Лаба 2 готовая.

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Contract.cs

@@ -10,7 +10,7 @@ public class Contract
 {
     public int ContractID { get; private set; }
 
-    public DateTime SaleTime { get; private set; }
+    public DateTime SaleDate { get; private set; }
 
     public int PurchasingCompanyID { get; private set; }
 
@@ -23,7 +23,7 @@ public class Contract
         return new Contract
         {
             ContractID = contractID,
-            SaleTime = DateTime.Now,
+            SaleDate = DateTime.Now,
             PurchasingCompanyID = purchasingCompanyID,
             AgentsID = agentsID,
             ProductSales = productSales

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Enums/Unit.cs

@@ -8,7 +8,8 @@ namespace TradeAndProcurementEnterprice.Entities.Enums;
 
 public enum Unit
 {
-    Kilogram = 0,
+    None = 0,
-    Piece = 1,
+    Kilogram = 1,
-    Liter = 2
+    Piece = 2,
+    Liter = 3
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Product.cs

@@ -11,7 +11,7 @@ public class Product
 {
     public int Article { get; private set; }
 
-    public string Nomenclature { get; private set; } = string.Empty;
+    public string Name { get; private set; } = string.Empty;
 
     public decimal SellingPrice { get; private set; }
 
@@ -21,13 +21,13 @@ public class Product
 
     public int InventoryQuantity { get; private set; }
 
-    public static Product CreateEntity(int article, string nomenclature, decimal sellingPrice, Unit unit, 
+    public static Product CreateEntity(int article, string name, decimal sellingPrice, Unit unit, 
         Category category, int inventoryQuantity)
     {
         return new Product
         {
             Article = article,
-            Nomenclature = nomenclature ?? string.Empty,
+            Name = name ?? string.Empty,
             SellingPrice = sellingPrice,
             Unit = unit,
             Category = category,

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgents.Designer.cs

@@ -43,20 +43,18 @@
             panel1.Controls.Add(buttonEdit);
             panel1.Controls.Add(buttonAdd);
             panel1.Dock = DockStyle.Right;
-            panel1.Location = new Point(1196, 0);
+            panel1.Location = new Point(644, 0);
-            panel1.Margin = new Padding(6, 6, 6, 6);
             panel1.Name = "panel1";
-            panel1.Size = new Size(178, 929);
+            panel1.Size = new Size(96, 435);
             panel1.TabIndex = 0;
             // 
             // buttonDel
             // 
             buttonDel.BackgroundImage = Properties.Resources.remove;
             buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonDel.Location = new Point(32, 390);
+            buttonDel.Location = new Point(17, 183);
-            buttonDel.Margin = new Padding(6, 6, 6, 6);
             buttonDel.Name = "buttonDel";
-            buttonDel.Size = new Size(121, 139);
+            buttonDel.Size = new Size(65, 65);
             buttonDel.TabIndex = 3;
             buttonDel.UseVisualStyleBackColor = true;
             buttonDel.Click += ButtonDel_Click;
@@ -65,10 +63,9 @@
             // 
             buttonEdit.BackgroundImage = Properties.Resources.edit;
             buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Location = new Point(17, 95);
-            buttonEdit.Margin = new Padding(6, 6, 6, 6);
             buttonEdit.Name = "buttonEdit";
-            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.Size = new Size(65, 65);
             buttonEdit.TabIndex = 2;
             buttonEdit.UseVisualStyleBackColor = true;
             buttonEdit.Click += ButtonEdit_Click;
@@ -77,10 +74,9 @@
             // 
             buttonAdd.BackgroundImage = Properties.Resources.add;
             buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Location = new Point(17, 12);
-            buttonAdd.Margin = new Padding(6, 6, 6, 6);
             buttonAdd.Name = "buttonAdd";
-            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.Size = new Size(65, 65);
             buttonAdd.TabIndex = 1;
             buttonAdd.UseVisualStyleBackColor = true;
             buttonAdd.Click += ButtonAdd_Click;
@@ -95,25 +91,24 @@
             dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewData.Dock = DockStyle.Fill;
             dataGridViewData.Location = new Point(0, 0);
-            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
             dataGridViewData.MultiSelect = false;
             dataGridViewData.Name = "dataGridViewData";
             dataGridViewData.ReadOnly = true;
             dataGridViewData.RowHeadersVisible = false;
             dataGridViewData.RowHeadersWidth = 82;
             dataGridViewData.RowTemplate.Height = 25;
-            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewData.Size = new Size(644, 435);
             dataGridViewData.TabIndex = 1;
             // 
             // FormAgents
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1374, 929);
+            ClientSize = new Size(740, 435);
             Controls.Add(dataGridViewData);
             Controls.Add(panel1);
-            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(546, 316);
-            MinimumSize = new Size(1000, 630);
             Name = "FormAgents";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Агенты-реализаторы";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContract.Designer.cs

