public HttpResponseBase DeleteImage()
        {
            string json = string.Empty;
            _promotionBannerMgr = new PromotionBannerMgr(mySqlConnectionString);
            PromotionBannerQuery query = new PromotionBannerQuery();            
             try
             {
                 if (!string.IsNullOrEmpty(Request.Params["ids"]))
                 {
                     foreach (string item in Request.Params["ids"].Split('|'))
                     {
                         if (!string.IsNullOrEmpty(item))
                         {
                             query.pb_id = Convert.ToInt32(item);
                             bool result = _promotionBannerMgr.DeleteImage(query);
                             if (result)
                             {
                                 continue;
                             }
                             else
                             {
                                 json = "{success:false}";
                                 break;
                             }
                         }
                     }
                     json = "{success:true}";
                 }
                 else
                 {
                     json = "{success:false}";
                 }
             }
             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:false}";
             }


            this.Response.Clear();
            this.Response.Write(json.ToString());
            this.Response.End();
            return this.Response;
        }