用户扫码微信二维码生成订单(三)

时间:2024-03-09 18:26:10

官方API:https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=9_1

首先要修改/lib/HttpService.cs

把Get和Post中的的设置代理服务器代码进行隐藏:

修改前:

WebProxy proxy = new WebProxy();
proxy.Address = new Uri(WxPayConfig.PROXY_URL);
request.Proxy = proxy;

修改后:

//WebProxy proxy = new WebProxy();
//proxy.Address = new Uri(WxPayConfig.PROXY_URL);
//request.Proxy = proxy;

 

正文:

(注:用户必须把项目放到外网连接上才可以进行回调,生成订单。例如:http://www.xxxx.com/Wx/example/NativeNotifyPage.aspx---微信公众平台配置的回调)

用户扫码微信二维码后,微信服务器端会回调到用户在微信公众平台配置的回调url:/example/NativeNotifyPage.aspx 

NativeNotify nativeNatify = new NativeNotify(this);
nativeNatify.ProcessNotify();

 

ProcessNotify:(检查回调数据是否正常,正常就进行统一下单,统一成功下单后,用户可以加入自己的逻辑,最后返回结果给微信服务器确定下单)

 public override void ProcessNotify()
        {
            WxPayData notifyData = GetNotifyData();

            //检查openid和product_id是否返回
            if (!notifyData.IsSet("openid") || !notifyData.IsSet("product_id"))
            {
                WxPayData res = new WxPayData();
                res.SetValue("return_code", "FAIL");
                res.SetValue("return_msg", "回调数据异常");
                Log.Info(this.GetType().ToString(), "The data WeChat post is error : " + res.ToXml());
                page.Response.Write(res.ToXml());
                page.Response.End();
            }

            //调统一下单接口,获得下单结果
            string openid = notifyData.GetValue("openid").ToString();
            string product_id = notifyData.GetValue("product_id").ToString();
            WxPayData unifiedOrderResult = new WxPayData();
            try
            {
                unifiedOrderResult = UnifiedOrder(openid, product_id);
            }
            catch(Exception ex)//若在调统一下单接口时抛异常,立即返回结果给微信支付后台
            {
                WxPayData res = new WxPayData();
                res.SetValue("return_code", "FAIL");
                res.SetValue("return_msg", "统一下单失败");
                Log.Error(this.GetType().ToString(), "UnifiedOrder failure : " + res.ToXml());
                page.Response.Write(res.ToXml());
                page.Response.End();
            }

            //若下单失败,则立即返回结果给微信支付后台
            if (!unifiedOrderResult.IsSet("appid") || !unifiedOrderResult.IsSet("mch_id") || !unifiedOrderResult.IsSet("prepay_id"))
            {
                WxPayData res = new WxPayData();
                res.SetValue("return_code", "FAIL");
                res.SetValue("return_msg", "统一下单失败");
                Log.Error(this.GetType().ToString(), "UnifiedOrder failure : " + res.ToXml());
                page.Response.Write(res.ToXml());
                page.Response.End();
            }
       //用户可以加入自己的逻辑
            //统一下单成功,则返回成功结果给微信支付后台
            WxPayData data = new WxPayData();
            data.SetValue("return_code", "SUCCESS");
            data.SetValue("return_msg", "OK");
            data.SetValue("appid", WxPayConfig.APPID);
            data.SetValue("mch_id", WxPayConfig.MCHID);
            data.SetValue("nonce_str", WxPayApi.GenerateNonceStr());
            data.SetValue("prepay_id", unifiedOrderResult.GetValue("prepay_id"));
            data.SetValue("result_code", "SUCCESS");
            data.SetValue("err_code_des", "OK");
            data.SetValue("sign", data.MakeSign());

            Log.Info(this.GetType().ToString(), "UnifiedOrder success , send data to WeChat : " + data.ToXml());
            page.Response.Write(data.ToXml());
            page.Response.End();
        }

统一下单(用户可以根据自己的需要来修改参数,生成自己的订单):

 private WxPayData UnifiedOrder(string openId,string productId)
        {
            //统一下单
            WxPayData req = new WxPayData();
            req.SetValue("body", "test");//这个是内容,显示在订单上的,这个内容用户可以自行修改
            req.SetValue("attach", "test");
            req.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());
            req.SetValue("total_fee", 1);//这个是金额,1代表1分钱,钱数用户也可以修改
            req.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
            req.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));
            req.SetValue("goods_tag", "test");
            req.SetValue("trade_type", "NATIVE");
            req.SetValue("openid", openId);
            req.SetValue("product_id", productId);//这个是商品的ID
            WxPayData result = WxPayApi.UnifiedOrder(req);
            return result;
        }

统一下单成功后(生成类似这样的订单):