@@ -45,10 +45,9 @@
             // buttonCancel
             // 
             buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
-            buttonCancel.Location = new Point(292, 653);
+            buttonCancel.Location = new Point(293, 306);
-            buttonCancel.Margin = new Padding(6);
             buttonCancel.Name = "buttonCancel";
-            buttonCancel.Size = new Size(156, 49);
+            buttonCancel.Size = new Size(84, 23);
             buttonCancel.TabIndex = 32;
             buttonCancel.Text = "Отмена";
             buttonCancel.UseVisualStyleBackColor = true;
@@ -57,10 +56,9 @@
             // buttonSave
             // 
             buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
-            buttonSave.Location = new Point(50, 653);
+            buttonSave.Location = new Point(27, 306);
-            buttonSave.Margin = new Padding(6);
             buttonSave.Name = "buttonSave";
-            buttonSave.Size = new Size(156, 49);
+            buttonSave.Size = new Size(84, 23);
             buttonSave.TabIndex = 33;
             buttonSave.Text = "Сохранить";
             buttonSave.UseVisualStyleBackColor = true;
@@ -71,10 +69,9 @@
             comboBoxPurchasingCompany.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
             comboBoxPurchasingCompany.DropDownStyle = ComboBoxStyle.DropDownList;
             comboBoxPurchasingCompany.FormattingEnabled = true;
-            comboBoxPurchasingCompany.Location = new Point(221, 34);
+            comboBoxPurchasingCompany.Location = new Point(119, 16);
-            comboBoxPurchasingCompany.Margin = new Padding(6);
             comboBoxPurchasingCompany.Name = "comboBoxPurchasingCompany";
-            comboBoxPurchasingCompany.Size = new Size(241, 40);
+            comboBoxPurchasingCompany.Size = new Size(268, 23);
             comboBoxPurchasingCompany.TabIndex = 29;
             // 
             // comboBoxAgent
@@ -82,27 +79,24 @@
             comboBoxAgent.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
             comboBoxAgent.DropDownStyle = ComboBoxStyle.DropDownList;
             comboBoxAgent.FormattingEnabled = true;
-            comboBoxAgent.Location = new Point(221, 126);
+            comboBoxAgent.Location = new Point(119, 59);
-            comboBoxAgent.Margin = new Padding(6);
             comboBoxAgent.Name = "comboBoxAgent";
-            comboBoxAgent.Size = new Size(241, 40);
+            comboBoxAgent.Size = new Size(268, 23);
             comboBoxAgent.TabIndex = 30;
             // 
             // labelAgent
             // 
-            labelAgent.Location = new Point(39, 111);
+            labelAgent.Location = new Point(21, 52);
-            labelAgent.Margin = new Padding(6, 0, 6, 0);
             labelAgent.Name = "labelAgent";
-            labelAgent.Size = new Size(167, 77);
+            labelAgent.Size = new Size(90, 36);
             labelAgent.TabIndex = 27;
             labelAgent.Text = "Агент-\r\nреализатор";
             // 
             // labelPurchatingCompany
             // 
-            labelPurchatingCompany.Location = new Point(43, 23);
+            labelPurchatingCompany.Location = new Point(23, 11);
-            labelPurchatingCompany.Margin = new Padding(6, 0, 6, 0);
             labelPurchatingCompany.Name = "labelPurchatingCompany";
-            labelPurchatingCompany.Size = new Size(163, 68);
+            labelPurchatingCompany.Size = new Size(88, 32);
             labelPurchatingCompany.TabIndex = 28;
             labelPurchatingCompany.Text = "Компания закупщик";
             // 
@@ -110,11 +104,9 @@
             // 
             groupBox1.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
             groupBox1.Controls.Add(dataGridViewProduct);
-            groupBox1.Location = new Point(43, 218);
+            groupBox1.Location = new Point(23, 102);
-            groupBox1.Margin = new Padding(6);
             groupBox1.Name = "groupBox1";
-            groupBox1.Padding = new Padding(6);
+            groupBox1.Size = new Size(363, 198);
-            groupBox1.Size = new Size(422, 422);
             groupBox1.TabIndex = 34;
             groupBox1.TabStop = false;
             groupBox1.Text = "Продукт";
@@ -126,15 +118,14 @@
             dataGridViewProduct.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
             dataGridViewProduct.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewProduct.Columns.AddRange(new DataGridViewColumn[] { ColumnProduct, ColumnQuantity });
-            dataGridViewProduct.Location = new Point(6, 41);
+            dataGridViewProduct.Location = new Point(3, 19);
-            dataGridViewProduct.Margin = new Padding(6);
             dataGridViewProduct.MultiSelect = false;
             dataGridViewProduct.Name = "dataGridViewProduct";
             dataGridViewProduct.RowHeadersVisible = false;
             dataGridViewProduct.RowHeadersWidth = 82;
             dataGridViewProduct.RowTemplate.Height = 25;
             dataGridViewProduct.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
-            dataGridViewProduct.Size = new Size(404, 375);
+            dataGridViewProduct.Size = new Size(354, 176);
             dataGridViewProduct.TabIndex = 0;
             // 
             // ColumnProduct
@@ -153,9 +144,9 @@
             // 
             // FormContract
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(497, 727);
+            ClientSize = new Size(404, 341);
             Controls.Add(groupBox1);
             Controls.Add(buttonCancel);
             Controls.Add(buttonSave);
@@ -163,8 +154,7 @@
             Controls.Add(comboBoxAgent);
             Controls.Add(labelAgent);
             Controls.Add(labelPurchatingCompany);
-            Margin = new Padding(6);
+            MinimumSize = new Size(266, 363);
-            MinimumSize = new Size(480, 730);
             Name = "FormContract";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Контракт";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContract.cs

