static string GetAppSetting(string key)        {            var appSetting = ConfigurationManager.AppSettings[key];            if (string.IsNullOrEmpty(appSetting))            {                return string.Format("未配置节点" + key);            }            return appSetting;        }        public static string JsonServiceUrl(string key)        {            return GetAppSetting(key);        }

//var url = Configurator.JsonServiceUrl("DownFile");var apiMethodName = request.QueryString[apiMethodKey];var apiBaseUrl = Configurator.GetConfigValue("memberDomain");var apiUrl = string.Format(apiBaseUrl, apiMethodName);