c# – EntitySet’Department’基于没有定义键的’Admin’类型

deptID(主键),deptName,描述：all是Department表的列名.

desgID(主键),desgName,description：all是Designation表的列名.

目标： – 我想在视图页面上创建一个deptName或desgName对话框,但现在我想解决这些问题.

我指的是这些链接： –
EntityType ‘Category’ has no key defined. Define the key for this EntityType

ASP.NET MVC 3 EntityType has no key defined

但根据这些联系.我试图在我的主键列中使用[Key],但在mvc5中没有提示.

型号：

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

namespace mvcAppraisalSystem.Models
{
  public class Admin
 {
    public int deptID { get; set; }
    public string deptName { get; set; }
    public string Description { get; set; }
    public int desgID { get; set; }
    public string desgName { get; set; }
    public string description { get; set; }
}

 public class AdminDBContext : DbContext
 {
    public DbSet<Admin> Department { get; set; }

    public DbSet<Admin> Designation { get; set; }
 }
}