微信消息配置

已.NET 为例子，WeiXinMPSDK支持公众号与企业号，实现起来也比较简单

    /// <summary>
    /// 微信控制器
    /// </summary>
    public class WeixinController : Controller
    {
        private static readonly Logger logger = LogManager.GetCurrentClassLogger();
        public readonly string token = DbSetting.getAppText("Token");
        public readonly string appId = DbSetting.getAppText("AppID");
        public readonly string encodingAESKey = DbSetting.getAppText("EncodingAESKey");

        /// <summary>
        /// 微信验签
        /// </summary>
        /// <param name="signature"></param>
        /// <param name="timestamp"></param>
        /// <param name="nonce"></param>
        /// <param name="echostr"></param>
        /// <returns></returns>
        [HttpGet]
        public async Task<ActionResult> Index(string signature, string timestamp, string nonce, string echostr)
        {
            return await Task.Run(() =>
            {
                if (!CheckSignature.Check(signature, timestamp, nonce, token))
                {
                    return "failed:" + signature + "," + CheckSignature.GetSignature(timestamp, nonce, token) + "。如果你在浏览器中看到这句话，说明此地址可以被作为微信公众账号后台的Url，请注意保持Token一致。";
                }
                return echostr;
            }).ContinueWith(task => Content(task.Result));
        }


        /// <summary>
        /// 处理微信消息
         /// </summary>
        /// <param name="postModel">参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<ActionResult> Index(PostModel postModel)
        {
            return await Task.Run<ActionResult>(() =>

            {
                if (!CheckSignature.Check(postModel.Signature, postModel.Timestamp, postModel.Nonce, token))
                {
                    return new WeixinResult("参数错误！");
                }
                postModel.Token = token;
                postModel.EncodingAESKey = encodingAESKey;
                postModel.AppId = appId;
                var messageHandler = new MpWeixinMessageHandler(Request.InputStream, postModel);
                messageHandler.Execute();
                return new FixWeixinBugWeixinResult(messageHandler);
            }).ContinueWith(task => task.Result);
        }
   }

消息重载

    /// <summary>
    /// 处理微信消息 
    /// </summary>
    public class MpWeixinMessageHandler : MessageHandler<MessageContext<IRequestMessageBase, IResponseMessageBase>>
    {
        private static readonly Logger logger = LogManager.GetCurrentClassLogger();
        public readonly string appId = DbSetting.getAppText("AppID");
        public readonly string appSecret = DbSetting.getAppText("AppSecret");

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="inputStream"></param>
        /// <param name="postModel"></param>
        public MpWeixinMessageHandler(Stream inputStream, PostModel postModel)
            : base(inputStream, postModel)
        {
            WeixinContext.ExpireMinutes = 5;
        }

        /// <summary>
        /// 默认消息 [没有重写的OnXX方法，将默认返回DefaultResponseMessage中的结果]
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>

        public override IResponseMessageBase DefaultResponseMessage(IRequestMessageBase requestMessage)
        {
            //ResponseMessageText也可以是News等其他类型
            var responseMessage = this.CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = "这条消息来自DefaultResponseMessage。";
            return responseMessage;
        }

        /// <summary>
        /// 关注微信公众号
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnEvent_SubscribeRequest(RequestMessageEvent_Subscribe requestMessage)
        {
            var responseMessage = ResponseMessageBase.CreateFromRequestMessage<ResponseMessageText>(requestMessage);
            var token = CommonApi.GetToken(appId, appSecret).access_token;
            var user = CommonApi.GetUserInfo(token, requestMessage.FromUserName);
            responseMessage.Content = "Hi " + user.nickname + " ,感谢您关注XXX！！！";
            return responseMessage;
        }

        /// <summary>
        /// 取消关注公众号
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnEvent_UnsubscribeRequest(RequestMessageEvent_Unsubscribe requestMessage)
        {
            return base.OnEvent_UnsubscribeRequest(requestMessage);
        }

