Наполовину работает

Contracts/ViewModels/ProductViewModel.cs

@@ -7,12 +7,12 @@ using System.Threading.Tasks;
 
 namespace Contracts.ViewModels
 {
-    public class ProductViewModel
+    public class ProductViewModel : IProduct
     {
         public Guid Id { get; set; }
         public string Name { get; set; } = string.Empty;
         public double Price {  get; set; }
-        public double Rating { get; set; }
+        public double Rate { get; set; }
         public bool IsBeingSold { get; set; }
         public int Amount { get; set; }
         public List<MediaFileViewModel> MediaFiles { get; set; } = new();

Contracts/ViewModels/SupplierViewModel.cs

@@ -11,6 +11,7 @@ namespace Contracts.ViewModels
     {
         public Guid Id { get; set; }
         public string Name { get; set; } = string.Empty;
+        public int Deals { get; set; }
         public Dictionary<Guid, (IProduct, int)> AvailibleProducts = new();
     }
 }

DatabaseImplement/Implements/SupplierStorage.cs

@@ -37,7 +37,7 @@ namespace DatabaseImplement.Implements
             }
             using var context = new Database();
             return context.Suppliers
-            .Include(x => x.Name)
+            //.Include(x => x.Name)
             .Include(x => x.Products)
             .ThenInclude(x => x.Product)
             .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;

DatabaseImplement/Models/Product.cs

@@ -41,7 +41,7 @@ namespace DatabaseImplement.Models
 			Id = model.Id,
 			Name = model.Name,
 			Price = model.Price,
-			Rate = model.Rating,
+			Rate = model.Rate,
 			IsBeingSold = model.IsBeingSold,
 			Amount = model.Amount
 		};
@@ -95,7 +95,7 @@ namespace DatabaseImplement.Models
                     Name = Name,
                     Price = Price,
                     IsBeingSold = IsBeingSold,
-                    Rating = Rate,
+                    Rate = Rate,
 					Amount = Amount
                 };
             }

DatabaseImplement/Models/Supplier.cs

@@ -71,7 +71,8 @@ namespace DatabaseImplement.Models
                 {
                     Id = Id,
                     Name = Name,
-                    AvailibleProducts = AvailibleProducts
+                    AvailibleProducts = AvailibleProducts,
+                    Deals = Deals,
                 };
             }
         }

WinFormsApp/FormMain.Designer.cs

@@ -32,6 +32,7 @@
             buttonCreateSupply = new Button();
             menuStrip1 = new MenuStrip();
             товарыToolStripMenuItem = new ToolStripMenuItem();
+            поставщикиToolStripMenuItem = new ToolStripMenuItem();
             ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
             menuStrip1.SuspendLayout();
             SuspendLayout();
@@ -39,14 +40,15 @@
             // dataGridView
             // 
             dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-            dataGridView.Location = new Point(12, 28);
+            dataGridView.Dock = DockStyle.Left;
+            dataGridView.Location = new Point(0, 24);
             dataGridView.Name = "dataGridView";
-            dataGridView.Size = new Size(614, 321);
+            dataGridView.Size = new Size(663, 360);
             dataGridView.TabIndex = 0;
             // 
             // buttonCreateSupply
             // 
-            buttonCreateSupply.Location = new Point(632, 28);
+            buttonCreateSupply.Location = new Point(706, 12);
             buttonCreateSupply.Name = "buttonCreateSupply";
             buttonCreateSupply.Size = new Size(154, 23);
             buttonCreateSupply.TabIndex = 1;
@@ -55,10 +57,10 @@
             // 
             // menuStrip1
             // 
-            menuStrip1.Items.AddRange(new ToolStripItem[] { товарыToolStripMenuItem });
+            menuStrip1.Items.AddRange(new ToolStripItem[] { товарыToolStripMenuItem, поставщикиToolStripMenuItem });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
-            menuStrip1.Size = new Size(798, 24);
+            menuStrip1.Size = new Size(901, 24);
             menuStrip1.TabIndex = 2;
             menuStrip1.Text = "menuStrip1";
             // 
@@ -67,13 +69,20 @@
             товарыToolStripMenuItem.Name = "товарыToolStripMenuItem";
             товарыToolStripMenuItem.Size = new Size(60, 20);
             товарыToolStripMenuItem.Text = "Товары";
-            товарыToolStripMenuItem.Click += товарыToolStripMenuItem_Click;
+            товарыToolStripMenuItem.Click += товарыToolStripMenuItem_Click_1;
+            // 
+            // поставщикиToolStripMenuItem
+            // 
+            поставщикиToolStripMenuItem.Name = "поставщикиToolStripMenuItem";
+            поставщикиToolStripMenuItem.Size = new Size(89, 20);
+            поставщикиToolStripMenuItem.Text = "Поставщики";
+            поставщикиToolStripMenuItem.Click += поставщикиToolStripMenuItem_Click_1;
             // 
             // FormMain
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(798, 361);
+            ClientSize = new Size(901, 384);
             Controls.Add(buttonCreateSupply);
             Controls.Add(dataGridView);
             Controls.Add(menuStrip1);
@@ -94,5 +103,6 @@
         private Button buttonCreateSupply;
         private MenuStrip menuStrip1;
         private ToolStripMenuItem товарыToolStripMenuItem;
+        private ToolStripMenuItem поставщикиToolStripMenuItem;
     }
 }

