fix

ElectronicsShop/ElectronicsShopDataBaseImplement/DataBase.cs

@@ -12,7 +12,7 @@ namespace ElectronicsShopDataBaseImplement
        optionsBuilder)
         {
 			if (optionsBuilder.IsConfigured == false) {
-				optionsBuilder.UseSqlServer(@"Data Source=DESKTOP-E2VPEN3\SQLEXPRESS;Initial Catalog=ElectronicsShopDatabase;Integrated Security=True;MultipleActiveResultSets=True;;TrustServerCertificate=True");
+				optionsBuilder.UseSqlServer(@"Data Source=DESKTOP-O0N00SH\SQLEXPRESS;Initial Catalog=ElectronicsShopDatabase;Integrated Security=True;MultipleActiveResultSets=True;;TrustServerCertificate=True");
 			}
 			base.OnConfiguring(optionsBuilder);
 		}

ElectronicsShop/ElectronicsShopDataBaseImplement/Models/Order.cs

@@ -86,7 +86,7 @@ namespace ElectronicsShopDataBaseImplement.Models
                 }
                 context.SaveChanges();
             }
-            var order = context.Orders.First(x => x.ID == model.ID);
+            var order = context.Orders.FirstOrDefault(x => x.ID == model.ID);
             order.Sum = model.Sum;
             foreach (var op in model.ProductList) {
                 context.OrderProducts.Add(new OrderProduct {

ElectronicsShop/ElectronicsShopShopClientApp/Controllers/HomeController.cs

@@ -135,7 +135,7 @@ namespace ElectronicsShopUserApp.Controllers {
 			}
 
             if (id == 0) {
-                return Redirect("Orders");
+                return RedirectToAction("Orders");
             }
 			var products = APIClient.GetRequset<List<List<string>>>($"api/main/getorderproducts?_orderid={id}");
 

ElectronicsShop/ElectronicsShopShopClientApp/Views/Home/EditOrder.cshtml

@@ -43,7 +43,7 @@
 						Количество
 					</th>
 					<th>
-						Сумма
+						Цена за единицу товара
 					</th>
 				</tr>
 			</thead>

ElectronicsShop/ElectronicsShopShopClientApp/Views/Home/OrderView.cshtml

@@ -43,7 +43,7 @@
 						Количество
 					</th>
 					<th>
-						Сумма
+						Цена за единицу товара
 					</th>
 				</tr>
 			</thead>