if (res.err_msg == "get_brand_wcpay_request:ok") {
   // message: "微信支付成功!",
   window.location.replace("@Url.Content("~/WxPay/Success?ordercode=@(Model.order_no)"));
}else if (res.err_msg == "get_brand_wcpay_request:cancel") { 
  // message: "已取消微信支付!"
 }

//支付回调页面
    public ActionResult notice_url()
    {
      string resultFromWx = getPostStr();
      //设置支付参数
      RequestHandler paySignReqHandler = new RequestHandler(null);
      WriteLog(" 微支付notice resultFromWx=" + resultFromWx);
      var res = XDocument.Parse(resultFromWx);
      //通信成功
      if (res.Element("xml").Element("return_code").Value == "SUCCESS")
      {
        if (res.Element("xml").Element("result_code").Value == "SUCCESS")
        {
          //交易成功
          paySignReqHandler.SetParameter("return_code", "SUCCESS");
          paySignReqHandler.SetParameter("return_msg", "OK");
          string ordecode = res.Element("xml").Element("out_trade_no").Value;
          BLL.orders Bll = new BLL.orders();
          try
          {
            if (Bll.Update(ordecode ))
            {
             WriteLog(" 微支付交易成功=" + ordecode);
            }
            else
            {
             WriteLog(" 微支付交易失败=" + ordecode);
            }
          }
          catch (Exception ex)
          {
            WriteLog(ex," 微支付交易异常=" + ordecode);
          }
        }
        else
        {
          paySignReqHandler.SetParameter("return_code", "FAIL");
          paySignReqHandler.SetParameter("return_msg", "交易失败");
        }
      }
      else
      {
        paySignReqHandler.SetParameter("return_code", "FAIL");
        paySignReqHandler.SetParameter("return_msg", "签名失败");
      }
      string data = paySignReqHandler.ParseXML();
      var result = TenPayV3.Unifiedorder(data);
      WriteLog(" 微支付notice result=" + result);
      return View();
    }

//获得Post过来的数据
    public string getPostStr()
    {
      Int32 intLen = Convert.ToInt32(Request.InputStream.Length);
      byte[] b = new byte[intLen];
      Request.InputStream.Read(b, 0, intLen);
      return System.Text.Encoding.UTF8.GetString(b);
    }