MVC过滤器

public class MyCustomerFilterAttribute : ActionFilterAttribute
    {
        public string Message { get; set; }

        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
            filterContext.HttpContext.Response.Write(string.Format( "<br/> {0} Action finish Execute.....",Message));
        }

        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            CheckMessage(filterContext);
            filterContext.HttpContext.Response.Write(string.Format("<br/> {0} Action start Execute.....", Message));
            base.OnActionExecuting(filterContext);
        }

        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            filterContext.HttpContext.Response.Write(string.Format("<br/> {0} Action finish Result.....", Message));
            base.OnResultExecuted(filterContext);
        }

        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            filterContext.HttpContext.Response.Write(string.Format("<br/> {0} Action start Execute.....", Message));
            base.OnResultExecuting(filterContext);
        }

        private void CheckMessage(ActionExecutingContext filterContext)
        { 
            if(string.IsNullOrEmpty( Message)||string.IsNullOrWhiteSpace(Message))
                Message = filterContext.Controller.GetType().Name + "'s " + filterContext.ActionDescriptor.ActionName;
        }
    }