public ActionResult DownloadBillPage(string bill_type, DateTime?bill_date)
        {
            var dateStr  = (bill_date.HasValue ? bill_date.Value : DateTime.Now).ToString("yyyyMMdd");
            var alertMsg = new AlertMsg();

            //调用下载对账单接口,如果内部出现异常则在页面上显示异常原因
            try
            {
                string result = WxPayApiBiz.DownloadBill(dateStr, bill_type);
                alertMsg.IsSuccess = true;
                alertMsg.Message   = result;
            }
            catch (WxPayException ex)
            {
                alertMsg.Message = ex.Message;
            }
            catch (Exception ex)
            {
                alertMsg.Message = ex.Message;
            }
            return(Json(alertMsg));
        }
        protected void submit_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(bill_date.Text))
            {
                Response.Write("<script LANGUAGE='javascript'>alert('请输入对账单日期!');</script>");
                return;
            }

            //调用下载对账单接口,如果内部出现异常则在页面上显示异常原因
            try
            {
                string result = WxPayApiBiz.DownloadBill(bill_date.Text, bill_type.SelectedValue);
                Response.Write("<span style='color:#00CD00;font-size:20px'>" + result + "</span>");
            }
            catch (WxPayException ex)
            {
                Response.Write("<span style='color:#FF0000;font-size:20px'>" + ex.ToString() + "</span>");
            }
            catch (Exception ex)
            {
                Response.Write("<span style='color:#FF0000;font-size:20px'>" + ex.ToString() + "</span>");
            }
        }