.Visible = false;
+            // 
+            // ProductName
+            // 
+            ProductName.HeaderText = "Название";
+            ProductName.Name = "ProductName";
+            ProductName.ReadOnly = true;
+            // 
+            // ProductAmount
+            // 
+            ProductAmount.HeaderText = "Количество";
+            ProductAmount.Name = "ProductAmount";
+            ProductAmount.ReadOnly = true;
+            // 
+            // groupBoxProducts
+            // 
+            groupBoxProducts.Controls.Add(buttonDeleteProduct);
+            groupBoxProducts.Controls.Add(buttonUpdateProduct);
+            groupBoxProducts.Controls.Add(buttonAddProduct);
+            groupBoxProducts.Controls.Add(dataGridView);
+            groupBoxProducts.Location = new Point(12, 150);
+            groupBoxProducts.Name = "groupBoxProducts";
+            groupBoxProducts.Size = new Size(776, 288);
+            groupBoxProducts.TabIndex = 2;
+            groupBoxProducts.TabStop = false;
+            groupBoxProducts.Text = "Товары";
+            // 
+            // buttonDeleteProduct
+            // 
+            buttonDeleteProduct.Location = new Point(435, 132);
+            buttonDeleteProduct.Name = "buttonDeleteProduct";
+            buttonDeleteProduct.Size = new Size(126, 49);
+            buttonDeleteProduct.TabIndex = 4;
+            buttonDeleteProduct.Text = "Удалить";
+            buttonDeleteProduct.UseVisualStyleBackColor = true;
+            buttonDeleteProduct.Click += buttonDeleteProduct_Click;
+            // 
+            // buttonUpdateProduct
+            // 
+            buttonUpdateProduct.Location = new Point(435, 77);
+            buttonUpdateProduct.Name = "buttonUpdateProduct";
+            buttonUpdateProduct.Size = new Size(126, 49);
+            buttonUpdateProduct.TabIndex = 3;
+            buttonUpdateProduct.Text = "Изменить";
+            buttonUpdateProduct.UseVisualStyleBackColor = true;
+            buttonUpdateProduct.Click += buttonUpdateProduct_Click;
+            // 
+            // buttonAddProduct
+            // 
+            buttonAddProduct.Location = new Point(435, 22);
+            buttonAddProduct.Name = "buttonAddProduct";
+            buttonAddProduct.Size = new Size(126, 49);
+            buttonAddProduct.TabIndex = 2;
+            buttonAddProduct.Text = "Добавить";
+            buttonAddProduct.UseVisualStyleBackColor = true;
+            buttonAddProduct.Click += buttonAddProduct_Click;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Location = new Point(18, 23);
+            label1.Name = "label1";
+            label1.Size = new Size(100, 15);
+            label1.TabIndex = 3;
+            label1.Text = "Общие сведения";
+            // 
+            // buttonSave
+            // 
+            buttonSave.Location = new Point(654, 40);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(75, 23);
+            buttonSave.TabIndex = 4;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += buttonSave_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(654, 88);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(75, 23);
+            buttonCancel.TabIndex = 5;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // textBoxPrice
+            // 
+            textBoxPrice.Enabled = false;
+            textBoxPrice.Location = new Point(473, 88);
+            textBoxPrice.Name = "textBoxPrice";
+            textBoxPrice.Size = new Size(100, 23);
+            textBoxPrice.TabIndex = 6;
+            // 
+            // comboBoxSupplier
+            // 
+            comboBoxSupplier.FormattingEnabled = true;
+            comboBoxSupplier.Location = new Point(473, 41);
+            comboBoxSupplier.Name = "comboBoxSupplier";
+            comboBoxSupplier.Size = new Size(121, 23);
+            comboBoxSupplier.TabIndex = 7;
+            // 
+            // FormSupply
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(comboBoxSupplier);
+            Controls.Add(textBoxPrice);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(label1);
+            Controls.Add(groupBoxProducts);
+            Controls.Add(textBoxName);
+            Name = "FormSupply";
+            Text = "FormSupply";
+            Load += FormSupply_Load;
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            groupBoxProducts.ResumeLayout(false);
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private TextBox textBoxName;
+        private DataGridView dataGridView;
+        private DataGridViewTextBoxColumn ProductId;
+        private DataGridViewTextBoxColumn ProductName;
+        private DataGridViewTextBoxColumn ProductAmount;
+        private GroupBox groupBoxProducts;
+        private Button buttonAddProduct;
+        private Label label1;
+        private Button buttonUpdateProduct;
+        private Button buttonDeleteProduct;
+        private Button buttonSave;
+        private Button buttonCancel;
+        private TextBox textBoxPrice;
+        private ComboBox comboBoxSupplier;
+    }
+}

