public string DownloadQRCode(string pRequest)
        {
            //try
            //{
            var rd  = new RetailTraderItemQRCodeRD();
            var rsp = new SuccessResponse <IAPIResponseData>(rd);

            string path = "";
            var    rp   = pRequest.DeserializeJSONTo <APIRequest <RetailTraderItemQRCode> >();

            if (string.IsNullOrEmpty(rp.Parameters.RetailTraderId))
            {
                throw new APIException("请输入RetailTraderId参数")
                      {
                          ErrorCode = 000
                      }
            }
            ;
            var         loggingSessionInfo = new SessionManager().CurrentUserLoginInfo;
            var         bll                = new RetailTraderBLL(loggingSessionInfo);
            HttpContext context            = System.Web.HttpContext.Current;
            var         entityRetailTrader = bll.GetByID(rp.Parameters.RetailTraderId);
            DataSet     ds = bll.RetailTraderItemQRCode(rp.Parameters.RetailTraderId);

            try
            {
                if (ds != null && ds.Tables[0].Rows.Count > 0)
                {
                    List <GetRetailTraderItemQRCode> list = DataTableToObject.ConvertToList <GetRetailTraderItemQRCode>(ds.Tables[0]).ToList();
                    path = CreateZipAndResponse(list, context.Response, entityRetailTrader.RetailTraderName);
                    if (!string.IsNullOrEmpty(path))
                    {
                        rd.FilePath = path;
                    }
                }
                else
                {
                    throw new Exception("未绑定商品!");
                    //context.Response.Write("<script languge='javascript'>alert('No Data'); window.location.href='index.aspx'</script>");
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }


            return(rsp.ToJSON());
        }