c# 实现的支付宝支付

C#支付宝扫码支付示的具体代码，供大家参考，具体内容如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web; 

namespace ZK_ECommerce.Shop.pay.alipay
{
 public class AliPay
 { 

  public static string GetMD5(string s, string _input_charset)
  { 

   /// <summary>
   /// 与ASP兼容的MD5加密算法
   /// </summary> 

   MD5 md5 = new MD5CryptoServiceProvider();
   byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
   StringBuilder sb = new StringBuilder(32);
   for (int i = 0; i < t.Length; i++)
   {
    sb.Append(t[i].ToString("x").PadLeft(2, '0'));
   }
   return sb.ToString();
  } 

  public static string[] BubbleSort(string[] r)
  {
   /// <summary>
   /// 冒泡排序法
   /// </summary> 

   int i, j; //交换标志
   string temp; 

   bool exchange; 

   for (i = 0; i < r.Length; i++) //最多做R.Length-1趟排序
   {
    exchange = false; //本趟排序开始前，交换标志应为假 

    for (j = r.Length - 2; j >= i; j--)
    {
     if (System.String.CompareOrdinal(r[j + 1], r[j]) < 0)　//交换条件
     {
      temp = r[j + 1];
      r[j + 1] = r[j];
      r[j] = temp; 

      exchange = true; //发生了交换，故将交换标志置为真
     }
    } 

    if (!exchange) //本趟排序未发生交换，提前终止算法
    {
     break;
    } 

   }
   return r;
  } 

  public string CreatUrl(
   string gateway,
   string service,
   string partner,
   string sign_type,
   string out_trade_no,
   string subject,
   string body,
   string payment_type,
   string total_fee,
   string show_url,
   string seller_email,
   string key,
   string return_url,
   string _input_charset,
   string notify_url,
   string extra_common_param = ""
   )
  {
   return CreatUrl(
   gateway,
   service,
   partner,
   sign_type,
   out_trade_no,
   subject,
   body,
   payment_type,
   total_fee,
   show_url,
   seller_email,
   key,
   return_url,
   _input_charset,
   notify_url,
   "",
   extra_common_param);
  } 

  public string CreatUrl(
   string gateway,
   string service,
   string partner,
   string sign_type,
   string out_trade_no,
   string subject,
   string body,
   string payment_type,
   string total_fee,
   string show_url,
   string seller_email,
   string key,
   string return_url,
   string _input_charset,
   string notify_url,
   string token,
   string extra_common_param = ""
   )
  {
   /// <summary>
   ///2015年11月17日14:08:00
   /// </summary>
   int i;
   string[] Oristr;
   //构造数组；
   if (!string.IsNullOrEmpty(token))
   {
    if (extra_common_param == "COD2MOTOPAY")
    {
     Oristr = new[]{
     "service="+service,
     "partner=" + partner,
     "subject=" + subject,
     "body=" + body,
     "out_trade_no=" + out_trade_no,
     "total_fee=" + total_fee,
     "show_url=" + show_url,
     "payment_type=" + payment_type,
     "seller_email=" + seller_email,
     "notify_url=" + notify_url,
     "_input_charset="+_input_charset,
     "return_url=" + return_url,
     "token="+token,
     "extra_common_param="+extra_common_param
     };
    }
    else
    {
     Oristr = new[]{
     "service="+service,
     "partner=" + partner,
     "subject=" + subject,
     "body=" + body,
     "out_trade_no=" + out_trade_no,
     "total_fee=" +total_fee,
     "show_url=" + show_url,
     "payment_type=" + payment_type,
     "seller_email=" + seller_email,
     "notify_url=" + notify_url,
     "_input_charset="+_input_charset,
     "return_url=" + return_url,
     "token="+token
     };
    } 

   }
   else
   {
    if (extra_common_param == "COD2MOTOPAY")
    {
     Oristr = new[]{
     "service="+service,
     "partner=" + partner,
     "subject=" + subject,
     "body=" + body,
     "out_trade_no=" + out_trade_no,
     "total_fee="+total_fee,
     "show_url=" + show_url,
     "payment_type=" + payment_type,
     "seller_email=" + seller_email,
     "notify_url=" + notify_url,
     "_input_charset="+_input_charset,
     "return_url=" + return_url,
     "extra_common_param="+extra_common_param
     };
    }
    else
    {
     Oristr = new[]{
     "service="+service,
     "partner=" + partner,
     "subject=" + subject,
     "body=" + body,
     "out_trade_no=" + out_trade_no,
     "total_fee=" + total_fee,
     "show_url=" + show_url,
     "payment_type=" + payment_type,
     "seller_email=" + seller_email,
     "notify_url=" + notify_url,
     "_input_charset="+_input_charset,
     "return_url=" + return_url
     };
    } 