WinFormsApp/FormMain.cs

@@ -51,8 +51,7 @@ namespace WinFormsApp
                 MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }
-
+        private void товарыToolStripMenuItem_Click_1(object sender, EventArgs e)
-        private void товарыToolStripMenuItem_Click(object sender, EventArgs e)
         {
             var service = Program.ServiceProvider?.GetService(typeof(FormProducts));
             if (service is FormProducts form)
@@ -60,5 +59,14 @@ namespace WinFormsApp
                 form.ShowDialog();
             }
         }
+
+        private void поставщикиToolStripMenuItem_Click_1(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormSuppliers));
+            if (service is FormSuppliers form)
+            {
+                form.ShowDialog();
+            }
+        }
     }
 }

WinFormsApp/FormProducts.Designer.cs

@@ -31,6 +31,7 @@
             dataGridView = new DataGridView();
             buttonCreateProduct = new Button();
             groupBoxControls = new GroupBox();
+            buttonDeleteProduct = new Button();
             buttonUpdateProduct = new Button();
             groupBoxCreateProduct = new GroupBox();
             numericUpDownAmount = new NumericUpDown();
@@ -39,7 +40,6 @@
             buttonSaveProduct = new Button();
             checkBoxIsSold = new CheckBox();
             textBoxName = new TextBox();
-            buttonDeleteProduct = new Button();
             ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
             groupBoxControls.SuspendLayout();
             groupBoxCreateProduct.SuspendLayout();
@@ -50,9 +50,10 @@
             // dataGridView
             // 
             dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
-            dataGridView.Location = new Point(12, 12);
+            dataGridView.Dock = DockStyle.Left;
+            dataGridView.Location = new Point(0, 0);
             dataGridView.Name = "dataGridView";
-            dataGridView.Size = new Size(631, 304);
+            dataGridView.Size = new Size(602, 646);
             dataGridView.TabIndex = 0;
             // 
             // buttonCreateProduct
@@ -71,13 +72,24 @@
             groupBoxControls.Controls.Add(buttonDeleteProduct);
             groupBoxControls.Controls.Add(buttonUpdateProduct);
             groupBoxControls.Controls.Add(buttonCreateProduct);
-            groupBoxControls.Location = new Point(649, 12);
+            groupBoxControls.Dock = DockStyle.Right;
+            groupBoxControls.Location = new Point(617, 0);
             groupBoxControls.Name = "groupBoxControls";
-            groupBoxControls.Size = new Size(264, 304);
+            groupBoxControls.Size = new Size(308, 646);
             groupBoxControls.TabIndex = 2;
             groupBoxControls.TabStop = false;
             groupBoxControls.Text = "Действия";
             // 
+            // buttonDeleteProduct
+            // 
+            buttonDeleteProduct.Location = new Point(69, 102);
+            buttonDeleteProduct.Name = "buttonDeleteProduct";
+            buttonDeleteProduct.Size = new Size(139, 23);
+            buttonDeleteProduct.TabIndex = 3;
+            buttonDeleteProduct.Text = "Удалить товар";
+            buttonDeleteProduct.UseVisualStyleBackColor = true;
+            buttonDeleteProduct.Click += buttonDeleteProduct_Click;
+            // 
             // buttonUpdateProduct
             // 
             buttonUpdateProduct.Location = new Point(69, 62);
@@ -97,9 +109,10 @@
             groupBoxCreateProduct.Controls.Add(buttonSaveProduct);
             groupBoxCreateProduct.Controls.Add(checkBoxIsSold);
             groupBoxCreateProduct.Controls.Add(textBoxName);
-            groupBoxCreateProduct.Location = new Point(649, 330);
+            groupBoxCreateProduct.Dock = DockStyle.Right;
+            groupBoxCreateProduct.Location = new Point(383, 0);
             groupBoxCreateProduct.Name = "groupBoxCreateProduct";
-            groupBoxCreateProduct.Size = new Size(257, 304);
+            groupBoxCreateProduct.Size = new Size(234, 646);
             groupBoxCreateProduct.TabIndex = 3;
             groupBoxCreateProduct.TabStop = false;
             groupBoxCreateProduct.Text = "Создание/изменение продукта";
@@ -158,16 +171,6 @@
             textBoxName.Size = new Size(100, 23);
             textBoxName.TabIndex = 0;
             // 
-            // buttonDeleteProduct
-            // 
-            buttonDeleteProduct.Location = new Point(69, 102);
-            buttonDeleteProduct.Name = "buttonDeleteProduct";
-            buttonDeleteProduct.Size = new Size(139, 23);
-            buttonDeleteProduct.TabIndex = 3;
-            buttonDeleteProduct.Text = "Удалить товар";
-            buttonDeleteProduct.UseVisualStyleBackColor = true;
-            buttonDeleteProduct.Click += buttonDeleteProduct_Click;
-            // 
             // FormProducts
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);

