protected override void OnActionExecuting(ActionExecutingContext filterContext)

        {

             if (Request.Cookies["manage"] == null)

                {  
　　　　　　　　　　　　//重置路由吧算是

                    filterContext.Result = RedirectToRoute("default", new { Controller = "Land", Action = "Index" });

 　　　　　　　　 }

                base.OnActionExecuting(filterContext);

        }

filterContext.HttpContext.Response.Redirect("")

//只需要加上

filterContext.Result = new HttpUnauthorizedResult()

//或者

filterContext.Result = new EmptyResult()

//filter验证不通过就不会执行action了，