Detailed example of how to access Alipay's payment interface using .net

This article mainly introduces in detail the payment interface of .net access to Alipay, H5 website access the payment interface of Alipay, which has certain reference value and is of interest. Friends can refer to the payment interface of

H5 mobile website to access Alipay. It is recommended to use the SDK provided by Alipay for rapid development

I use the SDK development

QuoteNamespace

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

The home page needs to define some

constants

 static string serverUrl = "https://openapi.alipaydev.com/gateway.do";
    static string app_id = "**";  //开发者的应用ID
    static string format = "JSON";
    static string charset = "utf-8";
    static string sign_type = "RSA2"; //签名格式
    static string version = "1.0";
    string UID = "2088102169707816";//卖家支付宝账户号
    //商户私钥
    static string merchant_private_key = "***";
    //支付宝公钥
    static string alipay_public_key = "***";

I don’t have the app_id, merchant_private_key, alipay_public_key here Listed below, the acquisition method requires you to go to the Alipay platform to complete some operations to obtain it

When the user clicks on the website to pay, we need to wake up Alipay to make the payment

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");//同步请求
      request.SetNotifyUrl(address + "/WebPay/AsyncPay");//异步请求
      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;
    }

The specific information sent to Alipay Parameters, check by yourself

After executing the method, the buyer enters his/her Alipay account password to pay. If the payment is successful, Alipay will asynchronously request your SetNotifyUrl address in the form of post

The address of this SetNotifyUrl must be accessible from the external network so that Alipay requests can come in

Buyers pay successfully, merchants modify order

statusand database operations are all executed in asynchronous requests

Synchronous request

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

     /// <summary>
    /// 验证通知数据的正确性
    /// </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>
    /// 验签
    /// </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;
    }

Asynchronous request:

 [HttpPost]
    public void AsyncPay()
    {
      SortedDictionary<string, string> sPara = GetRequestPost();//将post请求过来的参数传化为SortedDictionary
      if (sPara.Count > 0)
      {
        AlipayTradeWayPayServer pay = new AlipayTradeWayPayServer();
        Boolean VerifyResult = pay.Verify(sPara);//验签if (VerifyResult)
        {
          try
          {
             //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"];
            //支付金额
            decimal total_amount = Request.Form["total_amount"].ConvertType(Decimal.Zero);
            //实收金额
            //decimal receipt_amount = Request.Form["receipt_amount"].ConvertType(Decimal.Zero);
            //交易状态
            string trade_status = Request.Form["trade_status"];
            //卖家支付宝账号
            string seller_id = Request.Form["seller_id"];

            //商品描述
            string body = Request.Form["body"];
            //交易创建时间
            DateTime gmt_create = DateTime.Parse(Request.Form["gmt_create"]);
            //交易付款时间
            DateTime gmt_payment = DateTime.Parse(Request.Form["gmt_payment"]);
            string appid = Request.Form["app_id"];
            WriteError("验证参数开始");
            Boolean DataValidity = pay.CheckInform(out_trade_no, total_amount, seller_id, appid);//商家判断参数时候是否匹配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"));//修改订单
                //注意：
                //退款日期超过可退款期限后（如三个月可退款），支付宝系统发送该交易状态通知
              }
              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"));//修改订单
                //注意：
                //付款完成后，支付宝系统发送该交易状态通知
              }
              else
              {

              }

              //——请根据您的业务逻辑来编写程序（以上代码仅作参考）——

              Response.Write("success"); //请不要修改或删除

              /////////////////////////////////////////////////////////////////////////////////////////////////////////////
            }
          }
          catch (Exception ex)
          {
            
          }
        }
        else//验证失败
        {
          Response.Write("fail");
        }
      }
      else
      {
        Response.Write("无通知参数");
      }
    }

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