MVC权限验证过滤器

　　[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
    public class SuperICAuthorizeAttribute : AuthorizeAttribute
    {
        public string[] ActionPowers { get; set; }
 
        public override void OnAuthorization(System.Web.Mvc.AuthorizationContext filterContext)
        {
            string controllerName = filterContext.ActionDescriptor.ControllerDescriptor.ControllerName;
            string actionName = filterContext.ActionDescriptor.ActionName;
            object[] attributes = filterContext.ActionDescriptor.GetCustomAttributes(typeof(PurviewEnumAttribute), true);
            if (attributes != null && attributes.Count() > 0)
            {
                string power = (attributes[0] as PurviewEnumAttribute).PurviewString;
                this.ActionPowers = power.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries);
            }
            base.OnAuthorization(filterContext);
        }
 
        protected override bool AuthorizeCore(HttpContextBase httpContext)
        {
            if (httpContext == null)
            {
                return false;
            }
            if (ActionPowers == null)
            {
                return true;
            }
            if (ActionPowers.Length == 0)
            {
                return true;
            }
            // if (ActionPowers.Any(httpContext.User.IsInRole))  
            if (ActionPowers.Any((new string[]{"1","2","3","4"}).Contains))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    } 

[PurviewEnum("2")]
[SuperICAuthorize]
public ActionResult Index()