本文将带你了解微信开发微信企业付款开发 C#，希望本文对大家学微信有所帮助。

一、第一步：需要准备的东东

       　　　　                           // 开发者应用ID ，如图一

            //开发者应用密钥，如图一

         //商户秘钥               如图二

          　　　　　　　　　　　　　　　　// 商户号                申请微信支付通过后，收到的邮件里面有， 10位的商户号

      (图一)，登录地址：https://mp.weixin.qq.com/

 （图二，你自己设置的32位秘钥），登录地址：https://pay.weixin.qq.com/index.php/home/login?return_url=%2F

二、第二步：安装证书，windows下面选择.p12格式的证书；取证书时一定得用   绝对路径（如：D:\wwwroot\BusinessCard\weixin\businesscard\cert\apiclient_cert.p12）

          证书pkcs12格式 (apiclient_cert.p12)

三、第三步：帐户里面必须有钱，如下图

四、第四步：源码如下：

using   System;using System.Collections.Generic;using System.IO;using   System.Linq;using System.Net;using System.Net.Security;using   System.Security.Cryptography;using   System.Security.Cryptography.X509Certificates;using System.Text;using   System.Web;namespace BusinessCard.Web.Code{      public class Class1    {        ///        /// 企业付款给个人，直接入帐到微信钱包中        ///        public static string TENPAY =   "1";        public static   string APPID = Vincent._WebConfig.GetAppSettingsString("sAppID");              //开发者应用ID        public static string PARTNER =   Vincent._WebConfig.GetAppSettingsString("sPartner");          //商户号        public static string APPSECRET =   Vincent._WebConfig.GetAppSettingsString("sAppSecret");      //开发者应用密钥        public static string PARTNER_KEY =   Vincent._WebConfig.GetAppSettingsString("sPartnerKey");   //商户秘钥        public const string URL =   "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";        //服务器异步通知页面路径(流量卡)        public static string WebUrl =   Vincent._WebConfig.GetAppSettingsString("WebUrl");        public static readonly string   NOTIFY_URL_Card_Store = "//" + WebUrl +   "/weixinpay/WXPayNotify_URL.aspx";//   ConfigurationManager.AppSettings["WXPayNotify_URL_CardStore"].ToString();        public static readonly string   NOTIFY_URL_Card_User = "//" + WebUrl +   "/weixinpay/WXPayNotify_URL.aspx";   //ConfigurationManager.AppSettings["WXPayNotify_URL_CardUser"].ToString();        public static readonly string   NOTIFY_URL_HB_Store = "//" + WebUrl +   "/weixinpay/WXPayNotify_URL.aspx";//   ConfigurationManager.AppSettings["WXPayNotify_URL_CardStore"].ToString();          //=======【代理服务器设置】===================================        /*   默认IP和端口号分别为0.0.0.0和0，此时不开启代理（如有需要才设置）          */        public const string   PROXY_URL = "//10.152.18.220:8080";          //=======【证书路径设置】=====================================         /* 证书路径,注意应该填写绝对路径（仅退款、撤销订单时需要）        */        public const string SSLCERT_PATH =   "weixin\\businesscard\\cert\\apiclient_cert.p12";        public static string SSLCERT_PASSWORD   = PARTNER;        ///          /// 企业付款给个人        ///               ///        public static string   EnterprisePay(string Bill_No, string toOpenid, decimal Charge_Amt, string   userName, string title)        {            //公众账号appid mch_appid 是   wx8888888888888888 String 微信分配的公众账号ID（企业号corpid即为此appId）             //商户号 mchid 是 1900000109   String(32) 微信支付分配的商户号             //设备号   device_info 否 013467007045764 String(32) 微信支付分配的终端设备号             //随机字符串 nonce_str 是   5K8264ILTKCH16CQ2502SI8ZNMTM67VS String(32) 随机字符串，不长于32位             //签名 sign 是   C380BEC2BFD727A4B6845133519F3AD6 String(32) 签名，详见签名算法             //商户订单号 partner_trade_no 是   10000098201411111234567890 String 商户订单号，需保持唯一性             //用户openid openid 是   oxTWIuGaIt6gTKsQRLau2M0yL16E String 商户appid下，某用户的openid             //校验用户姓名选项 check_name 是   OPTION_CHECK String NO_CHECK：不校验真实姓名               //FORCE_CHECK：强校验真实姓名（未实名认证的用户会校验失败，无法转账）               //OPTION_CHECK：针对已实名认证的用户才校验真实姓名（未实名认证用户不校验，可以转账成功）             //收款用户姓名 re_user_name 可选 马花花   String 收款用户真实姓名。             //   如果check_name设置为FORCE_CHECK或OPTION_CHECK，则必填用户真实姓名             //金额 amount 是 10099 int   企业付款金额，单位为分             //企业付款描述信息 desc   是 理赔 String 企业付款操作说明信息。必填。               //Ip地址 spbill_create_ip 是 192.168.0.1 String(32) 调用接口的机器Ip地址             Bill_No = PARTNER +   getTimestamp() + Bill_No;  //订单号组成 商户号   + 随机时间串 + 记录ID              //设置package订单参数              SortedDictionarydic = new   SortedDictionary();            string total_fee = (Charge_Amt *   100).ToString("f0");              string wx_nonceStr = Guid.NewGuid().ToString().Replace("-",   "");      //Interface_WxPay.getNoncestr();            dic.Add("mch_appid",   APPID);              dic.Add("mchid", PARTNER);//财付通帐号商家              //dic.Add("device_info",   "013467007045711");//可为空              dic.Add("nonce_str", wx_nonceStr);              dic.Add("partner_trade_no", Bill_No);            dic.Add("openid",   toOpenid);              dic.Add("check_name", "NO_CHECK");            dic.Add("amount",   total_fee);            dic.Add("desc",   title);//商品描述              dic.Add("spbill_create_ip",   "211.149.234.224");     //用户的公网ip，不是商户服务器IP              //生成签名            string   get_sign = BuildRequest(dic, PARTNER_KEY);              Vincent._Log.SaveMessage("第一步 get_sign：" + get_sign);            string _req_data =   "";              _req_data += "" + APPID +   "";              _req_data += "" + PARTNER +   "";              _req_data += "" + wx_nonceStr +   "";              _req_data += "" + Bill_No +   "";            _req_data +=   "" + toOpenid + "";            _req_data +=   "NO_CHECK";            _req_data +=   "" + total_fee + "";            _req_data +=   "" + title + "";            _req_data +=   "211.149.234.224";            _req_data +=   "" + get_sign + "";            _req_data += "";              Vincent._Log.SaveMessage("企业付款生成的xml：" +   _req_data.Trim());            var   result = HttpPost(URL, _req_data.Trim(), true, 300);            //var result = HttpPost(URL,   _req_data, Encoding.UTF8);              Vincent._Log.SaveMessage("返回结果：" + result);            return result;            //ReturnValue retValue =   StreamReaderUtils.StreamReader(URL, Encoding.UTF8.GetBytes(_req_data),   System.Text.Encoding.UTF8, true);              //Vincent._Log.SaveMessage("返回结果：" +   retValue.ErrorCode);              //return retValue.ErrorCode;                    }        public static string   getTimestamp()        {            TimeSpan ts = DateTime.UtcNow -   new DateTime(1970, 1, 1, 0, 0, 0, 0);            return Convert.ToInt64(ts.TotalSeconds).ToString();        }        public static string   BuildRequest(SortedDictionarysParaTemp,   string key)        {            //获取过滤后的数组            DictionarydicPara = new Dictionary();            dicPara =   FilterPara(sParaTemp);              //组合参数数组            string   prestr = CreateLinkString(dicPara);              //拼接支付密钥            string   stringSignTemp = prestr + "&key=" + key;            Vincent._Log.SaveMessage("生成签名的参数："   + stringSignTemp);            //获得加密结果            string myMd5Str =   GetMD5(stringSignTemp.Trim());              //返回转换为大写的加密串            return   myMd5Str.ToUpper();        }        ///        /// 除去数组中的空值和签名参数并以字母a到z的顺序排序        ///        ///过滤前的参数组          ///过滤后的参数组        public static DictionaryFilterPara(SortedDictionarydicArrayPre)          {              DictionarydicArray = new   Dictionary();            foreach (KeyValuePairtemp in dicArrayPre)            {                if (temp.Key !=   "sign" && !string.IsNullOrEmpty(temp.Value))                {                    dicArray.Add(temp.Key,   temp.Value);                }            }            return dicArray;        }          //组合参数数组        public static   string CreateLinkString(Dictionary  dicArray)        {            StringBuilder prestr = new   StringBuilder();            foreach   (KeyValuePairtemp in dicArray)            {                prestr.Append(temp.Key +   "=" + temp.Value + "&");            }            int nLen = prestr.Length;            prestr.Remove(nLen - 1, 1);            return prestr.ToString();        }        //加密        public static string GetMD5(string   pwd)        {            MD5 md5Hasher =   MD5.Create();            byte[] data =   md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(pwd));            StringBuilder sBuilder = new   StringBuilder();            for (int i   = 0; i < data.Length; i++)              {                  sBuilder.Append(data[i].ToString("x2"));            }            return sBuilder.ToString();        }        public static string HttpPost(string   postUrl, string paramData, Encoding dataEncode)        {            string ret = string.Empty;            try            {                byte[] byteArray =   dataEncode.GetBytes(paramData); //转化                HttpWebRequest webReq =   (HttpWebRequest)WebRequest.Create(new