1、创建一个控制器   如下:

using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.web.mvc;
using demo.models;    //命名空间

namespace demo.controllers
{
    public class homecontroller : controller
    {
        //
        // get: /home/
        dl_demoentities db = new dl_demoentities();   //模型

        public actionresult index()  //首页
        {
            return view();
        }
        public actionresult demo404()  //登陆失败跳转
        {
            return view();
        }
        public actionresult start_here()  //登陆成功跳转
        {
            return view();
        }
        [httppost]
        public actionresult login(string name, string password) 
        {
             name = request["name"];
             password = request["password"];
            if (string .isnullorempty(name)||string .isnullorempty(password))
            {
                return content("<script>alert('账号密码不能为空');location.href='demo404'</script>");
                
            }
            else
            {
                var user = db.user.where(u => u.admin == name && u.passid == password).singleordefault();
                if (user == null)
                {
                    return content("<script>alert('输入有误');location.href='demo404'</script>");

                }
                else
                {
                    return content("<script>location.href='start_here'</script>");
//登录成功跳转 } } } } }

2、视图界面

<body style="background:url(html/images/bg.jpg) no-repeat;">
    <form action="/home/login" method="post">
        
 <div class="container wrap1" style="height:450px;">
            <h2 class="mg-b20 text-center">单木不林后台登录页面</h2>
            <div class="col-sm-8 col-md-5 center-auto pd-sm-50 pd-xs-20 main_content">
                <p class="text-center font16">用户登录</p>
                <form>
                    <div class="form-group mg-t20">
                        <i class="icon-user icon_font"></i>
                        <input type="text" class="login_input" id="email1" name="name" placeholder="请输入用户名" />
                    </div>
                    <div class="form-group mg-t20">
                        <i class="icon-lock icon_font"></i>
                        <input type="password" class="login_input" id="password1" name="password" placeholder="请输入密码" />
                    </div>
                    <div class="checkbox mg-b25">
                        <label>
                            <input type="checkbox" />记住我的登录信息
                        </label>
                    </div>
                    <button type="submit" class="login_btn">登 录</button>
               </form>
        </div><!--row end-->
    </div><!--container end-->
    </form>
   
   
</body>

  

抱歉第一次写博客   感觉有点说不清的感觉….