微信红包接口开发

开源项目见：https://github.com/JeffreySu/WeiXinMPSDK

        public ActionResult SendRedPack()
        {
            string mchbillno = DateTime.Now.ToString("HHmmss") + TenPayV3Util.BuildRandomStr(28);

            string nonceStr = TenPayV3Util.GetNoncestr();

            RequestHandler packageReqHandler = new RequestHandler(null);

            packageReqHandler.SetParameter("nonce_str", nonceStr);              //随机字符串
            packageReqHandler.SetParameter("wxappid", AppId);          //公众账号ID
            packageReqHandler.SetParameter("mch_id", MchId);          //商户号
            packageReqHandler.SetParameter("mch_billno", mchbillno);                 //填入商家订单号
            packageReqHandler.SetParameter("nick_name", "提供方名称");                 //提供方名称
            packageReqHandler.SetParameter("send_name", "红包发送者名称");                 //红包发送者名称
            packageReqHandler.SetParameter("re_openid", "接受收红包的用户的openId");                 //接受收红包的用户的openId
            packageReqHandler.SetParameter("total_amount", "100");                //付款金额，单位分
            packageReqHandler.SetParameter("min_value", "100");                //最小红包金额，单位分
            packageReqHandler.SetParameter("max_value", "100");                //最大红包金额，单位分
            packageReqHandler.SetParameter("total_num", "1");               //红包发放总人数
            packageReqHandler.SetParameter("wishing", "红包祝福语");               //红包祝福语
            packageReqHandler.SetParameter("client_ip", Request.UserHostAddress);               //调用接口的机器Ip地址
            packageReqHandler.SetParameter("act_name", "活动名称");   //活动名称
            packageReqHandler.SetParameter("remark", "备注信息");   //备注信息
            string sign = packageReqHandler.CreateMd5Sign("key", Key);
            packageReqHandler.SetParameter("sign", sign);                        //签名

            //发红包需要post的数据
            string data = packageReqHandler.ParseXML();

            //发红包接口地址
            string url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack";

            //本地或者服务器的证书位置（证书在微信支付申请成功发来的通知邮件中）
            string cert = @"F:apiclient_cert.p12";

            //私钥（在安装证书时设置）
            string password = MchId;

            ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
            //调用证书
            X509Certificate2 cer = new X509Certificate2(cert, password, X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.MachineKeySet);

            HttpWebRequest webrequest = (HttpWebRequest)HttpWebRequest.Create(url);
            webrequest.ClientCertificates.Add(cer);
            webrequest.Method = "post";

            byte[] postdatabyte = Encoding.UTF8.GetBytes(data);
            webrequest.ContentLength = postdatabyte.Length;
            Stream stream;
            stream = webrequest.GetRequestStream();
            stream.Write(postdatabyte, 0, postdatabyte.Length);
            stream.Close();

            HttpWebResponse httpWebResponse = (HttpWebResponse)webrequest.GetResponse();
            StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
            string responseContent = streamReader.ReadToEnd();

            return Content(responseContent);
        }

         private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
         {
              if (errors == SslPolicyErrors.None)
                     return true;
              return false;
         }