C# 支付宝接口

生成url连接

using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Text;public partial class pay : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        Encoding gb2312 = Encoding.GetEncoding("gb2312");        Response.ContentEncoding = gb2312;        Request.ContentEncoding = gb2312;    }    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)    {        if (Request.Cookies[FormsAuthentication.FormsCookieName] != null)        {            Vlike_DB_read a = new Vlike_DB_read();            string zfb_ddh = a.get_zfb_id(Membership.GetUser().UserName, Convert.ToInt32(DropDownList1.SelectedValue));            Response.Redirect(img("0001", "包月", "影视包月  10元/月", zfb_ddh, "10.00", Membership.GetUser().UserName.ToUpper(), DropDownList1.SelectedValue));        }        else        {            Response.Write("<script type="text/javascript">alert("请先登陆!");</script>");        }    }    private string img(string strcmd, string strSub, string strSubinfo, string strid, string strMoney, string strUser, string strNum)    {        string strsellerEmail = "[e-mail]";          //卖家支付宝帐号        string strAc = "";            //卖家支付宝安全校验码        string INTERFACE_URL = "https://www.alipay.com/payto:";        string strCmd = strcmd;           //命令字        string strSubject = strSub;       //商品名        string strBody = strSubinfo;      //商品描述        string strOrder_no = strid;       //商户订单号        string strPrice = strMoney;       //商品单价 0.01～50000.00        string rurl = "http://";          //商品展示网址        string strType = "2";             //type支付类型    1：商品购买2：服务购买3：网络拍卖4：捐赠        string strNumber = strNum;        //购买数量        string strTransport = "3";        //发货方式        1：平邮2：快递3：虚拟物品        string strOrdinary_fee = "";      //平邮运费        string strExpress_fee = "";       //快递运费        string strReadOnly = "true";      //交易信息是否只读        string strBuyer_msg = "";         //买家给卖家的留言        string strBuyer = "";             //买家EMAIL        string strBuyer_name = strUser;   //买家姓名        string strBuyer_address = "";     //买家地址        string strBuyer_zipcode = "";     //买家邮编        string strBuyer_tel = "";         //买家电话号码        string strBuyer_mobile = "";      //买家手机号码        string strPartner = "";           //合作伙伴ID    保留字段        return CreatUrl(strsellerEmail, strAc, INTERFACE_URL, strCmd, strSubject, strBody,            strOrder_no, strPrice, rurl, strType, strNumber, strTransport,            strOrdinary_fee, strExpress_fee, strReadOnly, strBuyer_msg, strBuyer,            strBuyer_name, strBuyer_address, strBuyer_zipcode, strBuyer_tel,            strBuyer_mobile, strPartner);    }    private string CreatUrl(        string strsellerEmail,        string strAc,        string INTERFACE_URL,        string strCmd,        string strSubject,        string strBody,        string strOrder_no,        string strPrice,        string rurl,        string strType,        string strNumber,        string strTransport,        string strOrdinary_fee,        string strExpress_fee,        string strReadOnly,        string strBuyer_msg,        string strBuyer,        string strBuyer_name,        string strBuyer_address,        string strBuyer_zipcode,        string strBuyer_tel,        string strBuyer_mobile,        string strPartner)    {   //以下参数值不能留空        string str2CreateAc = "";        str2CreateAc += "cmd" + strCmd + "subject" + strSubject;        str2CreateAc += "body" + strBody;        str2CreateAc += "order_no" + strOrder_no;        str2CreateAc += "price" + strPrice;        str2CreateAc += "url" + rurl;        str2CreateAc += "type" + strType;        str2CreateAc += "number" + strNumber;        str2CreateAc += "transport" + strTransport;        str2CreateAc += "ordinary_fee" + strOrdinary_fee;        str2CreateAc += "express_fee" + strExpress_fee;        str2CreateAc += "readonly" + strReadOnly;        str2CreateAc += "buyer_msg" + strBuyer_msg;        str2CreateAc += "seller" + strsellerEmail;        str2CreateAc += "buyer" + strBuyer;        str2CreateAc += "buyer_name" + strBuyer_name;        str2CreateAc += "buyer_address" + strBuyer_address;        str2CreateAc += "buyer_zipcode" + strBuyer_zipcode;        str2CreateAc += "buyer_tel" + strBuyer_tel;        str2CreateAc += "buyer_mobile" + strBuyer_mobile;        str2CreateAc += "partner" + strPartner;        str2CreateAc += strAc;        string acCode = GetMD5(str2CreateAc);        string parameter = "";        parameter += INTERFACE_URL + strsellerEmail + "?cmd=" + strCmd;        parameter += "&subject=" + Server.UrlEncode(strSubject);        parameter += "&body=" + Server.UrlEncode(strBody);        parameter += "&order_no=" + strOrder_no;        parameter += "&url=" + rurl;        parameter += "&price=" + strPrice;        parameter += "&type=" + strType;        parameter += "&number=" + strNumber;        parameter += "&transport=" + strTransport;        parameter += "&ordinary_fee=" + strOrdinary_fee;        parameter += "&express_fee=" + strExpress_fee;        parameter += "&readonly=" + strReadOnly;        parameter += "&buyer_msg=" + strBuyer_msg;        parameter += "&buyer=" + strBuyer;        parameter += "&buyer_name=" + Server.UrlEncode(strBuyer_name);        parameter += "&buyer_address=" + strBuyer_address;        parameter += "&buyer_zipcode=" + strBuyer_zipcode;        parameter += "&buyer_tel=" + strBuyer_tel;        parameter += "&buyer_mobile=" + strBuyer_mobile;        parameter += "&partner=" + strPartner;        parameter += "&ac=" + acCode;        return parameter;    }    private static string GetMD5(string s)    {        System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();        byte[] t = md5.ComputeHash(System.Text.Encoding.GetEncoding("gb2312").GetBytes(s));        System.Text.StringBuilder sb = new System.Text.StringBuilder(32);        for (int i = 0; i < t.Length; i++)        {            sb.Append(t[i].ToString("x").PadLeft(2, "0"));        }        return sb.ToString();    }}

