MVC Filters

 public class AuthFiltersController : Controller
    {
        //
        // GET: /AuthFilters/

        public ActionResult Index()
        {
            return View();
        }

        [Authorize]
        public ActionResult Welcome()
        {
            return View();
        }
    }

<authentication mode="Forms">
      <forms loginUrl="~/Account/Login" timeout="2880" />
</authentication>

public class AccountController : Controller
    {
        //
        // GET: /Account/

        public ActionResult Index()
        {
            
            return View();
        }

        public ActionResult Login()
        {
            filter.Models.LogOnViewModel mode = new Models.LogOnViewModel();
            return View();
        }

        [HttpPost]
        public ActionResult Login(filter.Models.LogOnViewModel mode)
        {
            if (mode.UserName.Trim() == mode.Password.Trim()) //伪代码，只要输入的用户名和密码一样就过
            {
                if (mode.RememberMe)
                    FormsAuthentication.SetAuthCookie(mode.UserName, true);   //2880分钟有效期的cookie
                else
                    FormsAuthentication.SetAuthCookie(mode.UserName, false);  //会话cookie

                return RedirectToAction("Welcome", "AuthFilters");
            }
            else
                return View(mode);
        }

        public ActionResult Logout()
        {
            Session.Abandon();
            FormsAuthentication.SignOut();
            return RedirectToAction("Login", "Account");
        }
    }

@{
    ViewBag.Title = "Welcome";
}

<h2>Welcome</h2>

@{
    if (Request.IsAuthenticated)
    {
        <text>Hello,</text> @User.Identity.Name <span>
        &nbsp;&nbsp;
        @Html.ActionLink("注销", "Logout", "Account")</span>
    }
}

<p />

@model filter.Models.LogOnViewModel

@{
    ViewBag.Title = "Login";
}

<h2>Login</h2>

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

    <fieldset>
        <legend>LogOnViewModel</legend>

        <div class="editor-label">
            用户名
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.UserName)
        </div>

        <div class="editor-label">
           密码
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Password)
        </div>

        <div class="editor-label">
           记住我
        </div>
        <div class="editor-field">
            @Html.CheckBoxFor(model => model.RememberMe)
        </div>

        <p><input type="submit" value="登录" /></p>

    </fieldset>
}
<div>
    @Html.ActionLink("Back to List", "Index")
</div>

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