   }
   //进行排序；
   string[] Sortedstr = BubbleSort(Oristr); 

   //构造待md5摘要字符串 ； 

   StringBuilder prestr = new StringBuilder(); 

   for (i = 0; i < Sortedstr.Length; i++)
   {
    if (i == Sortedstr.Length - 1)
    {
     prestr.Append(Sortedstr[i]); 

    }
    else
    { 

     prestr.Append(Sortedstr[i] + "&");
    } 

   } 

   prestr.Append(key); 

   //生成Md5摘要；
   string sign = GetMD5(prestr.ToString(), _input_charset); 

   //构造支付Url；
   char[] delimiterChars = { '=' };
   StringBuilder parameter = new StringBuilder();
   parameter.Append(gateway);
   for (i = 0; i < Sortedstr.Length; i++)
   { 

    parameter.Append(Sortedstr[i].Split(delimiterChars)[0] + "=" + HttpUtility.UrlEncode(Sortedstr[i].Split(delimiterChars)[1]) + "&");
   } 

   parameter.Append("sign=" + sign + "&sign_type=" + sign_type); 

   //返回支付Url；
   return parameter.ToString(); 

  } 

  public string CreatUrl_MissPayments(
        string gateway,
        string service,
        string partner,
        string sign_type,
        string out_trade_no,
        string key,
        string _input_charset 

   )
  {
   /// <summary>
   /// created by sunzhizhi 2006.5.21,sunzhizhi@msn.com。
   /// </summary>
   int i; 

   //构造数组；
   string[] Oristr ={
    "service="+service,
    "partner=" + partner,
    "out_trade_no=" + out_trade_no,
    "_input_charset="+_input_charset   

    }; 

   //进行排序；
   string[] Sortedstr = BubbleSort(Oristr); 

   //构造待md5摘要字符串 ； 

   StringBuilder prestr = new StringBuilder(); 

   for (i = 0; i < Sortedstr.Length; i++)
   {
    if (i == Sortedstr.Length - 1)
    {
     prestr.Append(Sortedstr[i]); 

    }
    else
    { 

     prestr.Append(Sortedstr[i] + "&");
    } 

   } 

   prestr.Append(key); 

   //生成Md5摘要；
   string sign = GetMD5(prestr.ToString(), _input_charset); 

   //构造支付Url；
   char[] delimiterChars = { '=' };
   StringBuilder parameter = new StringBuilder();
   parameter.Append(gateway);
   for (i = 0; i < Sortedstr.Length; i++)
   { 

    parameter.Append(Sortedstr[i].Split(delimiterChars)[0] + "=" + HttpUtility.UrlEncode(Sortedstr[i].Split(delimiterChars)[1]) + "&");
   } 

   parameter.Append("sign=" + sign + "&sign_type=" + sign_type); 

   //返回支付Url；
   return parameter.ToString(); 

  } 

  public static string GetTranSign(string TranData)
  {
   if (string.IsNullOrWhiteSpace(TranData))
    return null;
   string sign = GetMD5(TranData + "alskdjfaow;fjel;asdjf", "utf-8");
   return sign;
  } 

 }
}

页面处理：

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Web.Mvc;
using ZK_ECommerce.Shop.pay.alipay; 

namespace Alipay.Controllers
{
 public class ApliayDemoController : Controller
 {
  /// <summary>
  /// 支付页面
  /// </summary>
  /// <param name="ordercode"></param>
  /// <returns></returns>
  public ActionResult Index(string ordercode)
  { 

