.NET MVC中登陆授权过滤器的使用

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");
            }
        }
    }
}

    　　[LoginAuthority]
        public ActionResult Logout()
        {
            HttpContext.Session[App_Start.GlobalConfig.LoginedUserSessionKey] = null;
            return RedirectToAction("Login");
        }