mvc 5 中的异常，模型未在视图中传递数据

Question

  public ActionResult CustomerOrders()
    {
        string cookieName = FormsAuthentication.FormsCookieName; //Find cookie name
        HttpCookie authCookie = HttpContext.Request.Cookies[cookieName]; //Get the cookie by it's name
        FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(authCookie.Value); //Decrypt it
        string UserName = ticket.Name;
        int UserID = context.Registers.Where(x => x.name == UserName).Select(x => x.id).FirstOrDefault();

       var data = (from i in context.Registers.Where(x => x.id == UserID)
                             join
                              c in context.Orders on i.id equals c.customer_id
                             into egroup
                             from k in egroup
                             join p in context.Products
                             on k.product_id equals p.product_id
                             select new
                             {
                                 p.price,
                                 // k.order_total,
                                 p.ImageUrl,
                                 p.ProductName

                             }).ToList() ;
        Products pr = new Products();

        return View(data);
       // return View(data);
    }

传入字典的模型项的类型为'System.Collections.Generic.List1[<>f__AnonymousType33[System.Nullable1[System.Int32],System.String,System.String]]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable1[PetsApplication.Models.Products]

Answer 1

错误消息不言自明！在您的 LINQ 表达式中，您将结果投影到匿名对象列表并将其传递给视图。但是您的视图被强类型化为 Products class.

的集合

将您的匿名对象投影更改为使用 Product class 的投影。

var data = (from i in context.Registers.Where(x => x.id == UserID)
            join c in context.Orders on i.id equals c.customer_id
            into egroup
            from k in egroup
            join p in context.Products
            on k.product_id equals p.product_id
            select new Products
            {
                price=p.price,                   
                ImageUrl=p.ImageUrl,
                ProductName=p.ProductName

            }).ToList();
 return View(data);

Answer 2

您的视图是强类型的，并且您正在传递匿名类型创建一个 class 列表项，然后将其用作视图模型以将数据传递给视图。

mvc 5 中的异常，模型未在视图中传递数据

exception in mvc 5, model is not passing data in view

c#

asp.net-mvc

linq-to-entities

entity-framework