@@ -33,7 +33,7 @@ namespace TradeAndProcurementEnterprice.Forms
             comboBoxAgent.ValueMember = "Id";
 
             ColumnProduct.DataSource = productRepository.ReadProducts();
-            ColumnProduct.DisplayMember = "Nomenclature";
+            ColumnProduct.DisplayMember = "Name";
             ColumnProduct.ValueMember = "Article";
         }
 
@@ -48,6 +48,7 @@ namespace TradeAndProcurementEnterprice.Forms
 
                 _contractRepository.CreateContract(Contract.CreateOperation(0,
                     (int)comboBoxPurchasingCompany.SelectedValue!, (int)comboBoxAgent.SelectedValue!, CreateListProductSalesFromDataGrid()));
+                Close();
             }
             catch (Exception ex)
             {
@@ -67,7 +68,7 @@ namespace TradeAndProcurementEnterprice.Forms
                     continue;
                 }
 
-                list.Add(ProductSales.CreateElement(0, Convert.ToInt32(row.Cells["ColumnProduct"]), Convert.ToInt32(row.Cells["ColumnQuantity"])));
+                list.Add(ProductSales.CreateElement(0, Convert.ToInt32(row.Cells["ColumnProduct"].Value), Convert.ToInt32(row.Cells["ColumnQuantity"].Value)));
             }
             return list;
         }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContracts.Designer.cs

@@ -39,20 +39,18 @@
             // 
             panel1.Controls.Add(buttonAdd);
             panel1.Dock = DockStyle.Right;
-            panel1.Location = new Point(1196, 0);
+            panel1.Location = new Point(644, 0);
-            panel1.Margin = new Padding(6, 6, 6, 6);
             panel1.Name = "panel1";
-            panel1.Size = new Size(178, 929);
+            panel1.Size = new Size(96, 435);
             panel1.TabIndex = 0;
             // 
             // buttonAdd
             // 
             buttonAdd.BackgroundImage = Properties.Resources.add;
             buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Location = new Point(17, 12);
-            buttonAdd.Margin = new Padding(6, 6, 6, 6);
             buttonAdd.Name = "buttonAdd";
-            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.Size = new Size(65, 65);
             buttonAdd.TabIndex = 1;
             buttonAdd.UseVisualStyleBackColor = true;
             buttonAdd.Click += ButtonAdd_Click;
@@ -67,25 +65,24 @@
             dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewData.Dock = DockStyle.Fill;
             dataGridViewData.Location = new Point(0, 0);
-            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
             dataGridViewData.MultiSelect = false;
             dataGridViewData.Name = "dataGridViewData";
             dataGridViewData.ReadOnly = true;
             dataGridViewData.RowHeadersVisible = false;
             dataGridViewData.RowHeadersWidth = 82;
             dataGridViewData.RowTemplate.Height = 25;
-            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewData.Size = new Size(644, 435);
             dataGridViewData.TabIndex = 1;
             // 
             // FormContracts
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1374, 929);
+            ClientSize = new Size(740, 435);
             Controls.Add(dataGridViewData);
             Controls.Add(panel1);
-            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(546, 316);
-            MinimumSize = new Size(1000, 630);
             Name = "FormContracts";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Продажи";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegateToAgent.cs

@@ -24,7 +24,7 @@ namespace TradeAndProcurementEnterprice.Forms
                 throw new ArgumentNullException(nameof(delegateToAgentRepository));
 
             comboBoxProduct.DataSource = productRepository.ReadProducts();
-            comboBoxProduct.DisplayMember = "Nomenclature";
+            comboBoxProduct.DisplayMember = "Name";
             comboBoxProduct.ValueMember = "Article";
 
             comboBoxAgent.DataSource = agentsRepository.ReadAgents();
@@ -44,6 +44,7 @@ namespace TradeAndProcurementEnterprice.Forms
                 _delegateToAgentRepository.CreateDelegatesToAgent(DelegateToAgents.CreateOperation(0,
                     (int)comboBoxProduct.SelectedValue!, Convert.ToInt32(numericUpDownQuantity.Value),
                     (int)comboBoxAgent.SelectedValue!));
+                Close();
             }
             catch (Exception ex)
             {

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegatesToAgents.Designer.cs

@@ -39,20 +39,18 @@
             // 
             panel1.Controls.Add(buttonAdd);
             panel1.Dock = DockStyle.Right;
-            panel1.Location = new Point(1196, 0);
+            panel1.Location = new Point(644, 0);
-            panel1.Margin = new Padding(6, 6, 6, 6);
             panel1.Name = "panel1";
-            panel1.Size = new Size(178, 929);
+            panel1.Size = new Size(96, 435);
             panel1.TabIndex = 0;
             // 
             // buttonAdd
             // 
             buttonAdd.BackgroundImage = Properties.Resources.add;
             buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Location = new Point(17, 12);
-            buttonAdd.Margin = new Padding(6, 6, 6, 6);
             buttonAdd.Name = "buttonAdd";
-            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.Size = new Size(65, 65);
             buttonAdd.TabIndex = 1;
             buttonAdd.UseVisualStyleBackColor = true;
             buttonAdd.Click += ButtonAdd_Click;
@@ -67,25 +65,24 @@
             dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewData.Dock = DockStyle.Fill;
             dataGridViewData.Location = new Point(0, 0);
-            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
             dataGridViewData.MultiSelect = false;
             dataGridViewData.Name = "dataGridViewData";
             dataGridViewData.ReadOnly = true;
             dataGridViewData.RowHeadersVisible = false;
             dataGridViewData.RowHeadersWidth = 82;
             dataGridViewData.RowTemplate.Height = 25;
-            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewData.Size = new Size(644, 435);
             dataGridViewData.TabIndex = 1;
             // 
             // FormDelegatesToAgents
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1374, 929);
+            ClientSize = new Size(740, 435);
             Controls.Add(dataGridViewData);
             Controls.Add(panel1);
-            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(546, 316);
-            MinimumSize = new Size(1000, 630);
             Name = "FormDelegatesToAgents";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Передача товара агентам-реализаторам";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProduct.Designer.cs