        /// <summary>
        /// 发送文本消息
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnTextRequest(RequestMessageText requestMessage)
        {
            var responseMessage = ResponseMessageBase.CreateFromRequestMessage<ResponseMessageText>(requestMessage);
            responseMessage.Content = "感谢您关注XXX！！！ ";
            return responseMessage;
        }
    }

微信支付签名

#region 创建订单与生成微信支付 JSAPPI 签名
        /// <summary>
        /// 创建订单与生成微信支付 JSAPPI 签名
        /// </summary>
        /// <param name="create">订餐参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<ActionResult> Create(Create create)
        {
            try
            {
                logger.Info("orders create xml: " + create.ToXml());
                if (!ModelState.IsValid)
                    return Json(new { IsError = true, ErrorMsg = "创建订单参数异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                //取购物车缓存
                  var cart = CacheManger.Cache.Get<CartInfoModel>(create.OpenId);
                if (cart.IsNull() || cart.ShopId.IsNullOrEmpty() || cart.OpenID.IsNullOrEmpty() || cart.OpenID != create.OpenId || cart.CartItemList.IsNull() || cart.CartItemList.Count == 0)
                    return Json(new { IsError = true, ErrorMsg = "创建订单参数异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                //控制库存与订单事物
                using (var conn = new SqlConnection(DbSetting.App))
                {
                    await conn.OpenAsync();
                    var trans = conn.BeginTransaction();

                    //验证价格及库存[重要]

                    //创建订单
                    string subject = @"xxx支付";
                    string orderNo = WxPayConfig.OutTradeNo;
                    //!!! 1分钱测试 !!!
                    decimal total_fee = 0.01m;
                    var executeNum = await conn.ExecuteAsync(@"INSERT INTO Orders
                                                                (
                                                                    Origin,
                                                                    ShopId,
                                                                    OpenId,
                                                                    Name,
                                                                    PhoneNo,
                                                                    [Subject],
                                                                    OrderNo,
                                                                    [Status],
                                                                    TotalFee,
                                                                    Coupon,
                                                                    Memo,
                                                                    CreateTime
                                                                )
                                                                VALUES
                                                                (
                                                                    @Origin,
                                                                    @ShopId,
                                                                    @OpenId,
                                                                    @Name,
                                                                    @PhoneNo,
                                                                    @Subject,
                                                                    @OrderNo,
                                                                    @Status,
                                                                    @TotalFee,
                                                                    @Coupon,
                                                                    @Memo,
                                                                    @CreateTime
                                                                )", new
                    {
                        Origin = AbpConstants.WEIXIN_ORIGIN,
                        OpenId = create.OpenId,
                        ShopId = Guid.Parse(cart.ShopId),
                        Name = create.UserName,
                        PhoneNo = create.Phone,
                        Subject = subject,
                        OrderNo = orderNo,
                        Status = "R",
                        TotalFee = cart.TotalPrice,
                        Coupon = "0",
                        Memo = string.Empty,
                        CreateTime = DateTime.Now
                    }, trans);
                    if (executeNum <= 0)
                    {
                        trans.Rollback();
                        return Json(new { IsError = true, ErrorMsg = "创建订单异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                    }
                    foreach (var item in cart.CartItemList.Where(t => t.CartNum != 0))
                    {
                        executeNum = conn.Execute(@"INSERT INTO OrderDetail
                                                                    (
                                                                        OrderId,
                                                                        ItemId,
                                                                        ItemName,
                                                                        Num,
                                                                        UnitPrice,
                                                                        TotalFee
                                                                    )
                                                                    VALUES
                                                                    (
                                                                        @OrderId,
                                                                        @ItemId,
                                                                        @ItemName,
                                                                        @Num,
                                                                        @UnitPrice,
                                                                        @TotalFee
                                                                    )", new
                        {
                            OrderId = orderNo,
                            ItemId = item.ItemId,
                            ItemName = item.ItemName,
                            Num = item.CartNum,
                            UnitPrice = item.Price,
                            TotalFee = item.Price * item.CartNum
                        }, trans);
                        if (executeNum <= 0)
                        {
                            trans.Rollback();
                            return Json(new { IsError = true, ErrorMsg = "创建订单明细异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                        }
                    }
                    //提交事物
                      trans.Commit();
                    var wxpay = await Order(WxPayConfig.APPID, create.OpenId, WxPayConfig.MCHID, orderNo, total_fee, WxPayConfig.NonceStr, subject, "没有优惠券", "XXX");
                    if (wxpay.IsError)
                    {
                        return Redirect(DbSetting.getAppText("Domain") + @"/oauth/1");
                    }
                    var jsApiDict = new SortedDictionary<string, string>();
                    jsApiDict.Add("appId", appId);
                    jsApiDict.Add("timeStamp", WxPayConfig.TimeStamp);
                    jsApiDict.Add("nonceStr", WxPayConfig.NonceStr);
                    jsApiDict.Add("package", "prepay_id=" + (wxpay.Data as SortedDictionary<string, string>)["prepay_id"]);
                    jsApiDict.Add("signType", "MD5");
                    jsApiDict.Add("paySign", WxPayConfig.GenerateSign(jsApiDict));
                    return Json(new { IsError = false, ErrorMsg = string.Empty, Data = jsApiDict.ConvertDictionaryToJson() }, JsonRequestBehavior.AllowGet);
                }
            }
            catch (Exception ex)
            {
                logger.Info("orders create  xml: " + create.ToXml() + " exception message: " + ex.Message);
                return Json(new
                {
                    IsError = true,
                    ErrorMsg = "创建订单异常!!!",
                    Data = string.Empty
                }, JsonRequestBehavior.AllowGet);
            }
        }
        #endregion

