public class MyAuthorizeAttribute : AuthorizeAttribute     {        protected override bool AuthorizeCore(HttpContextBase httpContext)         {            //return base.AuthorizeCore(httpContext);             return DateTime.Now.Minute % 2 == 0         }        protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)         {             filterContext.HttpContext.Response.Redirect("/Customer/Login");            //base.HandleUnauthorizedRequest(filterContext);        }     }用asp.net mvc的方法好象不行啊。指點一下唄