H5网站接入支付宝的支付接口

写本文章的目的是为了记录工作中遇到的问题，方便以后遇到可以迅速解决问题

H5手机网站接入支付宝的支付接口，推荐使用支付宝提供的SDK来快速开发

我使用的是SDK开发

引用命名空间

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

首页需要定义一些常量

 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 = "***";

这里的app_id,merchant_private_key,alipay_public_key 我就没有列出来了，获取的方法需要自己去支付宝平台完成一些操作进行获取

在用户点击网站付款时，我们需要唤醒支付宝，来进行支付

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\"" +
    "  }";//这里填写一些发送给支付宝的一些参数

            AlipayTradeWapPayResponse response = client.pageExecute(request);
             return response.Body;//这里会发送一个表单输出到页面中
        }

具体发送给支付宝的参数，自行去查看

执行上面方法后，买家输入自己的支付宝账号密码进行支付，支付成功的结果，支付宝会以post的方式异步请求你的SetNotifyUrl的地址

这个SetNotifyUrl的地址必须要外网可以访问，支付宝的请求才能进来

买家支付成功，商家修改订单状态和数据库的操作，都在异步请求中执行

同步请求

  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;
        }

异步请求：

 [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);//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);//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");
            }
        }