asp.net - 错误 1 ​​找不到类型或命名空间名称 'Controller'(您是否缺少 using 指令或程序集引用？)

Question

当我尝试在 asp.net mvc3 中构建项目时。出现27个错误，说mvc相关类不存在:

这是一个例子:

Error   1   The type or namespace name 'Controller' could not be found (are you missing a using directive or an assembly reference?)    C:\Documents and Settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication1\MvcApplication1\Controllers\HomeController.cs   10  35  MvcApplication1

更新

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

namespace MvcApplication2.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.Message = "Welcome to ASP.NET MVC!";

            return View();
        }

        public ActionResult About()
        {
            return View();
        }
    }
}

错误:

Error   1   The type or namespace name 'Controller' could not be found (are you missing a using directive or an assembly reference?)    c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   9   35  MvcApplication2

Error   2   The type or namespace name 'ActionResult' could not be found (are you missing a using directive or an assembly reference?)  c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   11  16  MvcApplication2


Error   3   The name 'ViewBag' does not exist in the current context    c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   13  13  MvcApplication2


Error   4   The name 'View' does not exist in the current context   c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   15  20  MvcApplication2


Error   5   The type or namespace name 'ActionResult' could not be found (are you missing a using directive or an assembly reference?)  c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   18  16  MvcApplication2


Error   6   The name 'View' does not exist in the current context   c:\documents and settings\hhhhhhhh\my documents\visual studio 2010\Projects\MvcApplication2\MvcApplication2\Controllers\HomeController.cs   20  20  MvcApplication2

Answer 1

您需要添加 System.Web.Mvc到您的项目引用。

右键单击引用文献

单击“添加引用...”

组件 > 框架

在 中搜索程序集 (Ctrl+E) System.Web.Mvc (你可能会有更多:版本 2/3/4)