@@ -28,12 +28,12 @@
         /// </summary>
         private void InitializeComponent()
         {
-            labelNomenclature = new Label();
+            labelName = new Label();
             labelPrice = new Label();
             labelUnit = new Label();
             labelCategory = new Label();
             labelInventoryQuantity = new Label();
-            textBoxNomenclature = new TextBox();
+            textBoxName = new TextBox();
             numericUpDownPrice = new NumericUpDown();
             comboBoxUnit = new ComboBox();
             numericUpDownQuantity = new NumericUpDown();
@@ -44,14 +44,14 @@
             ((System.ComponentModel.ISupportInitialize)numericUpDownQuantity).BeginInit();
             SuspendLayout();
             // 
-            // labelNomenclature
+            // labelName
             // 
-            labelNomenclature.AutoSize = true;
+            labelName.AutoSize = true;
-            labelNomenclature.Location = new Point(26, 27);
+            labelName.Location = new Point(26, 27);
-            labelNomenclature.Name = "labelNomenclature";
+            labelName.Name = "labelName";
-            labelNomenclature.Size = new Size(180, 33);
+            labelName.Size = new Size(180, 33);
-            labelNomenclature.TabIndex = 0;
+            labelName.TabIndex = 0;
-            labelNomenclature.Text = "Номенклатура";
+            labelName.Text = "Номенклатура";
             // 
             // labelPrice
             // 
@@ -86,19 +86,20 @@
             labelInventoryQuantity.TabIndex = 0;
             labelInventoryQuantity.Text = "Количество на складе";
             // 
-            // textBoxNomenclature
+            // textBoxName
             // 
-            textBoxNomenclature.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxName.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            textBoxNomenclature.Location = new Point(248, 24);
+            textBoxName.Location = new Point(248, 24);
-            textBoxNomenclature.Name = "textBoxNomenclature";
+            textBoxName.Name = "textBoxName";
-            textBoxNomenclature.Size = new Size(237, 41);
+            textBoxName.Size = new Size(237, 41);
-            textBoxNomenclature.TabIndex = 1;
+            textBoxName.TabIndex = 1;
             // 
             // numericUpDownPrice
             // 
             numericUpDownPrice.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
             numericUpDownPrice.DecimalPlaces = 2;
             numericUpDownPrice.Location = new Point(248, 100);
+            numericUpDownPrice.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
             numericUpDownPrice.Name = "numericUpDownPrice";
             numericUpDownPrice.Size = new Size(237, 41);
             numericUpDownPrice.TabIndex = 2;
@@ -165,12 +166,12 @@
             Controls.Add(numericUpDownQuantity);
             Controls.Add(comboBoxUnit);
             Controls.Add(numericUpDownPrice);
-            Controls.Add(textBoxNomenclature);
+            Controls.Add(textBoxName);
             Controls.Add(labelInventoryQuantity);
             Controls.Add(labelCategory);
             Controls.Add(labelUnit);
             Controls.Add(labelPrice);
-            Controls.Add(labelNomenclature);
+            Controls.Add(labelName);
             Font = new Font("Comic Sans MS", 9F, FontStyle.Regular, GraphicsUnit.Point);
             MinimumSize = new Size(585, 585);
             Name = "FormProduct";
@@ -184,12 +185,12 @@
 
         #endregion
 
-        private Label labelNomenclature;
+        private Label labelName;
         private Label labelPrice;
         private Label labelUnit;
         private Label labelCategory;
         private Label labelInventoryQuantity;
-        private TextBox textBoxNomenclature;
+        private TextBox textBoxName;
         private NumericUpDown numericUpDownPrice;
         private ComboBox comboBoxUnit;
         private NumericUpDown numericUpDownQuantity;

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProduct.cs

@@ -31,7 +31,7 @@ namespace TradeAndProcurementEnterprice.Forms
                         throw new InvalidDataException(nameof(product));
                     }
 
-                    textBoxNomenclature.Text = product.Nomenclature;
+                    textBoxName.Text = product.Name;
                     numericUpDownPrice.Value = product.SellingPrice;
                     comboBoxUnit.SelectedItem = product.Unit;
                     comboBoxCategory.SelectedItem = product.Category;
@@ -60,7 +60,7 @@ namespace TradeAndProcurementEnterprice.Forms
         {
             try
             {
-                if (string.IsNullOrEmpty(textBoxNomenclature.Text) || comboBoxUnit.SelectedIndex < 1
+                if (string.IsNullOrEmpty(textBoxName.Text) || comboBoxUnit.SelectedIndex < 1
                     || comboBoxCategory.SelectedIndex < 1)
                 {
                     throw new Exception("Имеются незаполненные поля!");
@@ -85,7 +85,7 @@ namespace TradeAndProcurementEnterprice.Forms
 
         private void ButtonCancel_Click(object sender, EventArgs e) => Close();
 
