/// summary>
 /// 用户登陆模型
 /// /summary>
 public class UserLogin
 {
 /// summary>
 /// 用户名
 /// /summary>
 [Display(Name = "用户名", Description = "4-20个字符。")]
 [Required(ErrorMessage = "×")]
 [StringLength(20, MinimumLength = 4, ErrorMessage = "×")]
 public string UserName { get; set; }
 /// summary>
 /// 密码
 /// /summary>
 [Display(Name = "密码", Description = "6-20个字符。")]
 [Required(ErrorMessage = "×")]
 [StringLength(20, MinimumLength = 6, ErrorMessage = "×")]
 [DataType(DataType.Password)]
 public string Password { get; set; }
 /// summary>
 /// 验证码
 /// /summary>
 [Display(Name = "验证码", Description = "请输入图片中的验证码。")]
 [Required(ErrorMessage = "×")]
 [StringLength(6, MinimumLength = 6, ErrorMessage = "×")]
 public string VerificationCode { get; set; }

 }

public ActionResult Login()
 {
  return View();
 }
 [HttpPost]
 public ActionResult Login(UserLogin login)
 {
  return View();
 }

[HttpPost]
 public ActionResult Login(UserLogin login)
 {
  //验证验证码
  if (Session["VerificationCode"] == null || Session["VerificationCode"].ToString() == "")
  {
  Error _e = new Error { Title = "验证码不存在", Details = "在用户注册时，服务器端的验证码为空，或向服务器提交的验证码为空", Cause = "li>你注册时在注册页面停留的时间过久页已经超时/li>li>您绕开客户端验证向服务器提交数据/li>", Solution = "返回a href='" + Url.Action("Register", "User") + "'>注册/a>页面，刷新后重新注册" };
  return RedirectToAction("Error", "Prompt", _e);
  }
  else if (Session["VerificationCode"].ToString() != login.VerificationCode.ToUpper())
  {
  ModelState.AddModelError("VerificationCode", "×");
  return View();
  }
  //验证账号密码
  userRsy = new UserRepository();
  if (userRsy.Authentication(login.UserName, Common.Text.Sha256(login.Password)) == 0)
  {
  HttpCookie _cookie = new HttpCookie("User");
  _cookie.Values.Add("UserName", login.UserName);
  _cookie.Values.Add("Password", Common.Text.Sha256(login.Password));
  Response.Cookies.Add(_cookie);
  return RedirectToAction("Default","User");
  }
  else
  {
  ModelState.AddModelError("Message", "登陆失败！");
  return View();
  }

 }

@model CMS.Models.UserLogin

@{
 ViewBag.Title = "用户登陆";
 Layout = "~/Views/Shared/_Layout.cshtml";
}
 
div class="banner"> 
 img src="~/Skins/Default/Images/banner.jpg" /> 
/div>
 

@using (Html.BeginForm()) 
{ 
 @Html.ValidationSummary(true)

 div class="form"> 
 dl> 
  dt>用户登陆/dt> 
  dd> 
  div class="label">@Html.LabelFor(model => model.UserName)：/div> 
  div class="ctrl">@Html.EditorFor(model => model.UserName) 
   @Html.ValidationMessageFor(model => model.UserName) 
   @Html.DisplayDescriptionFor(model => model.UserName) 
  /div> 
  /dd> 
  dd> 
  div class="label">@Html.LabelFor(model => model.Password)：/div> 
  div class="ctrl">@Html.PasswordFor(model => model.Password) 
   @Html.ValidationMessageFor(model => model.Password) 
   @Html.DisplayDescriptionFor(model => model.Password) 
  /div> 
  /dd> 
  dd> 
  div class="label">验证码：/div> 
  div class="ctrl">
   @Html.TextBoxFor(model => model.VerificationCode) 
   @Html.ValidationMessageFor(model => model.VerificationCode) 
   img id="verificationcode" alt="" src="@Url.Action("VerificationCode", "User")" /> 
   a id="trydifferent" style="cursor: pointer">换一张/a> 
  /div> 
  /dd> 
  dd> 
  div class="label">/div> 
  div class="ctrl"> 
   input type="submit" value="登陆" />@Html.ValidationMessage("Message"); 
  /div> 
  /dd> 
 /dl> 
 div class="clear">/div> 
 /div>
}

script type="text/javascript">
 $("#trydifferent").click(function () { 
 $("#verificationcode").attr("src", "/User/VerificationCode?" + new Date()); 
 })

/script>
@section Scripts { 
 @Scripts.Render("~/bundles/jqueryval") 
}

using Ninesky.Repository;

namespace System.Web.Mvc
{
 /// summary>
 /// 用户权限验证
 /// /summary>
 public class UserAuthorizeAttribute :AuthorizeAttribute
 {
 /// summary>
 /// 核心【验证用户是否登陆】
 /// /summary>
 /// param name="httpContext">/param>
 /// returns>/returns>
 protected override bool AuthorizeCore(HttpContextBase httpContext)
 {
  //检查Cookies["User"]是否存在
  if (httpContext.Request.Cookies["User"] == null) return false;
  //验证用户名密码是否正确
  HttpCookie _cookie = httpContext.Request.Cookies["User"];
  string _userName = _cookie["UserName"];
  string _password = _cookie["Password"];
  httpContext.Response.Write("用户名:"+_userName);
  if (_userName == "" || _password == "") return false;
  UserRepository _userRsy = new UserRepository();
  if (_userRsy.Authentication(_userName, _password) == 0) return true;
  else return false;
 }
 }
}

/// summary>
 /// 退出系统
 /// /summary>
 /// returns>/returns>
 public ActionResult Logout()
 {
  if (Request.Cookies["User"] != null)
  {
  HttpCookie _cookie = Request.Cookies["User"];
  _cookie.Expires = DateTime.Now.AddHours(-1);
  Response.Cookies.Add(_cookie);
  }
  Notice _n = new Notice { Title = "成功退出", Details = "您已经成功退出！", DwellTime = 5, NavigationName="网站首页", NavigationUrl = Url.Action("Index", "Home") };
  return RedirectToAction("Notice", "Prompt", _n);
 }