/// <summary>
        ///
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static IHttpHandler TryGetHttp404PageHandler(HttpContext context)
        {
            // 当诊断模式启用时,优先选择直接返回Http404PageHandler的方式,避免进入错误解析模式。

            DiagnoseResult diagnoseResult = TryGetDiagnoseResult(context);

            if (diagnoseResult != null)
            {
                if (diagnoseResult.AssemblyList == null)
                {
                    ControllerRecognizer recognizer = ObjectFactory.New <ControllerRecognizer>();
                    List <Assembly>      list       = recognizer.GetControllerAssembly();
                    diagnoseResult.AssemblyList = (from a in list select a.FullName).ToList();
                }

                diagnoseResult.UrlActionInfo = context.Items[UrlActionInfo.HttpContextItemKey] as UrlActionInfo;

                //diagnoseResult.ErrorMessages.Add("不能根据当前URL创建请求处理器,当前URL:" + context.Request.RawUrl);

                return(new Http404PageHandler(diagnoseResult));
            }
            else
            {
                return(null);
            }
        }
 internal Http404PageHandler(DiagnoseResult diagnoseResult)
 {
     DiagnoseResult = diagnoseResult;
 }