asp.net mvc 使用linq登录并且判断登录的想法

就用默认的框架...

Index.aspx代码如下

<div>
    <form action="/home/login" method="post">
        name：<input id="name" name="name" type="text" /><br /><br />
        pass：<input id="pass" name="pass" type="text" /><br /><br />
       
        <input type="submit" value="Save" />
    </form>
</div>

在HomeController.cs中键入以下代码

 [HandleError]
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            Session["w"] = null;//session写入空值

          
            return View();
        }

        public ActionResult About()
        {
            ViewData["Title"] = "About Page";
            if (Session["w"] != null) //判断是否登录
            {
                return View();
            }
            else
            {
                return View("index");
            }
        }
        public ActionResult login()
        {
            string name = Request.Form["name"].Trim();//取得用户名
            string pass = Request.Form["pass"]Trim();//取得密码

            LinqDataContext db = new LinqDataContext();//数据库上下文
            var a = from b in db.user
                    where b.name == name && b.pass == pass//判断是否存在用户
                    select b;
            if (a.Count() ==1)//如果有一个正确值就写入session并且到about
            {
                Session["w"] = name;
                return View("About");
            }
            else
            {
                return View("Index");//错误就返回到index
            }
        }
    }
}