WinFormsApp/FormSupply.cs

@@ -0,0 +1,222 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using DataModels.Models;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Diagnostics;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace WinFormsApp
+{
+    public partial class FormSupply : Form
+    {
+        private readonly ILogger _logger;
+        private readonly ISupplyLogic _logic;
+        private readonly ISupplierLogic _supplierLogic;
+        private Guid? _id;
+        private Dictionary<Guid, (IProduct, int)> _supplyProducts;
+        public Guid Id { set { _id = value; } }
+        public FormSupply(ILogger<FormSupply> logger, ISupplyLogic logic, ISupplierLogic supplierLogic)
+        {
+            InitializeComponent();
+            _logger = logger;
+            _logic = logic;
+            _supplyProducts = new Dictionary<Guid, (IProduct, int)>();
+            _supplierLogic = supplierLogic;
+        }
+        private void FormSupply_Load(object sender, EventArgs e)
+        {
+            if (_id.HasValue)
+            {
+                _logger.LogInformation("Загрузка изделия");
+                try
+                {
+                    var view = _logic.ReadElement(new SupplySearchModel
+                    {
+                        Id = _id.Value
+                    });
+                    if (view != null)
+                    {
+                        textBoxName.Text = view.Name;
+                        _supplyProducts = view.Products ?? new Dictionary<Guid, (IProduct, int)>();
+                        LoadData();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Ошибка загрузки изделия");
+                    MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                }
+            }
+            try
+            {
+                var list = _supplierLogic.ReadList(null);
+                if (list != null)
+                {
+                    comboBoxSupplier.DisplayMember = "Name";
+                    comboBoxSupplier.ValueMember = "Id";
+                    comboBoxSupplier.DataSource = list;
+                    comboBoxSupplier.SelectedItem = null;
+                }
+
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка загрузки списка клиентов");
+                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadData()
+        {
+            _logger.LogInformation("Загрузка компонент изделия");
+            try
+            {
+                if (_supplyProducts != null)
+                {
+                    dataGridView.Rows.Clear();
+                    foreach (var pc in _supplyProducts)
+                    {
+                        dataGridView.Rows.Add(new object[] { pc.Key, pc.Value.Item1.Name, pc.Value.Item2 });
+                    }
+                    textBoxPrice.Text = CalcPrice().ToString();
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка загрузки компонент изделия");
+                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
+               MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonAddProduct_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormSupplyProduct));
+            if (service is FormSupplyProduct form)
+            {
+                if (form.ShowDialog() == DialogResult.OK)
+                {
+                    if (form.ProductModel == null)
+                    {
+                        return;
+                    }
+                    _logger.LogInformation("Добавление нового компонента");
+                    if (_supplyProducts.ContainsKey(form.Id))
+                    {
+                        _supplyProducts[form.Id] = (form.ProductModel, form.Count);
+                    }
+                    else
+                    {
+                        _supplyProducts.Add(form.Id, (form.ProductModel, form.Count));
+                    }
+                    LoadData();
+                }
+            }
+        }
+
+        private void buttonUpdateProduct_Click(object sender, EventArgs e)
+        {
+            if (dataGridView.SelectedRows.Count == 1)
+            {
+                var service =
+               Program.ServiceProvider?.GetService(typeof(FormSupplyProduct));
+                if (service is FormSupplyProduct form)
+                {
+                    Guid id = (Guid)dataGridView.SelectedRows[0].Cells[0].Value;
+                    form.Id = id;
+                    form.Count = _supplyProducts[id].Item2;
+                    if (form.ShowDialog() == DialogResult.OK)
+                    {
+                        if (form.ProductModel == null)
+                        {
+                            return;
+                        }
+                        _logger.LogInformation("Изменение компонента");
+                        _supplyProducts[form.Id] = (form.ProductModel, form.Count);
+                        LoadData();
+                    }
+                }
+            }
+        }
+
+        private void buttonDeleteProduct_Click(object sender, EventArgs e)
+        {
+            if (dataGridView.SelectedRows.Count == 1)
+            {
+                if (MessageBox.Show("Удалить запись?", "Вопрос",
+               MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
+                {
+                    try
+                    {
+                        _logger.LogInformation("Удаление компонента");
+                        _supplyProducts?.Remove((Guid)dataGridView.SelectedRows[0].Cells[0].Value);
+                    }
+                    catch (Exception ex)
+                    {
+                        MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    }
+                    LoadData();
+                }
+            }
+        }
+
+        private void buttonSave_Click(object sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(textBoxName.Text))
+            {
+                MessageBox.Show("Заполните информацию", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (_supplyProducts == null || _supplyProducts.Count == 0)
+            {
+                MessageBox.Show("Заполните товары", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            _logger.LogInformation("Сохранение изделия");
+            try
+            {
+                var model = new SupplyBindingModel
+                {
+                    Id = _id ?? Guid.NewGuid(),
+                    Name = textBoxName.Text,
+                    Date = DateTime.UtcNow,
+                    Price = Convert.ToDouble(textBoxPrice.Text),
+                    SupplierId = (Guid)comboBoxSupplier.SelectedValue,
+                    SupplyProducts = _supplyProducts,
+                    
+                };
+                var operationResult = _id.HasValue ? _logic.Update(model) : _logic.Create(model);
+                if (!operationResult)
+                {
+                    throw new Exception("Ошибка при сохранении. Дополнительная информация в логах.");
+                }
+                MessageBox.Show("Сохранение прошло успешно", "Сообщение", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                DialogResult = DialogResult.OK;
+                Close();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка сохранения изделия"); MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private double CalcPrice()
+        {
+            double price = 0;
+            foreach (var elem in _supplyProducts)
+            {
+                price += ((elem.Value.Item1?.Price ?? 0) * elem.Value.Item2);
+            }
+            return Math.Round(price * 1.1, 2);
+        }
+    }
+}

