微信移动支付V3开发详细教程服务端采用.net mvc webapi（C#）

转自：http://www.kwstu.com/ArticleView/netmvc_201511132050268716

最近开发手机app需要实现移动支付功能，由于考虑支付安全将微信支付生成签名写到了服务器端，官网给的demo是在客户端的，纠结了几天终于实现了。

注本教程不对微信支付申请，移动开发配置做解释。

开发思路：下载微信移动支付demo，根据demo的代码重新写服务器端，然后将生成的签名信息替换demo里面参数测试服务器端的代码是否成功，然后在写服务器端的返回成功处理程序。

废话不多说了直接上代码吧

1、C#生成支付签名代码

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/// <summary>         /// 生成微信支付签名，生成结果直接在可以端提交即可         /// </summary>         /// <returns></returns>         public static string partnerid = ""; //PartnerID         public static string partnerkey = ""; //PartnerKey         public static string mchid = ""; //mchid         public static string appId = ""; //appid         public static string appsecret = ""; //appsecret         public static string appkey = ""; //paysignkey(非appkey 在微信商户平台设置 (md5)111111111111)         public static string timeStamp = ""; //时间戳         public static string nonceStr = ""; //随机字符串         public static string notify_url = "http://api.kwstu.com/Pay/WxNotifyUrl"; //支付完成后的回调处理页面,*替换成notify_url.asp所在路径         public static string prepayId = ""; //预支付ID         public static string sign = "";     //为了获取预支付ID的签名         public static string paySign = "";  //进行支付需要的签名         public static string package = "";  //进行支付需要的包         public HttpResponseMessage PostWxConfirmPay()         {                     //生成订单业务逻辑代码                                 //创建支付应答对象                     var packageReqHandler = new RequestHandler();                     //初始化                     packageReqHandler.init();                     timeStamp = TenpayUtil.getTimestamp();                     nonceStr = TenpayUtil.getNoncestr();                     //设置package订单参数                     packageReqHandler.setParameter("appid", appId);                     packageReqHandler.setParameter("body", unitBase.NAME + "于" + DateTime.Now.ToString("yyyy-MM-dd") + "在线预订“" + zphBase.ZPHNAME + "”的" + zphZwService.ZWID + "号展位,缴费" + price + "元。"); //商品信息 127字符                     packageReqHandler.setParameter("mch_id", mchid);                     packageReqHandler.setParameter("nonce_str", nonceStr.ToLower());                     packageReqHandler.setParameter("notify_url", notify_url);                     packageReqHandler.setParameter("out_trade_no", checkId); //商家订单号                     packageReqHandler.setParameter("spbill_create_ip", HttpContext.Current.Request.UserHostAddress); //用户的公网ip，不是商户服务器IPHttpContext.Current.Request.UserHostAddress                     packageReqHandler.setParameter("total_fee", (int.Parse(price)*100).ToString()); //商品金额,以分为单位(money * 100).ToString()                     packageReqHandler.setParameter("trade_type", "APP");                     //获取package包                     sign = packageReqHandler.CreateMd5Sign("key", appkey);                     packageReqHandler.setParameter("sign", sign);                     string data = packageReqHandler.parseXML();                     string prepayXml = HttpUtil.Send(data, "https://api.mch.weixin.qq.com/pay/unifiedorder");                     //获取预支付ID                     var xdoc = new XmlDocument();                     xdoc.LoadXml(prepayXml);                     XmlNode xn = xdoc.SelectSingleNode("xml");                     XmlNodeList xnl = xn.ChildNodes;                     if (xnl.Count > 7)                     {                         prepayId = xnl[7].InnerText;                         package = string.Format("prepay_id={0}", prepayId);                     }                     //设置支付参数                     var paySignReqHandler = new RequestHandler();                     paySignReqHandler.setParameter("appid", appId);                     paySignReqHandler.setParameter("noncestr", nonceStr.ToLower());                     paySignReqHandler.setParameter("package", "Sign=WXPay");                     paySignReqHandler.setParameter("partnerid", partnerid);                     paySignReqHandler.setParameter("prepayid", prepayId);                     paySignReqHandler.setParameter("timestamp", timeStamp);                     paySign = paySignReqHandler.CreateMd5Sign("key", appkey);                     var reList = new List<WxPayListModel>();                     var reModel = new WxPayListModel();                     reModel.appid = appId;                     reModel.noncestr = nonceStr.ToLower();                     reModel.package = "Sign=WXPay";                     reModel.partnerid = partnerid;                     reModel.prepayid = prepayId;                     reModel.timestamp = timeStamp;                     reModel.sign = paySign;                     reList.Add(reModel);           }

最终返回Json样例：

{"success":true,"msg":"操作成功","infor":[{"appid":"****","noncestr":"a532400ed62e772b9dc0b86f46e583ff","package":"Sign=WXPay","partnerid":"****","prepayid":"wx201511131946145c0b1467a10409581615","timestamp":"1447415119","sign":"3C2DC5263023BA69A268E353171DB0A0"}]}

替换客户端demo支付参数进行测试

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private void sendPayReq() {     msgApi.registerApp(Constants.APP_ID);     req.appId = Constants.APP_ID;     req.partnerId = Constants.MCH_ID;     req.prepayId = "wx201511131946145c0b1467a10409581615";     req.packageValue = "Sign=WXPay";     req.nonceStr = "a532400ed62e772b9dc0b86f46e583ff";     req.timeStamp ="1447415119";     req.sign = "3C2DC5263023BA69A268E353171DB0A0";     msgApi.sendReq(req); }

