微信支付，支付宝支付.退款 转账

转。https://www.cnblogs.com/liuxiaoji/p/9234161.html

微信支付 

https://github.com/842549829/Fund/blob/master/Weixin/CreateRequest.cs

/// <summary>
    /// 创建请求信息
    /// </summary>
    public class CreateRequest
    {
        #region web微信公众号
        /// <summary>
        /// 创建支付信息(安卓 IOS)
        /// </summary>
        /// <param name="request">request</param>
        /// <param name="config">配置</param>
        /// <returns>结果</returns>
        public static UnifiedOrderResult CreateDirectPayByUser(UnifiedOrderRequest request, Config config)
        {
            // 统一下单
            var requestStr = TenpayUtil.GetUnifiedOrderXml(request, config);
            var response = HttpHelp.PostXmlToUrl(Config.UnifiedPayUrl, requestStr);
            var unifiedOrderResult = TenpayUtil.ConvertToUnifiedOrderResult(response);
            // 调起支付
            var parameters = TenpayUtil.GetPaySign(unifiedOrderResult, config);
            var result = TenpayUtil.CreatePayParameters(parameters, unifiedOrderResult);
            return result;
        }

        /// <summary>
        /// 创建支付信息(网页公众号)
        /// </summary>
        /// <param name="request">request</param>
        /// <param name="config">配置</param>
        /// <returns>结果</returns>
        public static WapUnifiedOrderResult CreateDirectWapPayByUser(WapUnifiedOrderRequest request, Config config)
        {
            // 统一下单
            var requestStr = TenpayUtil.GetUnifiedWapOrderXml(request, config);
            var response = HttpHelp.PostXmlToUrl(Config.UnifiedPayUrl, requestStr);
            var unifiedOrderResult = TenpayUtil.ConvertToWapUnifiedOrderResult(response);
            // 调起支付
            var parameters = TenpayUtil.GetWapPaySign(unifiedOrderResult, config);
            var result = TenpayUtil.CreatePayParameters(parameters, unifiedOrderResult);
            return result;
        }
......

支付通知：https://github.com/842549829/Fund/blob/master/Notify/Controllers/TenpayNoticeController.cs

/// <summary>
    /// 腾讯通知
    /// </summary>
    public class TenpayNoticeController : BaseController
    {
        /// <summary>
        /// 微信Sdk支付通知
        /// </summary>
        /// <returns>ContentResult</returns>
        public ContentResult PaySdkNotice()
        {
            try
            {
                var requestStr = GetRequestStr();
                var flg = Weixin.Notify.PayNotify(requestStr, new Weixin.Model.Config { /*微信配置信息*/ });
                if (flg.IsSuccess)
                {
                    // 处理业务
                    return new ContentResult { Content = GetResult(true, "OK") };
                }
                else
                {
                    return new ContentResult { Content = GetResult(false, flg.Message) };
                }
            }
            catch (Exception ex)
            {
                return new ContentResult { Content = GetResult(false, "微信支付通知异常") };
            }
        }

支付宝支付

老版本 ：https://github.com/842549829/Fund/blob/master/AliPay/CreateRequest.cs

/// <summary>
    /// CreateRequest
    /// 航旅版 :加密参数需要Pid Key 
    /// 蚂蚁金服 :全部
    /// </summary>    
    public class CreateRequest
    {
        /// <summary>
        /// 创建PC支付链接串(航旅版)
        /// </summary>
        /// <param name="directInfo">支付信息</param>
        /// <param name="config">config</param>
        /// <returns>请求连接</returns>
        public static string CreateDirectGetPcPayByUser(DirectInfo directInfo, Config config)
        {
            var partner = config.GetPid();
            Submit submit = new Submit(config);
            var sParaTemp = new SortedDictionary<string, string>
            {
                {"service", "create_direct_pay_by_user"},
                {"partner", partner},
                {"_input_charset", Config.InputCharset.ToLower()},
                {"payment_type", "1"},
                {"notify_url", directInfo.Notify},
                {"return_url", directInfo.Return},
                {"out_trade_no", directInfo.OutTradeNo},
                {"subject", directInfo.Subject},
                {"total_fee", directInfo.TotalFee.ToString("0.00")},
                {"show_url", directInfo.ShowUrl},
                {"seller_email", Config.SellerEmail},
            };
            string responseResult = submit.BuildRequest(sParaTemp);
            return responseResult;
        }
.................

支付通知：https://github.com/842549829/Fund/blob/master/Notify/Controllers/AliPayNoticeController.cs

/// <summary>
        /// 支付通知
        /// </summary>
        /// <returns>返回结果</returns>
        public ContentResult PayNotice()
        {
            
            var sPara = GetRequestPost();
            if (sPara.Count > 0)
            {
                // 签名验证
                var flg = AliPay.Notify.Verify(sPara, Request.Form["notify_id"], Request.Form["sign"], new AliPay.Model.Config{ });
                if (flg)
                {
                    //交易状态
                    string trade_status = Request.Form["trade_status"];

                    //商户订单号
                    string out_trade_no = Request.Form["out_trade_no"];

                    //支付宝交易号
                    string trade_no = Request.Form["trade_no"];

                    //获取总金额
                    decimal total_fee = Convert.ToDecimal(Request.Form["total_fee"]);

                    //买家支付宝账号
                    //string accocunt = Request.Form["buyer_email"];

                    //买家支付宝账号ID
                    string accountID = Request.Form["buyer_id"];

                    if (trade_status == "TRADE_SUCCESS")
                    {
                        // 处理业务
                        return new ContentResult { Content = "success" };
                    }
                    else
                    {
                        // 支付失败的通知直接返回结果不再来通知
                        return new ContentResult { Content = "success" };
                    }
                }
                else//验证失败
                {
                    return new ContentResult { Content = "fail" };
                }
            }
            else
            {
                return new ContentResult { Content = "无通知参数" };
            }
        }

新版本：https://github.com/842549829/Fund/blob/master/AliPay/CreateRequest.cs

/// <summary>
        /// 创建Sdk支付链接串(蚂蚁金服)
        /// </summary>
        /// <param name="directInfo">支付信息</param>
        /// <param name="config">config</param>
        /// <returns>请求连接</returns>
        public static string CreateDirectSdkPayByUser(DirectInfo directInfo, SdkPay.Config config)
        {
            const string url = SdkPay.Config.ServerUrl;
            string appId = config.GetAppId();
            string privateKeyPem = config.GetPrivateKeyPem();
            const string format = SdkPay.Config.Format;
            const string version = SdkPay.Config.Version;
            const string signType = SdkPay.Config.SignType;
            string publicKeyPem = config.GetPublicKeyPem();
            const string charset = SdkPay.Config.Charset;
            const string productCode = SdkPay.Config.ProductCode;
            string pid = config.GetPid();
            IAopClient client = new DefaultAopClient(url, appId, privateKeyPem, format, version, signType, publicKeyPem, charset, false);
            AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
            if (!string.IsNullOrWhiteSpace(directInfo.Notify))
            {
                request.SetNotifyUrl(directInfo.Notify);
            }
            if (!string.IsNullOrWhiteSpace(directInfo.Return))
            {
                request.SetReturnUrl(directInfo.Return);
            }
            AlipayTradeAppPayModel model = new AlipayTradeAppPayModel
            {
                Body = directInfo.ExtraCommonParam,
                Subject = directInfo.Subject,
                TotalAmount = directInfo.TotalFee.ToString("0.00"),
                ProductCode = productCode,
                OutTradeNo = directInfo.OutTradeNo,
                TimeoutExpress = "30m",
                SellerId = pid
            };
            request.SetBizModel(model);
            AlipayTradeAppPayResponse response = client.SdkExecute(request);
            var body = response.Body;
            return body;
        }

....................

支付通知： https://github.com/842549829/Fund/blob/master/Notify/Controllers/AliPayNoticeController.cs

/// <summary>
        /// 支付宝Sdk支付通知
        /// </summary>
        /// <returns>返回结果</returns>
        public ContentResult PaySdkNotice()
        {
            var sPara = GetRequestPost();
            if (sPara.Count > 0)
            {
                // 签名验证
                var flg = AliPay.Notify.VerifySdk(sPara, new AliPay.SdkPay.Config { });
                if (flg)
                {
                    //交易状态
                    string trade_status = Request.Form["trade_status"];

                    //商户订单号
                    string out_trade_no = Request.Form["out_trade_no"];

                    //支付宝交易号
                    string trade_no = Request.Form["trade_no"];

                    //获取总金额
                    decimal total_fee = Convert.ToDecimal(Request.Form["buyer_pay_amount"]);

                    // 订单金额（用于获取不到总金额的时候第二次验证）
                    decimal orderAmount = Convert.ToDecimal(Request.Form["total_amount"]);

                    //买家支付宝账号
                    string accocunt = Request.Form["buyer_logon_id"];

                    if (trade_status == "TRADE_SUCCESS")
                    {
                        try
                        {
                            if (total_fee <= 0)
                            {
                                total_fee = orderAmount;
                            }
                            // 处理业务
                            return new ContentResult { Content = "success" };
                        }
                        catch (Exception ex)
                        {
                            return new ContentResult { Content = "fail" };
                        }
                    }
                    else
                    {
                        // 支付失败的通知直接返回结果不再来通知
                        return new ContentResult { Content = "success" };
                    }
                }
                else//验证失败
                {
                    return new ContentResult { Content = "fail" };
                }
            }
            else
            {
                return new ContentResult { Content = "无通知参数" };
            }
        }

退款请去github下载源代码自己撸

github地址 ：https://github.com/842549829/Fund