        #region 微信支付签名
        /// <summary>
        /// 微信支付签名
        /// </summary>
        /// <param name="appid">公众账号ID</param>
        /// <param name="openid">微信唯一标识</param>
        /// <param name="mch_id">商户号</param>
        /// <param name="out_trade_no">商户订单号</param>
        /// <param name="total_fee">订单总金额，单位为分</param>
        /// <param name="nonce_str">随机字符串</param>
        /// <param name="body"></param>
        /// <param name="goods_tag"></param>
        /// <param name="attach"></param>
        /// <returns></returns>
        private async Task<WebAPIResponse> Order(string appid, string openid, string mch_id, string out_trade_no, decimal total_fee, string nonce_str, string body, string goods_tag, string attach)
        {
            try
            {
                //网页端调起支付API
                //https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6
                //统一下单
                  //https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1
                var dict = new SortedDictionary<string, string>();
                dict.Add("appid", appid);
                dict.Add("openid", openid);
                dict.Add("mch_id", mch_id);
                dict.Add("nonce_str", nonce_str);
                dict.Add("out_trade_no", out_trade_no);
                //订单总金额，单位为分
                  dict.Add("total_fee", Convert.ToInt32(total_fee * 100).ToString());
                //附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据
                  dict.Add("attach", attach);
                dict.Add("body", body);
                dict.Add("trade_type", WxPayConfig.TRADETYPE);
                //终端IP
                dict.Add("spbill_create_ip", AbpConstants.Ip());
                dict.Add("notify_url", DbSetting.getAppText("NOTIFY_URL"));
                //商品标记，代金券或立减优惠功能的参数
                  dict.Add("goods_tag", goods_tag);
                dict.Add("time_expire", DateTime.Now.AddMinutes(30).ToString("yyyyMMddHHmmss"));
                dict.Add("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
                dict.Add("sign", WxPayConfig.GenerateSign(dict));
                string xml = "<xml>";
                foreach (var pair in dict)
                {
                    if (pair.Value.GetType() == typeof(int))
                    {
                        xml += "<" + pair.Key + ">" + pair.Value + "</" + pair.Key + ">";
                    }
                    else if (pair.Value.GetType() == typeof(string))
                    {
                        xml += "<" + pair.Key + ">" + "<![CDATA[" + pair.Value + "]]></" + pair.Key + ">";
                    }
                }
                xml += "</xml>";
                logger.Info("OrdersController unifiedorder Req xml: " + xml);
                var data = await @"https://api.mch.weixin.qq.com/pay/unifiedorder".PostStringAsync(xml).ReceiveString();
                logger.Info("OrdersController unifiedorder Resp xml: " + data);
                if (data.IsNotNullOrEmpty() && data.Contains("SUCCESS", StringComparison.OrdinalIgnoreCase))
                {
                    return new WebAPIResponse { IsError = false, Msg = "签名成功", Data = data.ConvertWeixinXmlToSortedDictionary() };
                }
                return new WebAPIResponse { IsError = true, Msg = "微信支付签名失败" };
            }
            catch (Exception ex)
            {
                logger.Error("OrdersController unifiedorder Exception :" + ex.Message);
                return new WebAPIResponse { IsError = true, Msg = "微信支付签名失败" };
            }
        }
        #endregion