接收支付宝信息并进行相应操作 

<%@ Page Language="C#" %><%@ Import Namespace="System.Data.SqlClient" %><%@ Import Namespace="System.Data" %><%@ Import Namespace="System.Web" %><%@ Import Namespace="System.IO" %><%@ Import Namespace="System.Net" %><%@ Import Namespace="System.Text" %><%@ Import Namespace="System.Security.Cryptography" %><script type="text/C#" runat="server">private string returnTxt = "N";              //返回给支付宝通知接口的结果private string alipayNotifyURL = "http://notify.alipay.com/trade/notify_query.do?";    //支付宝查询接口URLprivate string myalipayEmail = "[e-mail]";            //商户的支付宝Emailprivate string constPaySecurityCode = "";                  //码private SqlConnection conn = new SqlConnection();private string GetMD5(string s){    System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();    byte[] t = md5.ComputeHash(System.Text.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();}private String Get_Http(String a_strUrl, int timeout){    string strResult;    try    {        System.Net.HttpWebRequest myReq = (System.Net.HttpWebRequest) System.Net.HttpWebRequest.Create(a_strUrl);        myReq.Timeout = timeout;        System.Net.HttpWebResponse HttpWResp = (System.Net.HttpWebResponse) myReq.GetResponse();        Stream myStream = HttpWResp.GetResponseStream();        StreamReader sr = new StreamReader(myStream, System.Text.Encoding.Default);        System.Text.StringBuilder strBuilder = new System.Text.StringBuilder();        while (-1 != sr.Peek())        {            strBuilder.Append(sr.ReadLine() + "\r\n");        }        strResult = strBuilder.ToString();    }    catch (Exception exp)    {        strResult = "错误：" + exp.Message;    }    return strResult;}public void send(string sql){    string dbconn = "data source=127.0.0.1;UID=Cm;PWD=fallenangel;database=text";    conn = new SqlConnection(dbconn);    conn.Open();    SqlCommand cmd = new SqlCommand(sql, conn);    int aa = cmd.ExecuteNonQuery();    conn.Close();}private void Page_Load(object sender, System.EventArgs e){    //检查支付宝通知接口传递过来的参数是否合法    string msg_id = System.Web.HttpContext.Current.Request["msg_id"];    string order_no = System.Web.HttpContext.Current.Request["order_no"];    string gross = System.Web.HttpContext.Current.Request["gross"];    string buyer_email = System.Web.HttpContext.Current.Request["buyer_email"];    string buyer_name = System.Web.HttpContext.Current.Request["buyer_name"];    string buyer_address = System.Web.HttpContext.Current.Request["buyer_address"];    string buyer_zipcode = System.Web.HttpContext.Current.Request["buyer_zipcode"];    string buyer_tel = System.Web.HttpContext.Current.Request["buyer_tel"];    string buyer_mobile = System.Web.HttpContext.Current.Request["buyer_mobile"];    string action = System.Web.HttpContext.Current.Request["action"];    string s_date = System.Web.HttpContext.Current.Request["date"];    string ac = System.Web.HttpContext.Current.Request["ac"];    string notify_type = System.Web.HttpContext.Current.Request["notify_type"];    alipayNotifyURL = alipayNotifyURL + "msg_id=" + msg_id + "&email=" + myalipayEmail + "&order_no=" + order_no;    //获取支付宝ATN返回结果，true和false都是正确的订单信息，invalid 是无效的    string responseTxt = Get_Http(alipayNotifyURL, 120000);    string Str = "msg_id" + msg_id + "order_no" + order_no + "gross" + gross + "buyer_email" + buyer_email + "buyer_name" + buyer_name + "buyer_address" + buyer_address + "buyer_zipcode" + buyer_zipcode + "buyer_tel" + buyer_tel + "buyer_mobile" + buyer_mobile + "action" + action + "date" + s_date + constPaySecurityCode;    string ac_code = GetMD5(Str);    if (action == "test") //支付宝接口测试是否有效    {        returnTxt = "Y";    }    if (action == "sendOff")  //发货通知    {        if (responseTxt.Substring(0, 4) == "true"             || responseTxt.Substring(0, 4) == "fals")//ATN，验证消息是否支付宝发过来         {            if (ac_code == ac)//验证消息是否被修改            {                //数据库操作            }        }    }    if (action == "checkOut")  //交易完成通知     {        returnTxt = "N";        if (responseTxt.Substring(0, 4) == "true"            || responseTxt.Substring(0, 4) == "fals")//ATN，验证消息是否支付宝发过来         {            if (ac_code == ac)//验证消息是否被修改            {                //数据库操作                }        }    }    System.Web.HttpContext.Current.Response.Write(returnTxt);}</script>