-        private Product CreateProduct(int article) => Product.CreateEntity(article, textBoxNomenclature.Text,
+        private Product CreateProduct(int article) => Product.CreateEntity(article, textBoxName.Text,
             numericUpDownPrice.Value, (Unit)comboBoxUnit.SelectedItem, (Category)comboBoxCategory.SelectedItem,
             Convert.ToInt32(numericUpDownQuantity.Value));
     }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProducts.Designer.cs

@@ -43,20 +43,18 @@
             panel1.Controls.Add(buttonEdit);
             panel1.Controls.Add(buttonAdd);
             panel1.Dock = DockStyle.Right;
-            panel1.Location = new Point(1196, 0);
+            panel1.Location = new Point(644, 0);
-            panel1.Margin = new Padding(6, 6, 6, 6);
             panel1.Name = "panel1";
-            panel1.Size = new Size(178, 929);
+            panel1.Size = new Size(96, 435);
             panel1.TabIndex = 0;
             // 
             // buttonDel
             // 
             buttonDel.BackgroundImage = Properties.Resources.remove;
             buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonDel.Location = new Point(32, 390);
+            buttonDel.Location = new Point(17, 183);
-            buttonDel.Margin = new Padding(6, 6, 6, 6);
             buttonDel.Name = "buttonDel";
-            buttonDel.Size = new Size(121, 139);
+            buttonDel.Size = new Size(65, 65);
             buttonDel.TabIndex = 3;
             buttonDel.UseVisualStyleBackColor = true;
             buttonDel.Click += ButtonDel_Click;
@@ -65,10 +63,9 @@
             // 
             buttonEdit.BackgroundImage = Properties.Resources.edit;
             buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Location = new Point(17, 95);
-            buttonEdit.Margin = new Padding(6, 6, 6, 6);
             buttonEdit.Name = "buttonEdit";
-            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.Size = new Size(65, 65);
             buttonEdit.TabIndex = 2;
             buttonEdit.UseVisualStyleBackColor = true;
             buttonEdit.Click += ButtonEdit_Click;
@@ -77,10 +74,9 @@
             // 
             buttonAdd.BackgroundImage = Properties.Resources.add;
             buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Location = new Point(17, 12);
-            buttonAdd.Margin = new Padding(6, 6, 6, 6);
             buttonAdd.Name = "buttonAdd";
-            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.Size = new Size(65, 65);
             buttonAdd.TabIndex = 1;
             buttonAdd.UseVisualStyleBackColor = true;
             buttonAdd.Click += ButtonAdd_Click;
@@ -95,25 +91,24 @@
             dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewData.Dock = DockStyle.Fill;
             dataGridViewData.Location = new Point(0, 0);
-            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
             dataGridViewData.MultiSelect = false;
             dataGridViewData.Name = "dataGridViewData";
             dataGridViewData.ReadOnly = true;
             dataGridViewData.RowHeadersVisible = false;
             dataGridViewData.RowHeadersWidth = 82;
             dataGridViewData.RowTemplate.Height = 25;
-            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewData.Size = new Size(644, 435);
             dataGridViewData.TabIndex = 1;
             // 
             // FormProducts
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1374, 929);
+            ClientSize = new Size(740, 435);
             Controls.Add(dataGridViewData);
             Controls.Add(panel1);
-            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(546, 316);
-            MinimumSize = new Size(1000, 630);
             Name = "FormProducts";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Номенклатура";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompanies.Designer.cs

@@ -43,20 +43,18 @@
             panel1.Controls.Add(buttonEdit);
             panel1.Controls.Add(buttonAdd);
             panel1.Dock = DockStyle.Right;
-            panel1.Location = new Point(1196, 0);
+            panel1.Location = new Point(644, 0);
-            panel1.Margin = new Padding(6, 6, 6, 6);
             panel1.Name = "panel1";
-            panel1.Size = new Size(178, 929);
+            panel1.Size = new Size(96, 435);
             panel1.TabIndex = 0;
             // 
             // buttonDel
             // 
             buttonDel.BackgroundImage = Properties.Resources.remove;
             buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonDel.Location = new Point(32, 390);
+            buttonDel.Location = new Point(17, 183);
-            buttonDel.Margin = new Padding(6, 6, 6, 6);
             buttonDel.Name = "buttonDel";
-            buttonDel.Size = new Size(121, 139);
+            buttonDel.Size = new Size(65, 65);
             buttonDel.TabIndex = 3;
             buttonDel.UseVisualStyleBackColor = true;
             buttonDel.Click += ButtonDel_Click;
@@ -65,10 +63,9 @@
             // 
             buttonEdit.BackgroundImage = Properties.Resources.edit;
             buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Location = new Point(17, 95);
-            buttonEdit.Margin = new Padding(6, 6, 6, 6);
             buttonEdit.Name = "buttonEdit";
-            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.Size = new Size(65, 65);
             buttonEdit.TabIndex = 2;
             buttonEdit.UseVisualStyleBackColor = true;
             buttonEdit.Click += ButtonEdit_Click;
@@ -77,10 +74,9 @@
             // 
             buttonAdd.BackgroundImage = Properties.Resources.add;
             buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
-            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Location = new Point(17, 12);
-            buttonAdd.Margin = new Padding(6, 6, 6, 6);
             buttonAdd.Name = "buttonAdd";
-            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.Size = new Size(65, 65);
             buttonAdd.TabIndex = 1;
             buttonAdd.UseVisualStyleBackColor = true;
             buttonAdd.Click += ButtonAdd_Click;
@@ -95,25 +91,24 @@
             dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
             dataGridViewData.Dock = DockStyle.Fill;
             dataGridViewData.Location = new Point(0, 0);
-            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
             dataGridViewData.MultiSelect = false;
             dataGridViewData.Name = "dataGridViewData";
             dataGridViewData.ReadOnly = true;
             dataGridViewData.RowHeadersVisible = false;
             dataGridViewData.RowHeadersWidth = 82;
             dataGridViewData.RowTemplate.Height = 25;
-            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewData.Size = new Size(644, 435);
             dataGridViewData.TabIndex = 1;
             // 
             // FormPurchasingCompanies
             // 
-            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(1374, 929);
+            ClientSize = new Size(740, 435);
             Controls.Add(dataGridViewData);
             Controls.Add(panel1);
-            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(546, 316);
-            MinimumSize = new Size(1000, 630);
             Name = "FormPurchasingCompanies";
             StartPosition = FormStartPosition.CenterParent;
             Text = "Компании закупщики";

