sepette olan bir ürünü tekrar eklenmesi engellendi.

src/WebApp/AspnetRunBasics/Pages/Index.cshtml.cs

@@ -34,17 +34,19 @@ public async Task<IActionResult> OnPostAddToCartAsync(string productId)
  var userName = "swn";
  var basket = await _basketApi.GetBasket(userName);
 
- basket.Items.Add(new BasketItemModel
+ if (basket.Items.FindAll(i => i.ProductId == productId).Count == 0)
  {
- ProductId = productId,
- ProductName = product.Name,
- Price = product.Price,
- Quantity = 1,
- Color = "Black"
- });
-
- var basketUpdated = await _basketApi.UpdateBasket(basket);
-
+ basket.Items.Add(new BasketItemModel
+ {
+ ProductId = productId,
+ ProductName = product.Name,
+ Price = product.Price,
+ Quantity = 1,
+ Color = "Black"
+ });
+
+ var basketUpdated = await _basketApi.UpdateBasket(basket);
+ }
  return RedirectToPage("Cart");
  }
 

src/WebApp/AspnetRunBasics/Pages/Product.cshtml.cs

@@ -53,16 +53,18 @@ public async Task<IActionResult> OnPostAddToCartAsync(string productId)
  var userName = "swn";
  var basket = await _basketApi.GetBasket(userName);
 
- basket.Items.Add(new BasketItemModel
+ if (basket.Items.FindAll(i => i.ProductId == productId).Count == 0)
  {
- ProductId = productId,
- ProductName = product.Name,
- Price = product.Price,
- Quantity = 1,
- Color = "Black"
- });
-
- var basketUpdated = await _basketApi.UpdateBasket(basket);
+ basket.Items.Add(new BasketItemModel
+ {
+ ProductId = productId,
+ ProductName = product.Name,
+ Price = product.Price,
+ Quantity = 1,
+ Color = "Black"
+ });
+ var basketUpdated = await _basketApi.UpdateBasket(basket);
+ }
 
  return RedirectToPage("Cart");
  }