MVC 自定义属性验证登录

public class BaseFilterAttribute : FilterAttribute, IAuthorizationFilter
    {
        /// <summary>
        /// 自定义扩展属性，验证用户登录
        /// </summary>
        /// <param name="filterContext">AuthorizationContext 类将封装有关控制器、HTTP 上下文、请求上下文、路由数据、操作描述符和操作结果的信息。</param>
        public void OnAuthorization(AuthorizationContext filterContext)
        {

            if (filterContext.HttpContext == null)
            {
                throw new Exception("HTTP 上下文不存在！");
            }

            if (filterContext.HttpContext.Session == null)
            {
                throw new Exception("服务器Session不可用！");
            }

            if (filterContext.ActionDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true)) return;
            if (filterContext.HttpContext.Session[ConfigHelper.SessionCookieKey] != null) return;

            //if(filterContext.HttpContext.Request.Cookies[ConfigHelper.SessionCookieKey]==null)
            //    filterContext.Result = new RedirectResult("~/Views/Account/Login.cshtml");

            if (CookiesHelper.GetCookie(ConfigHelper.SessionCookieKey) == null)
                filterContext.Result = new RedirectResult(ConfigHelper.SessionCookieReturnUrl);

        }
    }

[BaseFilter]
    public class PreListController : BaseController
    {
    }

        [AllowAnonymous]
        public ActionResult Login()
        {
            return View();
        }