public HttpResponseBase GetVipLevel()
        {
            DataTable _dt = new DataTable();
            string json = string.Empty;
            try
            {
                _memberMgr = new MemberLevelMgr(mySqlConnectionString);
                _dt = _memberMgr.GetLevel();
                VipUserGroup Dmodel = new VipUserGroup();
                json = "{success:true,data:" + JsonConvert.SerializeObject(_dt) + "}";//返回json數據

            }
            catch (Exception ex)
            {
                Log4NetCustom.LogMessage logMessage = new Log4NetCustom.LogMessage();
                logMessage.Content = string.Format("TargetSite:{0},Source:{1},Message:{2}", ex.TargetSite.Name, ex.Source, ex.Message);
                logMessage.MethodName = System.Reflection.MethodBase.GetCurrentMethod().Name;
                log.Error(logMessage);
                json = "{success:true,totalCount:0,data:[]}";
            }
            this.Response.Clear();
            this.Response.Write(json);
            this.Response.End();
            return this.Response;
        }