Итог

ShoeStore/Entities/Receipt.cs

@@ -13,12 +13,12 @@ public class Receipt
     //public int ProductId { get; private set; }
     //public int StorageProductId { get; private set; }
     //public int ReceiptNumber {get; private set; }
-    public int ProductType { get; private set; }
+    public ProductType ProductType { get; private set; }
     public DateTime DateOfReceipt { get; private set; }
     public int NumberOfPairsReceived { get; private set; }
     //public int StorageSize { get; private set; }
 
-    public static Receipt CreateOperation(int id, int productType, int numberOfPairsReceived)
+    public static Receipt CreateOperation(int id, ProductType productType, int numberOfPairsReceived)
     {
         return new Receipt
         {

ShoeStore/Forms/FormReceipt.Designer.cs

@@ -33,7 +33,9 @@
             buttonCancel = new Button();
             buttonSave = new Button();
             label = new Label();
-            comboBox1 = new ComboBox();
+            comboBoxProdctType = new ComboBox();
+            label1 = new Label();
+            dateTimePickerDate = new DateTimePicker();
             ((System.ComponentModel.ISupportInitialize)numericUpDownNumOfPairs).BeginInit();
             SuspendLayout();
             // 
@@ -76,26 +78,44 @@
             // label
             // 
             label.AutoSize = true;
-            label.Location = new Point(27, 69);
+            label.Location = new Point(27, 96);
             label.Name = "label";
             label.Size = new Size(70, 15);
             label.TabIndex = 19;
             label.Text = "Тип товара:";
             // 
-            // comboBox1
+            // comboBoxProdctType
             // 
-            comboBox1.FormattingEnabled = true;
+            comboBoxProdctType.FormattingEnabled = true;
-            comboBox1.Location = new Point(246, 69);
+            comboBoxProdctType.Location = new Point(246, 96);
-            comboBox1.Name = "comboBox1";
+            comboBoxProdctType.Name = "comboBoxProdctType";
-            comboBox1.Size = new Size(121, 23);
+            comboBoxProdctType.Size = new Size(121, 23);
-            comboBox1.TabIndex = 20;
+            comboBoxProdctType.TabIndex = 20;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Location = new Point(27, 36);
+            label1.Name = "label1";
+            label1.Size = new Size(35, 15);
+            label1.TabIndex = 22;
+            label1.Text = "Дата:";
+            // 
+            // dateTimePickerDate
+            // 
+            dateTimePickerDate.Location = new Point(246, 36);
+            dateTimePickerDate.Name = "dateTimePickerDate";
+            dateTimePickerDate.Size = new Size(132, 23);
+            dateTimePickerDate.TabIndex = 21;
             // 
             // FormReceipt
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(398, 330);
-            Controls.Add(comboBox1);
+            Controls.Add(label1);
+            Controls.Add(dateTimePickerDate);
+            Controls.Add(comboBoxProdctType);
             Controls.Add(label);
             Controls.Add(buttonCancel);
             Controls.Add(buttonSave);
@@ -114,6 +134,8 @@
         private Button buttonCancel;
         private Button buttonSave;
         private Label label;
-        private ComboBox comboBox1;
+        private ComboBox comboBoxProdctType;
+        private Label label1;
+        private DateTimePicker dateTimePickerDate;
     }
 }

ShoeStore/Forms/FormReceipt.cs

@@ -1,4 +1,5 @@
 using ShoeStore.Entities;
+using ShoeStore.Entities.Enums;
 using ShoeStore.Repositories;
 using ShoeStore.Repositories.Implementations;
 using System;
@@ -24,21 +25,36 @@ namespace ShoeStore.Froms
             InitializeComponent();
             _receiptRepository = receiptRepository ?? throw new ArgumentNullException(nameof(receiptRepository));
 
+            foreach (var elem in Enum.GetValues(typeof(ProductType)))
+            {
+                comboBoxProdctType.Items.Add(elem);
+            }
+
         }
 
         private void buttonSave_Click(object sender, EventArgs e)
         {
             try
             {
+                ProductType productType = ProductType.None;
+                if (comboBoxProdctType.SelectedItem != null)
+                {
+                    productType = (ProductType)Enum.Parse(typeof(ProductType), comboBoxProdctType.SelectedItem.ToString());
+                }
+                else
+                {
+                    throw new Exception("Не выбран тип продукта");
+                }
                 if (numericUpDownNumOfPairs.Value < 0)
                 {
                     throw new Exception("Имеются незаполненные поля");
                 }
                 _receiptRepository.CreateReceipt(Receipt.CreateOperation(
                 0,
-                (int)comboBox1.SelectedValue!,
+                productType,
                 Convert.ToInt32(numericUpDownNumOfPairs.Value)));
                 Close();
+
             }
             catch (Exception ex)
             {

ShoeStore/Forms/FormSale.cs

@@ -25,6 +25,7 @@ public partial class FormSale : Form
         ColumnProduct.DataSource = productRepository.ReadProducts();
         ColumnProduct.DisplayMember = "NameOfShoes";
         ColumnProduct.ValueMember = "Id";
+
     }
 
     private void ButtonSave_Click_1(object sender, EventArgs e)

ShoeStore/Repositories/Implementations/ReceiptRepository.cs

@@ -33,8 +33,8 @@ public class ReceiptRepository : IReceiptRepository
         try
         {
             using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
-            var queryInsert = @"INSERT INTO Receipts (ProductType, NumberOfPairsReceived, Date) 
+            var queryInsert = @"INSERT INTO Receipts (ProductType, NumberOfPairsReceived, DateOfReceipt) 
-                                VALUES (@ProductType, @NumberOfPairsReceived, @Date)";
+                                VALUES (@ProductType, @NumberOfPairsReceived, @DateOfReceipt)";
             connection.Execute(queryInsert, receipt);
         }
         catch (Exception ex)

ShoeStore/Repositories/Implementations/SaleRepository.cs

@@ -35,8 +35,8 @@ public class SaleRepository : ISaleRepository
             connection.Open();
             using var transaction = connection.BeginTransaction();
             var queryInsert = @"
-                INSERT INTO Sales (SalesNumber, Date)
+                INSERT INTO Sales (SalesNumber, DateOfSale)
-                VALUES (@SalesNumber, @Date);
+                VALUES (@SalesNumber, @DateOfSale);
                 SELECT MAX(Id) FROM Sales";
             var visitingId = connection.QueryFirst<int>(queryInsert, sale, transaction);
             var querySubInsert = @"