基于C#实现微信支付宝扫码支付功能

/**
* 生成直接支付url，支付url有效期为2小时,模式二
* @param productId 商品ID
* @return 模式二URL
*/
public ActionResult GetPayUrl()
{
   //参数
   WxPayData data = new WxPayData();
   data.SetValue("body", “test”);//商品描述
   data.SetValue("attach", "");//附加数据
   data.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());//随机字符串
   data.SetValue("total_fee", 100);//总金额
   data.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));//交易起始时间
   data.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));//交易结束时间
   data.SetValue("goods_tag", "");//商品标记
   data.SetValue("trade_type", "NATIVE");//交易类型
   data.SetValue("product_id", "1234");//商品ID
   WxPayData result = WxPayApi.UnifiedOrder(data);//调用统一下单接口
   string url = result.GetValue("code_url").ToString();//获得统一下单接口返回的二维码链接
   var jsonData = new
   {
    url = HttpUtility.UrlEncode(url)
   };
   return Success(jsonData);
    }

//将url转换为二维码图片
public void CodeConversionTool(string str)
    {
      //初始化二维码生成工具
      QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
      qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
      qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
      qrCodeEncoder.QRCodeVersion = 0;
      qrCodeEncoder.QRCodeScale = 4;
      //将字符串生成二维码图片
      Bitmap image = qrCodeEncoder.Encode(str, Encoding.Default);
      //保存为PNG到内存流 
      MemoryStream ms = new MemoryStream();
      image.Save(ms, ImageFormat.Png);
      //输出二维码图片
      Response.BinaryWrite(ms.GetBuffer());
      Response.End();
    }

$.lrSetForm(top.$.rootUrl + 'Test/GetPayUrl',function (data) {
          $("#img").attr("src",top.$.rootUrl + '/Test/CodeConversionTool?str=' + data.url);
        });

public string WxPayNotify()
    {
      WePayReturnModel payResult = new WePayReturnModel();
      HttpContextBase context = (HttpContextBase)Request.Properties["MS_HttpContext"];//获取传统context  
      HttpRequestBase request = context.Request;//定义传统request对象
      bool result = VerifyNotify(request, out payResult);
      if (result)
      {
        //业务代码
        /////////////////////////
        /////////////////////////
        //如果成功，告知微信不用再调用回调方法
          WxPayData res = new WxPayData();
          res.SetValue("transaction_id", payResult.TradeNo);
          res.SetValue("return_code", "SUCCESS");
          res.SetValue("return_msg", "OK");
          return res.ToXml();
      }
      else
      {
        return "fail";
      }
    }