WinFormsApp/FormSuppliers.Designer.cs

@@ -0,0 +1,313 @@
+namespace WinFormsApp
+{
+    partial class FormSuppliers
+    {
+        /// <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()
+        {
+            groupBoxCreateSupplier = new GroupBox();
+            groupBoxSupplierProducts = new GroupBox();
+            label2 = new Label();
+            buttonCancel = new Button();
+            label1 = new Label();
+            buttonSaveSupplier = new Button();
+            numericUpDownCount = new NumericUpDown();
+            comboBoxProducts = new ComboBox();
+            dataGridViewProducts = new DataGridView();
+            Column = new DataGridViewTextBoxColumn();
+            Column2 = new DataGridViewTextBoxColumn();
+            buttonAddSupplierProduct = new Button();
+            textBoxName = new TextBox();
+            groupBoxControls = new GroupBox();
+            buttonDeleteSupplier = new Button();
+            buttonUpdateSupplier = new Button();
+            buttonCreateSupplier = new Button();
+            dataGridView = new DataGridView();
+            numericUpDownDeals = new NumericUpDown();
+            label3 = new Label();
+            label4 = new Label();
+            groupBoxCreateSupplier.SuspendLayout();
+            groupBoxSupplierProducts.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewProducts).BeginInit();
+            groupBoxControls.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).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";
+            // 
+            // groupBoxSupplierProducts
+            // 
+            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";
+            // 
+            // 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;
+            // 
+            // 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[] { Column, Column2 });
+            dataGridViewProducts.Dock = DockStyle.Top;
+            dataGridViewProducts.Location = new Point(3, 19);
+            dataGridViewProducts.Name = "dataGridViewProducts";
+            dataGridViewProducts.Size = new Size(355, 195);
+            dataGridViewProducts.TabIndex = 8;
+            // 
+            // Column
+            // 
+            Column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+            Column.HeaderText = "Продукт";
+            Column.Name = "Column";
+            Column.ReadOnly = true;
+            // 
+            // Column2
+            // 
+            Column2.HeaderText = "Кол-во";
+            Column2.Name = "Column2";
+            Column2.ReadOnly = true;
+            // 
+            // 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.TabIndex = 4;
+            // 
+            // 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;
+            // 
+            // 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";
+            // 
+            // 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";
+            // 
+            // FormSuppliers
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(919, 637);
+            Controls.Add(groupBoxCreateSupplier);
+            Controls.Add(groupBoxControls);
+            Controls.Add(dataGridView);
+            Name = "FormSuppliers";
+            Text = "FormSuppliers";
+            Load += FormSuppliers_Load;
+            groupBoxCreateSupplier.ResumeLayout(false);
+            groupBoxCreateSupplier.PerformLayout();
+            groupBoxSupplierProducts.ResumeLayout(false);