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Program.cs

@@ -1,7 +1,11 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Serilog;
 using TradeAndProcurementEnterprice.Repositories;
 using TradeAndProcurementEnterprice.Repositories.Implementations;
 using Unity;
 using Unity.Lifetime;
+using Unity.Microsoft.Logging;
 
 namespace TradeAndProcurementEnterprice
 {
@@ -23,13 +27,29 @@ namespace TradeAndProcurementEnterprice
         {
             var container = new UnityContainer();
 
+            container.AddExtension(new LoggingExtension(CreateLoggerFactory()));
+
             container.RegisterType<IAgentsRepository, AgentsRepository>(new TransientLifetimeManager());
             container.RegisterType<IContractRepository, ContractRepository>(new TransientLifetimeManager());
             container.RegisterType<IProductRepository, ProductRepository>(new TransientLifetimeManager());
             container.RegisterType<IPurchasingCompanyRepository, PurchasingCompanyRepository>(new TransientLifetimeManager());
             container.RegisterType<IDelegateToAgentRepository, DelegateToAgentRepository>(new TransientLifetimeManager());
 
+            container.RegisterType<IConnectionString, ConnectionString>(new SingletonLifetimeManager());
+
             return container;
         }
+
+        private static LoggerFactory CreateLoggerFactory() 
+        { 
+            var loggerFactory = new LoggerFactory(); 
+            loggerFactory.AddSerilog(new LoggerConfiguration()
+                .ReadFrom.Configuration(new ConfigurationBuilder()
+                    .SetBasePath(Directory.GetCurrentDirectory())
+                    .AddJsonFile("appsettings.json")
+                    .Build())
+                .CreateLogger()); 
+            return loggerFactory; 
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IConnectionString.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IConnectionString
+{
+    public string ConnectionString { get; }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IPurchasingCompanyRepository.cs

@@ -13,9 +13,9 @@ public interface IPurchasingCompanyRepository
 
     PurchasingCompany ReadCompaniesByID(int id);
 
-    void CreateCompany(PurchasingCompany agent);
+    void CreateCompany(PurchasingCompany company);
 
-    void UpdateCompanies(PurchasingCompany agent);
+    void UpdateCompanies(PurchasingCompany company);
 
     void DeleteCompany(int id);
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/AgentsRepository.cs

@@ -1,5 +1,10 @@
-using System;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -7,27 +12,122 @@ using TradeAndProcurementEnterprice.Entities;
 
 namespace TradeAndProcurementEnterprice.Repositories.Implementations;
 
-public class AgentsRepository : IAgentsRepository
+internal class AgentsRepository : IAgentsRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<AgentsRepository> _logger;
+
+    public AgentsRepository(IConnectionString connectionString, ILogger<AgentsRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateAgent(Agent agent)
     {
+        _logger.LogInformation("Добавление объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(agent));
+
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var queryInsert = @"
+INSERT INTO Agents (Name, Qualification, Category)
+VALUES (@Name, @Qualification, @Category)";
+            connection.Execute(queryInsert, agent);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта!");
+            throw;
+        }
     }
 
     public void DeleteAgent(int id)
     {
+        _logger.LogInformation("Удаление объекта.");
+        _logger.LogDebug("Объект: {id}", id); 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var queryDelete = @" 
+DELETE FROM Agents 
+WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex) 
+        { 
+            _logger.LogError(ex, "Ошибка при удалении объекта!");
+            throw;
+        }
     }
 
     public Agent ReadAgentByID(int id)
     {
-        return Agent.CreateEntity(0, string.Empty, Entities.Enums.Qualification.Junior, Entities.Enums.Category.Other);
+        _logger.LogInformation("Получение объекта по идентификатору.");
+        _logger.LogDebug("Объект: {id}", id); 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+SELECT * FROM Agents 
+WHERE Id=@id";
+            var agent = connection.QueryFirst<Agent>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(agent));
+            return agent; 
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта!");
+            throw;
+        }
     }
 
