登陆与注册以及Session

Session 保存状态是在登陆窗口检查用户密码的动作上执行
1、Models
namespace 注册与登陆以及Session.Models
{
    public class UserBF
    {
        private MyDBDataContext _context = new MyDBDataContext();
        public bool Select(string username,string password) //验证用户名和密码是否正确(登陆)
        {
            var query = _context.logins.Where(P=>P.UserName==username&&P.PassWord==password);
            return query.Count() > 0;         
        }

        public void Insert(string UserName,string PassWord ) //注册
        {
            logins lo = new logins();
            lo.UserName = UserName;
            lo.PassWord = PassWord;
            _context.logins.InsertOnSubmit(lo);
            _context.SubmitChanges();
        }
    }
}

2、Controllers
namespace 注册与登陆以及Session.Controllers
{
    public class HomeController : Controller
    {
   

        public ActionResult Index()
        {
            return View();
        }
        public ActionResult Check(string username,string password) //登陆
        {
            bool isok= new UserBF().Select(username,password);
            if(isok)
            {
                
                //保存状态
            Session["user"] = username; //记录一下会话（登录状态）

                //跳转页面
            return RedirectToAction("Html","Home");        
            }
            else
            {
                return RedirectToAction("Index");
            }

        }
        public ActionResult Html() //登陆后的主页面
        {
            if (Session["user"] == null)
            {
                return RedirectToAction("Index", "Home");
            }
            return View();
        }
        public ActionResult Login() //注册编辑动作
        { 
            if (Session["user"] == null)
            {
                return RedirectToAction("Index", "Home");
            }
            return View();
        }
        public ActionResult Insert(string username,string password)//注册动作
        {
            if (Session["user"] == null)
            {
                return RedirectToAction("Index", "Home");
            }
            new UserBF().Insert(username,password);
            return RedirectToAction("Index");
        }
    }
}


3、Views
Index：登陆界面
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <style>
        .aa
         {
            position:relative;
            margin:auto;
            400px;
            height:400px;
           
        }
        </style>
</head>
<body>
  
        @using(Html.BeginForm("Check","Home"))
        {  
            <div class="aa">
        用户名: @Html.TextBox("username","")<br>
        密   码: &nbsp;@Html.Password("password","")<br>
            <input id="Submit1" type="submit" value="登陆" />
            <a href="/Home/Login"><input id="Button1" type="button" value="注册" /></a>
               </div>
        }
 
</body>
</html>



Login：注册页面
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Login</title>
     <style>
        .aa
         {
            position:relative;
            margin:auto;
            400px;
            height:400px;
           
        }
        </style>
</head>
<body>
    @using(Html.BeginForm("Insert","Home"))
    {
    <div class="aa">
            用户名   ：  &nbsp;@Html.TextBox("username","")<br>
            密   码   ：   &nbsp;&nbsp;@Html.Password("password","")<br>
            确认密码：  @Html.Password("passwordagain","")<br>
        <input id="Submit1" type="submit" value="注册" />
    </div>
    }
</body>
</html>



Html：登陆后的主页面
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Html</title>
</head>
<body>
    <div>
         这是登陆后的页面 欢迎您： @Session["user"]
    </div>
</body>
</html>
效果图：