WinFormsApp/FormSupply.resx

@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="ProductId.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductName.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ProductAmount.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+</root>

WinFormsApp/FormSupplyProduct.Designer.cs

@@ -0,0 +1,94 @@
+namespace WinFormsApp
+{
+    partial class FormSupplyProduct
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            numericUpDownCount = new NumericUpDown();
+            comboBoxProduct = new ComboBox();
+            buttonSave = new Button();
+            buttonCancel = new Button();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).BeginInit();
+            SuspendLayout();
+            // 
+            // numericUpDownCount
+            // 
+            numericUpDownCount.Location = new Point(26, 76);
+            numericUpDownCount.Name = "numericUpDownCount";
+            numericUpDownCount.Size = new Size(120, 23);
+            numericUpDownCount.TabIndex = 1;
+            // 
+            // comboBoxProduct
+            // 
+            comboBoxProduct.FormattingEnabled = true;
+            comboBoxProduct.Location = new Point(25, 33);
+            comboBoxProduct.Name = "comboBoxProduct";
+            comboBoxProduct.Size = new Size(121, 23);
+            comboBoxProduct.TabIndex = 2;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Location = new Point(192, 74);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(75, 23);
+            buttonSave.TabIndex = 3;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(192, 98);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(75, 23);
+            buttonCancel.TabIndex = 4;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // FormSupplyProduct
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(287, 138);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(comboBoxProduct);
+            Controls.Add(numericUpDownCount);
+            Name = "FormSupplyProduct";
+            Text = "FormSupplyProduct";
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+        private NumericUpDown numericUpDownCount;
+        private ComboBox comboBoxProduct;
+        private Button buttonSave;
+        private Button buttonCancel;
+    }
+}

WinFormsApp/FormSupplyProduct.cs

@@ -0,0 +1,88 @@
+using Contracts.BusinessLogicContracts;
+using Contracts.ViewModels;
+using DataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace WinFormsApp
+{
+    public partial class FormSupplyProduct : Form
+    {
+        private readonly List<ProductViewModel>? _list;
+        public Guid Id
+        {
+            get
+            {
+                return (Guid)comboBoxProduct.SelectedValue;
+            }
+            set
+            {
+                comboBoxProduct.SelectedValue = value;
+            }
+        }
+
+        public IProduct? ProductModel
+        {
+            get
+            {
+                if (_list == null)
+                {
+                    return null;
+                }
+                foreach (var elem in _list)
+                {
+                    if (elem.Id == Id)
+                    {
+                        return elem;
+                    }
+                }
+                return null;
+            }
+        }
+
+        public int Count
+        {
+            get { return Convert.ToInt32(numericUpDownCount.Value); }
+            set { numericUpDownCount.Value = value; }
+        }
+        public FormSupplyProduct(IProductLogic logic)
+        {
+            InitializeComponent();
+            _list = logic.ReadList(null);
+            if (_list != null)
+            {
+                comboBoxProduct.DisplayMember = "Name";
+                comboBoxProduct.ValueMember = "Id";
+                comboBoxProduct.DataSource = _list;
+                comboBoxProduct.SelectedItem = null;
+            }
+        }
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            if (numericUpDownCount.Value == null || numericUpDownCount.Value <= 0)
+            {
+                MessageBox.Show("Кол-во товаров должно иметь значение больше 0", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (comboBoxProduct.SelectedValue == null)
+            {
+                MessageBox.Show("Выберите товар", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            DialogResult = DialogResult.OK;
+            Close();
+        }
+        private void ButtonCancel_Click(object sender, EventArgs e)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
+        }
+    }
+}

WinFormsApp/FormSupplyProduct.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

WinFormsApp/Program.cs

@@ -47,6 +47,11 @@ namespace WinFormsApp
             services.AddTransient<FormMain>();
             services.AddTransient<FormProducts>();
             services.AddTransient<FormSuppliers>();
+            services.AddTransient<FormSupplier>();
+            services.AddTransient<FormSupply>();
+            services.AddTransient<FormSupplyProduct>();
+            services.AddTransient<FormSupplierProduct>();
+
         }
     }
 }