+            groupBoxSupplierProducts.PerformLayout();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownCount).EndInit();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewProducts).EndInit();
+            groupBoxControls.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownDeals).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 DataGridViewTextBoxColumn Column;
+        private DataGridViewTextBoxColumn Column2;
+        private Label label4;
+        private Label label3;
+        private NumericUpDown numericUpDownDeals;
+    }
+}

WinFormsApp/FormSuppliers.cs

@@ -0,0 +1,251 @@
+using Contracts.BindingModels;
+using Contracts.BusinessLogicContracts;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using DataModels.Models;
+using Microsoft.EntityFrameworkCore.Metadata.Internal;
+using Microsoft.Extensions.Logging;
+using Microsoft.VisualBasic.Logging;
+using System;
+using System.Collections;
+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 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()
+        {
+            if (_id.HasValue)
+            {
+                var view = _supplierLogic.ReadElement(new SupplierSearchModel
+                {
+                    Id = _id.Value
+                });
+                _supplierProducts = view.AvailibleProducts;
+                textBoxName.Text = view.Name;
+                numericUpDownDeals.Value = view.Deals;
+            }
+            dataGridViewProducts.Rows.Clear();
+            foreach (var pc in _supplierProducts)
+            {
+                dataGridViewProducts.Rows.Add(new object[] { pc.Value.Item1.Name, pc.Value.Item2 });
+            }
+        }
+
+        private void LoadData()
+        {
+            _logger.LogInformation("Загрузка поставщиков");
+            try
+            {
+                var list = _supplierLogic.ReadList(null);
+                if (list != null)
+                {
+                    dataGridView.DataSource = list;
+                }
+                _logger.LogInformation("Загрузка поставщиков");
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Ошибка загрузки поставщиков");
+                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonCreateSupplier_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
+            {
+                Id = _id.Value
+            });
+            LoadSupplierData();
+        }
+
+        private void buttonCancel_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)
+                {
+                    Guid id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value;
+                    _logger.LogInformation("Удаление товара");
+                    try
+                    {
+                        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.Clear();
+                textBoxName.Text = string.Empty;
+                numericUpDownDeals.Value = 0;
+                groupBoxControls.Enabled = true;
+                groupBoxControls.Show();
+                groupBoxCreateSupplier.Enabled = false;
+                groupBoxCreateSupplier.Hide();
+                textBoxName.Text = string.Empty;
+            }
+        }
+    }
+}

WinFormsApp/FormSuppliers.resx

@@ -0,0 +1,126 @@
+<?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="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/Program.cs

@@ -46,6 +46,7 @@ namespace WinFormsApp
 
             services.AddTransient<FormMain>();
             services.AddTransient<FormProducts>();
+            services.AddTransient<FormSuppliers>();
         }
     }
 }