public string pay(AlipayTradePagePayModel para)
        {
            try
            {
                AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();
                // 设置同步回调地址
                request.SetReturnUrl("");
                // 设置异步通知接收地址
                request.SetNotifyUrl("");
                // 将业务model载入到request

                para.QrPayMode = "2";
                request.SetBizModel(para);

                AlipayTradePagePayResponse response = client.PageExecute(request, null, "post");
                return(response.Body);
            }
            catch (Exception e)
            {
                Logger.Error("失败", e);
                return("支付失败");
            }
        }
 public T PageExecute <T>(IAopRequest <T> request) where T : AopResponse
 {
     return(_aopClient.PageExecute(request));
 }