1、写个类LoginAuthorityAttribute，继承自AuthorizeAttribute
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;namespace PowerBIDocs.Web.Utils{ ???public class LoginAuthorityAttribute : AuthorizeAttribute ???{ ???????public override void OnAuthorization(AuthorizationContext filterContext) ???????{ ???????????if (App_Start.GlobalConfig.LoginedUser == null) ???????????{ ???????????????filterContext.HttpContext.Response.Redirect("~/Home/Login"); ???????????} ???????} ???}}2、在所有需要登陆才能访问的控制器中的方法上面，标注： [LoginAuthority]
??? [LoginAuthority] ???????public ActionResult Logout() ???????{ ???????????HttpContext.Session[App_Start.GlobalConfig.LoginedUserSessionKey] = null; ???????????return RedirectToAction("Login"); ???????}3、说明：上面的例子中，用户信息存在于SESSION中。
.NET MVC中登陆授权过滤器的使用
原文地址：http://www.cnblogs.com/songxingzhu/p/7991287.html