Question

我假设我错过了在控制器顶部声明的命名空间，但我尝试使用'using WebMatrix.Data;'和'使用System.IO;'他们是这个错误的通常建议。它没用。

我正在尝试在同一视图中显示多个数据库表，而这个错误阻止了我。请帮助。

我的控制器：

using System.Linq; 
using System.Web.Mvc; 
using KMS.Models; 
using WebMatrix.Data; 
using System.IO;


namespace KMS.Controllers
 {

public class KMSController : Controller{
    public ActionResult Index()
    {
        KMSConection cs = new KMSConection();
        cs.Areas = (from o in db.Areas select o).Tolist();
        cs.AreaTypes = (from o in db.AreaTypes select or).Tolist();
        return View(cs);
    }
  }
}

我的ViewModel类：

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

 namespace KMS.Models
 {
  public class KMSConection: ApplicationDbContext
  {
    public DbSet<Area> Areas { get; set; }
    public DbSet<AreaType> AreaTypes { get; set; }
  }
}

谢谢！

Answer 1

因为您没有提到您在KMSController中创建的db变量。尝试使用此代码来修复错误：

using System.Linq; 
using System.Web.Mvc; 
using KMS.Models; 
using WebMatrix.Data; 
using System.IO;


namespace KMS.Controllers
 {

public class KMSController : Controller{
    public ActionResult Index()
    {
        //Insert the actual entity referred to your db variable. 
        //Probably something like:
        //var db = Some Database Context

        KMSConection cs = new KMSConection();
        cs.Areas = (from o in db.Areas select o).Tolist();
        cs.AreaTypes = (from o in db.AreaTypes select or).Tolist();
        return View(cs);
    }
  }
}

错误CS0103当前上下文中不存在名称“db”

1 个答案: