寫本文章的目的是為了記錄工作中遇到的問題，方便以後遇到可以迅速解決問題

H5手機網站接入支付寶的支付接口，推薦使用支付寶提供的SDK來快速開發

我使用的是SDK開發

引用命名空間

using Aop.Api;
using Aop.Api.Request;
using Aop.Api.Response;
using Aop.Api.Util;

首頁需要定義一些常量

 static string serverUrl = "https://openapi.alipaydev.com/gateway.do";
        static string app_id = "**";   //開發者的應用ID
 

        static string format = "JSON";
        static string charset = "utf-8";
        static string sign_type = "RSA2";  //簽名格式
        static string version = "1.0";
        string UID = "2088102169707816";//賣家支付寶賬戶號
        //商戶私鑰
        static string merchant_private_key = "***";
        //支付寶公鑰
        static
 
 string alipay_public_key = "***";

這裏的app_id,merchant_private_key,alipay_public_key 我就沒有列出來了，獲取的方法需要自己去支付寶平臺完成一些操作進行獲取

在用戶點擊網站付款時，我們需要喚醒支付寶，來進行支付

public string H5RequestPayWay(OrderPO order)
        {
            IAopClient client = new DefaultAopClient(serverUrl, app_id, merchant_private_key, format, version, sign_type, alipay_public_key, charset, false
 
);
            AlipayTradeWapPayRequest request = new AlipayTradeWapPayRequest();
            string address= "http://m." + PathLogic1.RootDomain;
            request.SetReturnUrl(address+ "/WebPay/AlipayPayResult");//同步請求
            request.SetNotifyUrl(address + "/WebPay/AsyncPay");//異步請求
            var lstDetail = Context.Data.OrderDetail.Where(x => x.OrderNo == order.OrderNo).ToSelectList(x=>new { x.SkuName});
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < lstDetail.Count(); i++)
            {
                sb.Append(lstDetail[i].SkuName + ",");
            }
            request.BizContent = "{" +
    "\"body\":\""+sb.ToString().Substring(0,sb.Length-1)+"\"," +
    "\"subject\":\"袋鼠巴巴商品支付\"," +
    "\"out_trade_no\":\""+order.OrderNo+"\"," +
    "\"timeout_express\":\"90m\"," +
    "\"total_amount\":"+(order.TotalAmount.Value+order.TotalFreight.Value)+"," +
    "\"product_code\":\"QUICK_WAP_PAY\"" +
    "  }";

            AlipayTradeWapPayResponse response = client.pageExecute(request);
             return response.Body;
        }

具體發送給支付寶的參數，自行去查看

執行方法後，買家輸入自己的支付寶賬號密碼進行支付，支付成功的結果，支付寶會以post的方式異步請求你的SetNotifyUrl的地址

這個SetNotifyUrl的地址必須要外網可以訪問，支付寶的請求才能進來

買家支付成功，商家修改訂單狀態和數據庫的操作，都在異步請求中執行

同步請求

  public ActionResult AlipayPayResult()
        {
            ViewBag.result = "success";
            return View("PayResult");
        }

         /// <summary>
        /// 驗證通知數據的正確性
        /// </summary>
        /// <param name="out_trade_no"></param>
        /// <param name="total_amount"></param>
        /// <param name="seller_id"></param>
        /// <returns></returns> 
private SortedDictionary<string, string> GetRequestPost()
        {
            int i = 0;
            SortedDictionary<string, string> sArray = new SortedDictionary<string, string>();
            NameValueCollection coll;
            //Load Form variables into NameValueCollection variable.
            coll = Request.Form;

            // Get names of all forms into a string array.
            String[] requestItem = coll.AllKeys;

            for (i = 0; i < requestItem.Length; i++)
            {
                sArray.Add(requestItem[i], Request.Form[requestItem[i]]);
            }

            return sArray;
        }

  /// <summary>
        /// 驗簽
        /// </summary>
        /// <param name="inputPara"></param>
        /// <returns></returns>
        public Boolean  Verify(SortedDictionary<string, string> inputPara)
        {
            Dictionary<string, string> sPara = new Dictionary<string, string>();       
            Boolean verifyResult = AlipaySignature.RSACheckV1(inputPara, alipay_public_key, charset,sign_type,false);
            return verifyResult;
        }

異步請求：

 [HttpPost]
        public void AsyncPay()
        {
            SortedDictionary<string, string> sPara = GetRequestPost();//將post請求過來的參數傳化為SortedDictionary
            if (sPara.Count > 0)
            {
                AlipayTradeWayPayServer pay = new AlipayTradeWayPayServer();
                Boolean VerifyResult = pay.Verify(sPara);//驗簽if (VerifyResult)
                {
                    try
                    {
                         //商戶訂單號
                        string out_trade_no = Request.Form["out_trade_no"];
                        //支付寶交易號
                        string trade_no = Request.Form["trade_no"];
                        //支付金額
                        decimal total_amount = Request.Form["total_amount"].ConvertType(Decimal.Zero);
                        //實收金額
                        //decimal receipt_amount = Request.Form["receipt_amount"].ConvertType(Decimal.Zero);
                        //交易狀態
                        string trade_status = Request.Form["trade_status"];
                        //賣家支付寶賬號
                        string seller_id = Request.Form["seller_id"];

                        //商品描述
                        string body = Request.Form["body"];
                        //交易創建時間
                        DateTime gmt_create = DateTime.Parse(Request.Form["gmt_create"]);
                        //交易付款時間
                        DateTime gmt_payment = DateTime.Parse(Request.Form["gmt_payment"]);
                        string appid = Request.Form["app_id"];
                        WriteError("驗證參數開始");
                        Boolean DataValidity = pay.CheckInform(out_trade_no, total_amount, seller_id, appid);//商家判斷參數時候是否匹配if (DataValidity)
                        {
                            if (Request.Form["trade_status"] == "TRADE_FINISHED")
                            {
                                AlipayWayPayPO model = CreateAlipayWayPay(out_trade_no, trade_no, trade_status, gmt_create, gmt_payment);
                                pay.PaySuccess(out_trade_no, model, Server.MapPath("~/" + DateTime.Today.ToString("yyMMdd") + ".txt"));//修改訂單
                                //註意：
                                //退款日期超過可退款期限後（如三個月可退款），支付寶系統發送該交易狀態通知
                            }
                            else if (Request.Form["trade_status"] == "TRADE_SUCCESS")
                            {
                                AlipayWayPayPO model = CreateAlipayWayPay(out_trade_no, trade_no, trade_status, gmt_create, gmt_payment);
                                pay.PaySuccess(out_trade_no, model, Server.MapPath("~/" + DateTime.Today.ToString("yyMMdd") + ".txt"));//修改訂單
                                //註意：
                                //付款完成後，支付寶系統發送該交易狀態通知
                            }
                            else
                            {

                            }

                            //——請根據您的業務邏輯來編寫程序（以上代碼僅作參考）——

                            Response.Write("success");  //請不要修改或刪除

                            /////////////////////////////////////////////////////////////////////////////////////////////////////////////
                        }
                    }
                    catch (Exception ex)
                    {
                       
                    }
                }
                else//驗證失敗
                {
                    Response.Write("fail");
                }
            }
            else
            {
                Response.Write("無通知參數");
            }
        }

H5網站接入支付寶的支付接口