     public IEnumerable<Agent> ReadAgents()
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов."); 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Agents";
+            var agents = connection.Query<Agent>(querySelect); 
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(agents));
+            
+            return agents;
+        } 
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов!");
+            throw;
+        }
     }
 
     public void UpdateAgent(Agent agent)
     {
+        _logger.LogInformation("Редактирование объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(agent));
+
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var queryUpdate = @"
+UPDATE Agents
+SET
+        Name=@Name,
+        Qualification=@Qualification,
+        Category=@Category
+WHERE Id=@Id";
+            connection.Execute(queryUpdate, agent);
+
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта!");
+            throw;
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/ConnectionString.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class ConnectionString : IConnectionString
+{
+    string IConnectionString.ConnectionString => "Server=localhost, 5432;Database=enterprice;Username=postgres;Password=maria;";
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/ContractRepository.cs

@@ -1,5 +1,10 @@
-using System;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -7,14 +12,66 @@ using TradeAndProcurementEnterprice.Entities;
 
 namespace TradeAndProcurementEnterprice.Repositories.Implementations;
 
-public class ContractRepository : IContractRepository
+internal class ContractRepository : IContractRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<ContractRepository> _logger;
+
+    public ContractRepository(IConnectionString connectionString, ILogger<ContractRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateContract(Contract contract)
     {
+        _logger.LogInformation("Добавление объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(contract));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            connection.Open();
+            using var transaction = connection.BeginTransaction();
+            var queryInsert = @" 
+INSERT INTO Contracts (SaleDate, PurchasingCompanyID, AgentsID) 
+VALUES (@SaleDate, @PurchasingCompanyID, @AgentsID);
+SELECT MAX(contractid) FROM Contracts";
+            var contractId = connection.QueryFirst<int>(queryInsert, contract, transaction);
+
+            var querySubInsert = @"
+INSERT INTO ProductSales (ContractId, ProductArticle, ProductQuantity)
+VALUES (@ContractId, @ProductArticle, @ProductQuantity)";
+
+            foreach (var elem in contract.ProductSales) 
+            {
+                connection.Execute(querySubInsert, new { contractId, elem.ProductArticle, elem.ProductQuantity }, transaction); 
+            }
+
+            transaction.Commit();
+        } 
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта!");
+            throw;
+        }
     }
 
     public IEnumerable<Contract> ReadContracts(DateTime? dateFrom = null, DateTime? dateTo = null, int? productArticle = null, int? agentID = null, int? purchasingCompaniID = null)
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов.");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Contracts"; 
+            var contracts = connection.Query<Contract>(querySelect); 
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(contracts));
+            return contracts; 
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов!"); 
+            throw;
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/DelegateToAgentRepository.cs

@@ -1,5 +1,10 @@
-using System;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -7,14 +12,52 @@ using TradeAndProcurementEnterprice.Entities;
 
 namespace TradeAndProcurementEnterprice.Repositories.Implementations;
 
-public class DelegateToAgentRepository : IDelegateToAgentRepository
+internal class DelegateToAgentRepository : IDelegateToAgentRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<DelegateToAgentRepository> _logger;
+
+    public DelegateToAgentRepository(IConnectionString connectionString, ILogger<DelegateToAgentRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateDelegatesToAgent(DelegateToAgents delegateToAgents)
     {
+        _logger.LogInformation("Добавление объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(delegateToAgents));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @" 
+INSERT INTO DelegateToAgents (ProductArticle, AgentsID, Quantity, Date) 
+VALUES (@ProductArticle, @AgentsID, @Quantity, @Date)";
+            connection.Execute(queryInsert, delegateToAgents);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта!");
+            throw;
+        }
     }
 
     public IEnumerable<DelegateToAgents> ReadDelegatesToAgent(DateTime? dateFrom = null, DateTime? dateTo = null, int? productArticle = null, int? agentID = null)
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов.");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM DelegateToAgents";
+            var delegatesToAgents = connection.Query<DelegateToAgents>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(delegatesToAgents));
+            return delegatesToAgents;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов!");
+            throw;
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/ProductRepository.cs

@@ -1,5 +1,10 @@
-using System;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -7,27 +12,125 @@ using TradeAndProcurementEnterprice.Entities;
 
 namespace TradeAndProcurementEnterprice.Repositories.Implementations;
 
-public class ProductRepository : IProductRepository
+internal class ProductRepository : IProductRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<ProductRepository> _logger;
+
+    public ProductRepository(IConnectionString connectionString, ILogger<ProductRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateProduct(Product product)
     {
-    }
+        _logger.LogInformation("Добавление объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(product));
 
-    public void DeleteProduct(int article)
+        try
         {
-    }
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
 
-    public Product ReadProductByArticle(int article) 
+            var queryInsert = @"
-    {
+INSERT INTO Products (Name, SellingPrice, Unit, Category, InventoryQuantity)
-        return Product.CreateEntity(0, string.Empty, 0, Entities.Enums.Unit.Piece, Entities.Enums.Category.Other, 0);
+VALUES (@Name, @SellingPrice, @Unit, @Category, @InventoryQuantity)";
-    }
 
