public HttpResponseBase GetPromoAmountGift()
        {
            string jsonStr = "{success:false}";

            try
            {
                EventPromoAmountGiftQuery query = new EventPromoAmountGiftQuery();
                query.Start = Convert.ToInt32(Request.Params["start"] ?? "0");
                query.Limit = Convert.ToInt32(Request.Params["limit"] ?? "0");

                if (!string.IsNullOrEmpty(Request.Params["event_id"]))
                {
                    query.event_id = Request.Params["event_id"];
                }
                if (!string.IsNullOrEmpty(Request.Params["event_name"]))
                {
                    query.event_name = Request.Params["event_name"];
                }
                int totalCount = 0;

                iepaGiftMgr = new EventPromoAmountGiftMgr(mySqlConnectionString);
                List<EventPromoAmountGiftQuery> _list = iepaGiftMgr.GetList(query, out totalCount);

                IsoDateTimeConverter timeConverter = new IsoDateTimeConverter();
                //这里使用自定义日期格式,如果不使用的话,默认是ISO8601格式     
                timeConverter.DateTimeFormat = "yyyy-MM-dd HH:mm:ss";
                jsonStr = "{success:true,totalCount:" + totalCount + ",item:" + JsonConvert.SerializeObject(_list, Formatting.Indented, timeConverter) + "}";//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);
            }
            this.Response.Clear();
            this.Response.Write(jsonStr.ToString());
            this.Response.End();
            return this.Response;
        }