   string out_trade_no = ordercode;
   string gateway = "https://mapi.alipay.com/gateway.do?"; //支付接口
   string service = "create_direct_pay_by_user";
   string partner = "";  //partner合作伙伴ID保留字段
   string sign_type = "MD5";
   string payment_type = "1";     //支付类型
   string show_url = "http://www.letao.com";
   string seller_email = "";    //卖家账号
   string key = "";    //partner账户的支付宝安全校验码
   string return_url = "http://localhost:1396/ApliayDemo/ApliyReturn"; //服务器通知返回接口
   string notify_url = "http://localhost:1396/ApliayDemo/AlipayNotify"; //服务器通知返回接口
   string _input_charset = "utf-8";
   string extra_common_param = "COD2MOTOPAY";//表示快捷支付
   string token = string.Empty;
   if (string.IsNullOrEmpty(token))
    token = "";
   string subject = "康康体检套餐"; // subject商品名称
   string body = "测试商品"; //商品描述
   string total_fee = "0.01";
   AliPay ap = new AliPay();
   string aliay_url = ap.CreatUrl(gateway, service, partner, sign_type, out_trade_no, subject, body, payment_type,
           total_fee, show_url, seller_email, key, return_url, _input_charset, notify_url, token, extra_common_param); 

   return Redirect(aliay_url); 

  } 

  /// <summary>
  /// 返回通知页面
  /// </summary>
  /// <returns></returns>
  public ActionResult ApliyReturn()
  { 

   string alipayNotifyURL = "https://mapi.alipay.com/gateway.do?";
   string key = ""; //partner 的对应交易安全校验码（必须填写）
   string _input_charset = "utf-8";
   string partner = "";  //partner合作伙伴id（必须填写） 

   alipayNotifyURL = alipayNotifyURL + "service=notify_verify" + "&partner=" + partner + "¬ify_id=" + Request.QueryString["notify_id"]; 

   //获取支付宝ATN返回结果，true是正确的订单信息，false 是无效的
   string responseTxt = Get_Http(alipayNotifyURL, 120000); 

   int i;
   NameValueCollection coll;
   coll = Request.QueryString;
   String[] requestarr = coll.AllKeys;
   //进行排序；
   string[] Sortedstr = BubbleSort(requestarr); 

   //构造待md5摘要字符串 ； 

   StringBuilder prestr = new StringBuilder(); 

   for (i = 0; i < Sortedstr.Length; i++)
   {
    if (Request.Form[Sortedstr[i]] != "" && Sortedstr[i] != "sign" && Sortedstr[i] != "sign_type")
    {
     if (i == Sortedstr.Length - 1)
     {
      prestr.Append(Sortedstr[i] + "=" + Request.QueryString[Sortedstr[i]]);
     }
     else
     {
      prestr.Append(Sortedstr[i] + "=" + Request.QueryString[Sortedstr[i]] + "&"); 

     }
    } 

   } 

   prestr.Append(key);
   string mysign = GetMD5(prestr.ToString(), _input_charset);
   string sign = Request.QueryString["sign"];
   string trade_status = Request.QueryString["trade_status"]; 

   if (mysign == sign && responseTxt == "true" && trade_status == "TRADE_SUCCESS") //验证支付发过来的消息，签名是否正确
   {
    string order_amount = Request.QueryString["total_fee"].ToString().Trim();
    string order_code = Request.QueryString["out_trade_no"].ToString().Trim(); 

    //updateOrder(order_code);//更新订单状态
    Response.Redirect(""); //跳转到支付成功页面
   }
   else
   { 

    Response.Write("支付失败。");
    Response.Write("<br>Result:responseTxt=" + responseTxt);
    Response.Write("<br>Result:mysign=" + mysign);
    Response.Write("<br>Result:sign=" + sign);
   }
   return View();
  } 

  /// <summary>
  /// 支付回调页面
  /// </summary>
  /// <returns></returns>
  public ActionResult AlipayNotify()
  { 

   string alipayNotifyURL = "https://mapi.alipay.com/gateway.do?";
   string partner = "";  //partner合作伙伴id（必须填写）
   string key = ""; //partner 的对应交易安全校验码（必须填写） 

   alipayNotifyURL = alipayNotifyURL + "service=notify_verify" + "&partner=" + partner + "¬ify_id=" + Request.Form["notify_id"]; 

   //获取支付宝ATN返回结果，true是正确的订单信息，false 是无效的
   string responseTxt = Get_Http(alipayNotifyURL, 120000); 

   int i;
   NameValueCollection coll;
   //Load Form variables into NameValueCollection variable.
   coll = Request.Form; 