        #region 微信订单查询
        /// <summary>
        /// 微信订单查询
        /// </summary>
        /// <param name="appid">公众账号ID</param>
        /// <param name="mch_id">商户号</param>
        /// <param name="transaction_id">微信的订单号</param>
        /// <param name="out_trade_no">商户订单号</param>
        /// <param name="nonce_str">随机字符串</param>
        /// <param name="sign">签名</param>
        /// <returns></returns>
        private async Task<WebAPIResponse> Query(string appid, string mch_id, string transaction_id, string out_trade_no, string nonce_str, string sign)
        {
            if (appid.IsEmpty() || mch_id.IsEmpty() || transaction_id.IsEmpty())
            {
                return new WebAPIResponse { IsError = true, Msg = "参数有误！！！" };
            }
            try
            {
                var dict = new Dictionary<string, string>();
                dict.Add("appid", appid);
                dict.Add("mch_id", mch_id);
                dict.Add("transaction_id", transaction_id);
                dict.Add("out_trade_no", out_trade_no);
                dict.Add("nonce_str", nonce_str);
                dict.Add("sign", sign);
                string xml = "<xml>";
                foreach (var pair in dict)
                {
                    if (pair.Value.GetType() == typeof(int))
                    {
                        xml += "<" + pair.Key + ">" + pair.Value + "</" + pair.Key + ">";
                    }
                    else if (pair.Value.GetType() == typeof(string))
                    {
                        xml += "<" + pair.Key + ">" + "<![CDATA[" + pair.Value + "]]></" + pair.Key + ">";
                    }
                }
                xml += "</xml>";
                logger.Info("OrdersController WeixinNotify Req xml: " + xml);
                var data = await @"https://api.mch.weixin.qq.com/pay/orderquery".PostStringAsync(xml).ReceiveString();
                logger.Info("OrdersController WeixinNotify Resp xml: " + data);
                if (data.IsNotNullOrEmpty() && data.Contains("SUCCESS", StringComparison.OrdinalIgnoreCase))
                {
                    return new WebAPIResponse { IsError = false, Data = "查询订单成功！！！" };
                }
                return new WebAPIResponse { IsError = true, Msg = "微信订单查询失败！！！" };
            }
            catch (Exception ex)
            {
                logger.Error("OrdersController Exception :" + ex.Message);
                return new WebAPIResponse { IsError = true, Msg = ex.Message };
            }
        }
        #endregion

JS签名调起支付窗口

<script type="text/javascript">
    if (typeof WeixinJSBridge == "undefined") {
                    if (document.addEventListener) {
                        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
                    } else if (document.attachEvent) {
                        document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
                        document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
                    }
                } else {
                    onBridgeReady();
                }
        @*@Html.Raw(Model.WeixinJsAPI)*@
        function onBridgeReady() {
            WeixinJSBridge.invoke(
               'getBrandWCPayRequest', $.parseJSON(document.getElementById("WeixinJsAPI").value),
                function (data) {
                    if (data.err_msg == 'get_brand_wcpay_request:ok') {
                        window.location.href = ' @Url.Content("~/oauth/orders")';
                    } else {
                        $('.confirmbtn').removeAttr('disabled').css('background-color', '#80D200');
                    }
                }
            );
        }
    </script>

