Question

我正在尝试更新CART。当我在搜索它时，它失败了。它使用了GUID，因为用户没有登录。我不知道是否必须重新更新DBEntities？不确定。

我收到此错误：The specified type member 'CartId' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported.

由于

ShoppingCart.cs

 namespace Tp1WebStore3.Models
 {
     public partial class ShoppingCart
     {
         Tp1WebStoreDBEntities db = new Tp1WebStoreDBEntities();

         string ShoppingCartId { get; set; }

         public const string CartSessionKey = "CartId";

         public static ShoppingCart GetCart(HttpContextBase context)
         {
             var cart = new ShoppingCart();
             cart.ShoppingCartId = cart.GetCartId(context);
             return cart;
         }

         // Helper method to simplify shopping cart calls
         public static ShoppingCart GetCart(Controller controller)
         {
             return GetCart(controller.HttpContext);
         }

         public void AddToCart(Produit produit)
         {
             // Get the matching cart and album instances
             var cartItem = db.Paniers.SingleOrDefault(
                 c => c.CartId == ShoppingCartId &&
                      c.ProduitId == produit.ProduitId);   <== the error happen here

Panier.cs

 namespace Tp1WebStore3.Models
 {
     using System;
     using System.Collections.Generic;

     public partial class Panier
     {
         public int PanierId { get; set; }
         public string CartId { get; set; }
         public int ProduitId { get; set; }
         public int Quantite { get; set; }
         public decimal Prix { get; set; }

         public System.DateTime DateCree { get; set; }

         public virtual Produit Produit { get; set; }
     }
  }

produit.cs

 namespace Tp1WebStore3.Models
 {
     using System;
     using System.Collections.Generic;

     public partial class Produit
     {
         public Produit()
         {
             this.Paniers = new HashSet<Panier>();
         }

         public int ProduitId { get; set; }
         public int CategorieId { get; set; }
         public string Description { get; set; }
         public int Quantite { get; set; }
         public decimal Prix { get; set; }

         public virtual Categorie Categorie { get; set; }
         public virtual ICollection<Panier> Paniers { get; set; }
     }
 }

Answer 1

如果您更改了数据库中的内容，则必须更新数据模型。右键单击实体图所在的.edmx文件，然后单击“从db更新模型”

Linq to Entities以任何方式只重新生成变化？

1 个答案: