Question

我正在开发一个关于运行程序的MVC项目我尝试从我的SqlServer数据库中检索数据时遇到错误。

控制器：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Activity.Models;

namespace Activity.Controllers
{
     public class ProductsController : Controller
    {
        public ActionResult ProductDetails(int id)
        {
            ProductContext productsContext = new ProductContext();
            Products prod = productsContext.Product.Single(pru => pru.ProductKey == id);

            return View(prod);
        }

    }
}

模型：我有两个类（Products.cs和ProductContext.cs）

适用于ProductContext.cs

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

namespace Activity.Models
{
    public class ProductContext : DbContext
    {
        public DbSet<Products> Product { get; set; }
    }
}

对于Products.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Web;

namespace Activity.Models
{

    [Table("PruProductDetails")]
    public class Products
    {
        public int ProductKey { get; set; }
        public string ProductCode { get; set; }
        public string ProductName { get; set; }
        public double Price { get; set; }
        public string Discountable { get; set; }
        public string DateAdded { get; set; }
        public double Discount { get; set; }
        public int Quantity { get; set; }
        public int ReOrderLevel { get; set; }
        public int OrderLimit { get; set; }
    }
}

的Web.Config

<connectionStrings>
    <add name="ProductContext"
         connectionString="server=(local); database=Exam; integrated security=SSPI"
          providerName="System.Data.SqlClient"/>
   </connectionStrings>

Global.asax中

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Routing;

namespace Activity
{

    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            Database.SetInitializer<Activity.Models.ProductContext>(null);
            AreaRegistration.RegisterAllAreas();
            WebApiConfig.Register(GlobalConfiguration.Configuration);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
        }
    }
 }

我希望有人可以帮助我。我只是MVC的初学者。谢谢

Answer 1

尝试像这样修改Products类 - 为ProductKey添加Key属性

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Web;

namespace Activity.Models
{

[Table("PruProductDetails")]
public class Products
{
    [Key]
    public int ProductKey { get; set; }
    public string ProductCode { get; set; }
    public string ProductName { get; set; }
    public double Price { get; set; }
    public string Discountable { get; set; }
    public string DateAdded { get; set; }
    public double Discount { get; set; }
    public int Quantity { get; set; }
    public int ReOrderLevel { get; set; }
    public int OrderLimit { get; set; }
}

}

Answer 2

我也有同样的错误解决方案非常简单，您的属性名称应与sql server列以及更重要的语法相匹配：更重要的写作语法：

public ActionResult Details(int id) {
  EmployeeContext employeecontext = new EmployeeContext();
  Employee employee = employeecontext.Employees.Single(emp => emp.Employeeid == id);
  return View(employee);


  public ActionResult Details(int id)
        {
            EmployeeContext employeecontext = new EmployeeContext();
            Employee employee = employeecontext.Employees.Single(emp => emp.Employeeid == id);

            return View(employee);
        }

如果要编写任何变量而不是int id，则必须编写int id的以下代码，否则会出现错误，我希望此错误的解决方案会有所帮助

＆＃39; System.Data.Entity.ModelConfiguration.ModelValidationException＆＃39;发生在EntityFramework.dll中但未在用户代码

2 个答案: