.net接入支付宝的支付接口

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

 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 = "***";

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;
 }

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;
 }

 [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");
 }
 }