-    public IEnumerable<Product> ReadProducts()
+            connection.Execute(queryInsert, product);
+        }
+        catch (Exception ex)
         {
-        return [];
+            _logger.LogError(ex, "Ошибка при добавлении объекта!");
+            throw;
+        }
     }
 
     public void UpdateProduct(Product product)
     {
+        _logger.LogInformation("Редактирование объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(product));
+
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var queryUpdate = @"
+UPDATE Products
+SET
+        Name=@Name,
+        SellingPrice=@SellingPrice,
+        Unit=@Unit,
+        Category=@Category,
+        InventoryQuantity=@InventoryQuantity
+WHERE Article=@article";
+            connection.Execute(queryUpdate, product);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта!");
+            throw;
+        }
+    }
+
+    public void DeleteProduct(int article)
+    {
+        _logger.LogInformation("Удаление объекта."); 
+        _logger.LogDebug("Объект: {article}", article); 
+        
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @" 
+DELETE FROM Products 
+WHERE Article=@article"; 
+            connection.Execute(queryDelete, new { article }); 
+        } 
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта!"); 
+            throw; 
+        }
+    }
+
+    public Product ReadProductByArticle(int article) 
+    {
+        _logger.LogInformation("Получение объекта по идентификатору."); 
+        _logger.LogDebug("Объект: {article}", article); 
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var querySelect = @" 
+SELECT * FROM Products
+WHERE Article=@article"; 
+            var product = connection.QueryFirst<Product>(querySelect, new { article }); 
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(product)); 
+            return product; 
+        } 
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта!"); 
+            throw; 
+        }
+    }
+
+    public IEnumerable<Product> ReadProducts()
+    {
+        _logger.LogInformation("Получение всех объектов.");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+
+            var querySelect = "SELECT * FROM Products";
+            var products = connection.Query<Product>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(products));
+            return products;
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов!");
+            throw; 
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/PurchasingCompanyRepository.cs

@@ -1,5 +1,10 @@
-using System;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using System;
 using System.Collections.Generic;
+using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -7,27 +12,114 @@ using TradeAndProcurementEnterprice.Entities;
 
 namespace TradeAndProcurementEnterprice.Repositories.Implementations;
 
-public class PurchasingCompanyRepository : IPurchasingCompanyRepository
+internal class PurchasingCompanyRepository : IPurchasingCompanyRepository
 {
-    public void CreateCompany(PurchasingCompany agent)
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<PurchasingCompanyRepository> _logger;
+
+    public PurchasingCompanyRepository(IConnectionString connectionString, ILogger<PurchasingCompanyRepository> logger)
     {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
+    public void CreateCompany(PurchasingCompany company)
+    {
+        _logger.LogInformation("Добавление объекта."); 
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(company));
+        
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @" 
+INSERT INTO PurchasingCompanies (Name)
+VALUES (@Name)";
+            connection.Execute(queryInsert, company); 
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта!");
+            throw; 
+        }
     }
 
     public void DeleteCompany(int id)
     {
+        _logger.LogInformation("Удаление объекта."); 
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+DELETE FROM purchasingCompanies
+WHERE Id=@id"; 
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта!");
+            throw;
+        }
     }
 
     public IEnumerable<PurchasingCompany> ReadCompanies()
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов.");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM purchasingCompanies";
+            var companies = connection.Query<PurchasingCompany>(querySelect); 
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(companies));
+            return companies; 
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов!");
+            throw; 
+        }
     }
 
     public PurchasingCompany ReadCompaniesByID(int id)
     {
-        return PurchasingCompany.CreateEntity(0, string.Empty);
+        _logger.LogInformation("Получение объекта по идентификатору."); 
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @" 
+SELECT * FROM PurchasingCompanies 
+WHERE Id=@id"; 
+            var company = connection.QueryFirst<PurchasingCompany>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(company));
+            return company; 
+        }
+        catch (Exception ex) 
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта!");
+            throw;
+        }
     }
 
-    public void UpdateCompanies(PurchasingCompany agent)
+    public void UpdateCompanies(PurchasingCompany company)
     {
+        _logger.LogInformation("Редактирование объекта.");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(company));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @" 
+UPDATE PurchasingCompanies
+SET 
+Name=@Name
+WHERE Id=@Id";
+            connection.Execute(queryUpdate, company);
+        } 
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта!");
+            throw;
+        }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/TradeAndProcurementEnterprice.csproj

@@ -10,7 +10,19 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Dapper" Version="2.1.35" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Npgsql" Version="9.0.2" />
+    <PackageReference Include="Serilog" Version="4.0.2" />
+    <PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />
+    <PackageReference Include="Serilog.Settings.Configuration" Version="8.0.4" />
+    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.9.0" />
     <PackageReference Include="Unity" Version="5.11.10" />
+    <PackageReference Include="Unity.Microsoft.Logging" Version="5.11.1" />
   </ItemGroup>
 
   <ItemGroup>
@@ -28,4 +40,10 @@
     </EmbeddedResource>
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/appsettings.json

@@ -0,0 +1,15 @@
+{
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.File" ],
+    "MinimumLevel": "Debug",
+    "WriteTo": [
+      {
+        "Name": "File",
+        "Args": {
+          "path": "Logs/enterprice_log.txt",
+          "rollingInterval": "Day"
+        }
+      }
+    ]
+  }
+}