   // Get names of all forms into a string array.
   String[] requestarr = coll.AllKeys;
   //进行排序；
   string[] Sortedstr = BubbleSort(requestarr);
   //构造待md5摘要字符串 ；
   StringBuilder prestr = new StringBuilder(); 

   for (i = 0; i < Sortedstr.Length; i++)
   {
    if (Request.Form[Sortedstr[i]] != "" && Sortedstr[i] != "sign" && Sortedstr[i] != "sign_type")
    {
     if (i == Sortedstr.Length - 1)
     {
      prestr.Append(Sortedstr[i] + "=" + Request.QueryString[Sortedstr[i]]);
     }
     else
     {
      prestr.Append(Sortedstr[i] + "=" + Request.QueryString[Sortedstr[i]] + "&"); 

     }
    } 

   } 

   prestr.Append(key);
   string mysign = GetMD5(prestr.ToString());
   string sign = Request.QueryString["sign"];
   string trade_status = Request.QueryString["trade_status"]; 

   if (mysign == sign && responseTxt == "true" && trade_status == "TRADE_SUCCESS") //验证支付发过来的消息，签名是否正确
   {
    string order_amount = Request.QueryString["total_fee"].ToString().Trim();
    string order_code = Request.QueryString["out_trade_no"].ToString().Trim(); 

    // updateOrder(order_code);//更新订单状态
    Response.Redirect(""); //跳转到支付成功页面
   }
   else
   { 

    Response.Write("支付失败。");
    Response.Write("<br>Result:responseTxt=" + responseTxt);
    Response.Write("<br>Result:mysign=" + mysign);
    Response.Write("<br>Result:sign=" + sign);
   }
   return View();
  } 

  public static string GetMD5(string s, string _input_charset)
  {
   /// <summary>
   /// 与ASP兼容的MD5加密算法
   /// </summary> 

   MD5 md5 = new MD5CryptoServiceProvider();
   byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
   StringBuilder sb = new StringBuilder(32);
   for (int i = 0; i < t.Length; i++)
   {
    sb.Append(t[i].ToString("x").PadLeft(2, '0'));
   }
   return sb.ToString();
  } 

  public static string GetMD5(string s)
  {
   /// <summary>
   /// 与ASP兼容的MD5加密算法
   /// </summary> 

   MD5 md5 = new MD5CryptoServiceProvider();
   byte[] t = md5.ComputeHash(Encoding.GetEncoding("utf-8").GetBytes(s));
   StringBuilder sb = new StringBuilder(32);
   for (int i = 0; i < t.Length; i++)
   {
    sb.Append(t[i].ToString("x").PadLeft(2, '0'));
   }
   return sb.ToString();
  } 

  public static string[] BubbleSort(string[] r)
  {
   /// <summary>
   /// 冒泡排序法
   /// </summary> 

   int i, j; //交换标志
   string temp; 

   bool exchange; 

   for (i = 0; i < r.Length; i++) //最多做R.Length-1趟排序
   {
    exchange = false; //本趟排序开始前，交换标志应为假 

    for (j = r.Length - 2; j >= i; j--)
    {
     if (System.String.CompareOrdinal(r[j + 1], r[j]) < 0)　//交换条件
     {
      temp = r[j + 1];
      r[j + 1] = r[j];
      r[j] = temp; 

      exchange = true; //发生了交换，故将交换标志置为真
     }
    } 

    if (!exchange) //本趟排序未发生交换，提前终止算法
    {
     break;
    } 

   }
   return r;
  }
  //获取远程服务器ATN结果
  public String Get_Http(String a_strUrl, int timeout)
  {
   string strResult;
   try
   { 

    HttpWebRequest myReq = (HttpWebRequest)HttpWebRequest.Create(a_strUrl);
    myReq.Timeout = timeout;
    HttpWebResponse HttpWResp = (HttpWebResponse)myReq.GetResponse();
    Stream myStream = HttpWResp.GetResponseStream();
    StreamReader sr = new StreamReader(myStream, Encoding.Default);
    StringBuilder strBuilder = new StringBuilder();
    while (-1 != sr.Peek())
    {
     strBuilder.Append(sr.ReadLine());
    } 

    strResult = strBuilder.ToString();
   }
   catch (Exception exp)
   { 

    strResult = "错误：" + exp.Message;
   } 

   return strResult;
  } 

 }
}

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