微信异步回调消息

         /// <summary>
        /// 微信支付异步通知
         /// </summary>
        /// <returns></returns>
        public async Task<ActionResult> Notify()
        {
            int intLen = Convert.ToInt32(Request.InputStream.Length);
            if (intLen <= 0)
            {
                return Json(new { IsError = true, ErrorMsg = "没有微信支付异步参数!!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
            }
            try
            {
                var dict = new SortedDictionary<string, string>();
                //dict = @"appid=wx0ae16b319cd984cf&attach=XXX&bank_type=CFT&cash_fee=1&fee_type=CNY&is_subscribe=Y&mch_id=1287151001&nonce_str=40f11a82cdde44588ec7d6b6bf9cca9d&openid=oxf8ns9AW1IwSwskzglgMH69t38o&out_trade_no=2015121621484780479309&result_code=SUCCESS&return_code=SUCCESS&sign=21C2A8727668E030BF801AB5B701BF93&time_end=20151216214906&total_fee=1&trade_type=JSAPI&transaction_id=1002230068201512162126471549".ConvertStringToSortedDictionary();
                var xmlDoc = new XmlDocument();
                xmlDoc.Load(Request.InputStream);
                var root = xmlDoc.SelectSingleNode("xml");
                XmlNodeList xnl = root.ChildNodes;
                foreach (XmlNode xnf in xnl)
                {
                    dict.Add(xnf.Name, xnf.InnerText);
                }
                if (dict.Count <= 0)
                {
                    return Json(new { IsError = true, ErrorMsg = "没有异步参数!!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                }
                logger.Info("【 WeixinController Notify SDKUtil.ConvertDictionaryToString : 请求报文=[" + dict.ConvertDictionaryToString() + "]
");
                //验证签名
                string signK = WxPayConfig.GenerateSign(dict);
                if (signK != dict["sign"])
                {
                    logger.Info("WeixinController Notify Verify WxSign Error : 请求报文=[signK " + signK + " : dict['sign'] " + dict["sign"] + "]
");
                    return Json(new { IsError = true, ErrorMsg = "验证签名失败 !!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                }
                //验证通信标识
                string return_code = dict["return_code"];
                if (!return_code.Equals("SUCCESS", StringComparison.OrdinalIgnoreCase))
                {
                    string return_msg = dict["return_msg"];
                    logger.Info("WeixinController Notify return_code Error : 请求报文=[" + return_code + " : " + return_msg + "]
");
                    return Json(new { IsError = true, ErrorMsg = "验证通信标识失败 !!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                }
                //验证交易标识[重要！！！]
                string result_code = dict["result_code"];
                if (!result_code.Equals("SUCCESS", StringComparison.OrdinalIgnoreCase))
                {
                    string err_code = dict["err_code"];
                    string err_code_des = dict["err_code_des"];
                    logger.Info("WeixinController Notify return_code Error : 请求报文=[" + err_code + " : " + err_code_des + "]
");
                    return Json(new { IsError = true, ErrorMsg = "验证交易标识失败 !!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                }
                //公众账号ID
                string appid = dict["appid"];
                //商户号
                string mch_id = dict["mch_id"];
                //随机字符串
                string nonce_str = dict["nonce_str"];
                //签名
                string sign = dict["sign"];
                //用户在商户appid 下的唯一标识
                string openid = dict["openid"];
                //用户是否关注公众账
                string is_subscribe = dict["is_subscribe"];
                //交易类型
                string trade_type = dict["trade_type"];
                //付款银行
                string bank_type = dict["bank_type"];
                //订单总金额[金额分转元]
                string total_fee = (float.Parse(dict["total_fee"]) / 100).ToString();
                //商户订单号
                string out_trade_no = dict["out_trade_no"];
                //微信支付订单号
                string transaction_id = dict["transaction_id"];
                //商家数据包
                string attach = dict["attach"];
                //支付完成时间
                string time_end = dict["time_end"];

                #region 微信订单查询【使用签名验证废弃】
                //var wxorder = await _weixinService.Query(WxPayConfig.KEY, WxPayConfig.APPID, WxPayConfig.MCHID, transaction_id, out_trade_no);
                #endregion

