MVC4制作网站教程第二章 用户登陆2.2


            一用户 

1.1用户注册 

1.2用户登陆 



首先在Models里添加用户登陆模型类UserLogin，该类只要用用户名，密码和验证码三个字段。 





/// <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; }



 }







在UserController里添加Login action； 代码看如下：







public ActionResult Login()

 {

  return View();

 }

 [HttpPost]

 public ActionResult Login(UserLogin login)

 {

  return View();

 }







使用Cookie保存登陆账号，密码等信息，修改public ActionResult Login(UserLogin login)。修改完成代码如下：







[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();

  }



 }







在public ActionResult Login() 上右键添加强类型视图





完成后代的Login.cshtml 





@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") 

}







浏览器中查看一下登陆页面





点下登陆测试一下。OK登陆成功 



验证用户是否已经登陆，这块和权限验证一起从AuthorizeAttribute继承个自定义验证类 



在项目里添加Extensions文件夹，添加一个类UserAuthorizeAttribute 继承自AuthorizeAttribute，重写AuthorizeCore方法用来实现用户是否已经登陆的验证，权限验证在写权限功能时在补充 





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;

 }

 }

}







以后只要在需要登陆后才能操作的Action或Controller上加[UserAuthorize]就可实现验证是否已经登录了。

退出功能，在UserController添加Logout Action 





/// <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);

 }





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