//條碼轉換為商品編號
        public string Getprodbyupc(string jsonStr)
        {
            try
            {
                if (!string.IsNullOrEmpty(Request.Params["item_id"]))
                {
                    string prodid = Request.Params["item_id"];
                    if (prodid.Length == 6)
                    {
                        jsonStr = prodid;
                    }
                    else
                    {
                        _IiplasMgr = new IplasMgr(mySqlConnectionString);
                        DataTable dt = _IiplasMgr.Getprodbyupc(prodid);
                        if (dt.Rows.Count > 0)
                        {
                            jsonStr = dt.Rows[0]["item_id"].ToString();
                        }
                        else
                        {
                            jsonStr = string.Empty;
                        }

                    }
                }
            }
            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);
                jsonStr = "{success:false}";
            }
            return jsonStr;
        }