                //验证查询订单状态[R 预定状态  C 取消状态 P 支付完成  I 取单完成  D 送货状态]
                var order = await new SqlConnection(DbSetting.App).QueryAsync<Orders>(@"SELECT *FROM Orders WHERE OrderNo=@OrderNo", new { OrderNo = out_trade_no }).ContinueWith(t => t.Result.SingleOrDefault());
                if (order.IsNull() || order.Status.Trim() != "R" || order.TradeNO.IsNotNullOrEmpty() || order.PayFee.IsNotNullOrEmpty())
                {
                    logger.Error("WeixinController Notify order Error xml : " + order.ToXml() + string.Format("  订单: {0} 信息不正确，如有疑问请联系客服！", out_trade_no));
                    return Json(new { IsError = true, ErrorMsg = "验证查询订单状态失败 !!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                }
                using (var conn = new SqlConnection(DbSetting.App))
                {
                    await conn.OpenAsync();
                    var trans = conn.BeginTransaction();
                    //记录微信异步信息
                    var executeNum = await conn.ExecuteAsync(@"INSERT INTO PayNotify
                                                                (
                                                                    openid,
                                                                    is_subscribe,
                                                                    trade_type,
                                                                    bank_type,
                                                                    transaction_id,
                                                                    out_trade_no,
                                                                    total_fee,
                                                                    coupon_fee,
                                                                    attach,
                                                                    memo,
                                                                    time_end,
                                                                    createtime
                                                                )
                                                                VALUES
                                                                (
                                                                    @openid,
                                                                    @is_subscribe,
                                                                    @trade_type,
                                                                    @bank_type,
                                                                    @transaction_id,
                                                                    @out_trade_no,
                                                                    @total_fee,
                                                                    @coupon_fee,
                                                                    @attach,
                                                                    @memo,
                                                                    @time_end,
                                                                    @createtime
                                                                )", new
                    {
                        openid = openid,
                        is_subscribe = is_subscribe,
                        trade_type = trade_type,
                        bank_type = bank_type,
                        transaction_id = transaction_id,
                        out_trade_no = out_trade_no,
                        total_fee = total_fee,
                        coupon_fee = 0.0m,
                        attach = attach,
                        memo = dict.ConvertDictionaryToJson(),
                        time_end = time_end,
                        createtime = DateTime.Now
                    }, trans);
                    if (executeNum <= 0)
                    {
                        trans.Rollback();
                        return Json(new { IsError = true, ErrorMsg = "记录微信异步信息异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                    }
                    //更新订单支付信息
                    executeNum = await conn.ExecuteAsync(@"UPDATE Orders SET Status = 'P', TradeNO = @TradeNO, PayFee = @PayFee, PayTime = GETDATE()", new
                    {
                        TradeNO = transaction_id,
                        PayFee = total_fee,
                    }, trans);
                    if (executeNum <= 0)
                    {
                        trans.Rollback();
                        return Json(new { IsError = true, ErrorMsg = "更新订单支付信息异常!!!", Data = string.Empty }, JsonRequestBehavior.AllowGet);
                    }
                    //!!! 扣菜品库存

                    trans.Commit();
                }
                //构造成功XML
                var wxdict = new SortedDictionary<string, string>();
                wxdict.Add("return_code", "SUCCESS");
                wxdict.Add("return_msg", "PAY_SUCCESS");
                string wxRXml = wxdict.ConvertWxDictToString();
                logger.Info("WeixinController Notify Success wxRXml : " + wxRXml + " 】");
                return Content(wxRXml,@"text/xml",System.Text.Encoding.UTF8);
            }
            catch (Exception ex)
            {
                logger.Fatal("WeixinController Notify Exception : " + ex.Message + " 】");
                return Json(new { IsError = true, ErrorMsg = "微信支付异常失败 !!! ", Data = string.Empty }, JsonRequestBehavior.AllowGet);
            }
        }

！！！注意事项

支付授权目录与测试人的微信帐号白名单(出现access_denied或access_not_allow错误，请检查是否设置正确)

支付授权目录区分大小写

安全域名配置