服务端支付成功处理代码

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ResponseHandler resHandler = new ResponseHandler(null);                 //if (!resHandler.IsTenpaySign())//验证签名                 //{                 //    LogUtil.WriteLog("sign error");                 //    return;                 //}                 //resHandler.SetKey(PayConfig.AppKey);                 ClassesLib.InsertLog("微信支付成功1");                 #region 解析参数                 //SUCCESS/FAIL此字段是通信标识，非交易标识，交易是否成功需要查                 string return_code = resHandler.GetParameter("return_code");                 ClassesLib.InsertLog("微信支付成功2" + return_code);                 //返回信息，如非空，为错误原因签名失败参数格式校验错误                 string return_msg = resHandler.GetParameter("return_msg");                 ClassesLib.InsertLog("微信支付成功3" + return_msg);                 if (return_code.ToUpper() != "SUCCESS")                 {                     //LogUtil.WriteLog("return_code faild:" + return_msg);                     return Content("验证失败");                 }                 #region 以下字段在 return_code 为 SUCCESS 的时候有返回                 //业务结果 SUCCESS/FAIL                 string result_code = resHandler.GetParameter("result_code");                 ClassesLib.InsertLog("微信支付成功4" + result_code);                 //微信分配的公众账号 ID                 string appid = resHandler.GetParameter("appid");                 ClassesLib.InsertLog("微信支付成功5" + appid);                 //微信支付分配的商户号                 string mch_id = resHandler.GetParameter("mch_id");                 ClassesLib.InsertLog("微信支付成功6" + mch_id);                 //微信支付分配的终端设备号                 string device_info = resHandler.GetParameter("device_info");                 ClassesLib.InsertLog("微信支付成功7" + device_info);                 //随机字符串                 string nonce_str = resHandler.GetParameter("nonce_str");                 ClassesLib.InsertLog("微信支付成功8" + nonce_str);                 string sign = resHandler.GetParameter("sign");                 ClassesLib.InsertLog("微信支付成功9" + sign);                 //错误代码                 string err_code = resHandler.GetParameter("err_code");                 ClassesLib.InsertLog("微信支付成功4" + err_code);                 //结果信息描述                 string err_code_des = resHandler.GetParameter("err_code_des");                 ClassesLib.InsertLog("微信支付成功10" + err_code_des);                 #endregion                 if (result_code.ToUpper() != "SUCCESS")                 {                     //LogUtil.WriteLog("result_code faild:错误代码" + err_code + "结果信息描述" + err_code_des);                     return Content("验证失败");                 }                 #region 以下字段在 return_code 和 result_code 都为 SUCCESS 的时候有返回                 //用户在商户 appid 下的唯一标识                 string openid = resHandler.GetParameter("openid");                 ClassesLib.InsertLog("微信支付成功11" + openid);                 //用户是否关注公众账号，Y-关注，N-未关注，仅在公众账号类型支付有效                 string is_subscribe = resHandler.GetParameter("is_subscribe");                 ClassesLib.InsertLog("微信支付成功12" + is_subscribe);                 //JSAPI、NATIVE、MICROPAY、APP                 string trade_type = resHandler.GetParameter("trade_type");                 ClassesLib.InsertLog("微信支付成功13" + trade_type);                 //银行类型，采用字符串类型的银行标识                 string bank_type = resHandler.GetParameter("bank_type");                 ClassesLib.InsertLog("微信支付成功14" + bank_type);                 //订单总金额，单位为分                 string total_fee = resHandler.GetParameter("total_fee");                 ClassesLib.InsertLog("微信支付成功15" + total_fee);                 //现金券金额                 string coupon_fee = resHandler.GetParameter("coupon_fee");                 ClassesLib.InsertLog("微信支付成功16" + coupon_fee);                 //货币类型，符合 ISO 4217 标准的三位字母代码，默认人民币：CNY                 string fee_type = resHandler.GetParameter("fee_type");                 ClassesLib.InsertLog("微信支付成功17" + fee_type);                 //微信支付订单号                 string transaction_id = resHandler.GetParameter("transaction_id");                 ClassesLib.InsertLog("微信支付成功18" + transaction_id);                 //商户系统的订单号，与请求一致。                 string out_trade_no = resHandler.GetParameter("out_trade_no");                 ClassesLib.InsertLog("微信支付成功19" + out_trade_no);                 //商家数据包，原样返回                 string attach = resHandler.GetParameter("attach");                 ClassesLib.InsertLog("微信支付成功20" + attach);                 //支 付 完 成 时 间 ， 格 式 为yyyyMMddhhmmss，如 2009 年12 月27日 9点 10分 10 秒表示为 20091227091010。时区为 GMT+8 beijing。该时间取自微信支付服务器                 string time_end = resHandler.GetParameter("time_end");                 ClassesLib.InsertLog("微信支付成功21" + time_end);                 #endregion                 #endregion                 //LogUtil.WriteLog("4.total_fee= " + total_fee + "、err_code_des=" + err_code_des + "、result_code=" + result_code);                 if (!out_trade_no.Equals(""))                 {                     //LogUtil.WriteLog("5.success");                     ClassesLib.InsertLog("微信支付成功业务逻辑");                     Response.Write("success");                     /**                      *  这里输入用户逻辑操作，比如更新订单的支付状态                      *                      * **/                     return Content("支付成功！");                 }                 return Content("验证失败");             }             catch (Exception ex)             {                 //LogUtil.WriteLog("Notify 页面  发送异常错误：" + ex.Message);                 return Content("支付失败");             }

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