.NETWEB支付宝接口实现方式

 

• 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("gb2312").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;  
      }  
    
      protected void Page_Load(object sender, EventArgs e)  
      {  
          ///当不知道https的时候，请使用http   
          //string alipayNotifyURL = "https://www.alipay.com/cooperate/gateway.do?";   
          string alipayNotifyURL = "http://notify.alipay.com/trade/notify_query.do?";  
    
          string partner = "";        //partner   
          string key = ""; //安全校验码    
          //alipayNotifyURL = alipayNotifyURL + "service=notify_verify" + "&partner=" + partner + "¬ify_id=" + Request.QueryString["notify_id"];   
           alipayNotifyURL = alipayNotifyURL + "&partner=" + partner + "¬ify_id=" + Request.QueryString["notify_id"];  
    
          string responseTxt = Get_Http(alipayNotifyURL, 120000);  
  //*********************************************************************************************   
          int i;  
          NameValueCollection coll;  
          //Load Form variables into NameValueCollection variable.   
          coll = Request.QueryString;  
    
          // 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 (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);  
    
              //生成Md5摘要；   
              string mysign = GetMD5(prestr.ToString());  
    
    
          string sign = Request.QueryString["sign"];  
    
    
    
          if (mysign == sign && responseTxt == "true")   //验证支付发过来的消息，签名是否正确   
          {  
    
              //更新自己数据库的订单语句，请自己填写一下   
    
    
    
              Response.Write("success");     //返回给支付宝消息，成功   
              Response.Write("<br>------------------" + Request.QueryString["body"]);  
          }  
          else  
            
              {  
                  Response.Write("fail");  
                  Response.Write("<br>------------------" + Request.QueryString["body"]);  
                    
              }   
            
      }