Uri(postUrl));                webReq.Method = "POST";                webReq.ContentType =   "application/x-www-form-urlencoded";                webReq.ContentLength =   byteArray.Length;                Stream   newStream = webReq.GetRequestStream();                newStream.Write(byteArray, 0,   byteArray.Length);//写入参数                  newStream.Close();                  HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();                StreamReader sr = new   StreamReader(response.GetResponseStream(), Encoding.Default);                ret = sr.ReadToEnd();                sr.Close();                response.Close();                newStream.Close();            }            catch (Exception ex)            {                  Vincent._Log.SaveMessage("Post提交异常：" + ex.Message);            }            return ret;        }        public static bool   CheckValidationResult(object sender, X509Certificate certificate, X509Chain   chain, SslPolicyErrors errors)          {            //直接确认，否则打不开                return true;        }        ///        /// post提交支付        ///        ///          ///        ///是否使用证书          ///        ///        public static string HttpPost(string   url, string xml, bool isUseCert, int timeout)        {            System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接            string result =   "";//返回结果              HttpWebRequest request = null;            HttpWebResponse response =   null;            Stream reqStream =   null;            try            {                //设置最大连接数                  ServicePointManager.DefaultConnectionLimit = 200;                //设置https验证方式                if (url.StartsWith("https",   StringComparison.OrdinalIgnoreCase))                {                      ServicePointManager.ServerCertificateValidationCallback =                            new   RemoteCertificateValidationCallback(CheckValidationResult);                }                  /***************************************************************                *   下面设置HttpWebRequest的相关属性                  * ************************************************************/                request =   (HttpWebRequest)WebRequest.Create(url);                request.Method =   "POST";                  request.Timeout = timeout * 1000;                //设置代理服务器                //WebProxy proxy = new   WebProxy();                            //定义一个网关对象                  //proxy.Address = new Uri(PROXY_URL);              //网关服务器端口:端口                //request.Proxy = proxy;                //设置POST的数据类型和长度                request.ContentType =   "text/xml";                  byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);                request.ContentLength =   data.Length;                  //是否使用证书                if   (isUseCert)                {                    string path =   HttpContext.Current.Request.PhysicalApplicationPath;                    //X509Certificate2 cert =   new X509Certificate2(path + SSLCERT_PATH, SSLCERT_PASSWORD);                    //将上面的改成                    X509Certificate2 cert =   new X509Certificate2(path + SSLCERT_PATH, SSLCERT_PASSWORD,   X509KeyStorageFlags.PersistKeySet |   X509KeyStorageFlags.MachineKeySet);//线上发布需要添加                      request.ClientCertificates.Add(cert);                      Vincent._Log.SaveMessage("证书路径：" + (path +   SSLCERT_PATH));                      //Vincent._Log.SaveMessage("WxPayApi:PostXml used   cert");                }                //往服务器写入数据                reqStream =   request.GetRequestStream();                  reqStream.Write(data, 0, data.Length);                reqStream.Close();                //获取服务端返回                response =   (HttpWebResponse)request.GetResponse();                //获取服务端返回数据                StreamReader sr = new   StreamReader(response.GetResponseStream(), Encoding.UTF8);                result =   sr.ReadToEnd().Trim();                  sr.Close();            }            catch   (System.Threading.ThreadAbortException e)            {                  Vincent._Log.SaveMessage("HttpService:Thread - caught   ThreadAbortException - resetting.");                  Vincent._Log.SaveMessage("Exception message:" +   e.Message);                  System.Threading.Thread.ResetAbort();            }            catch (WebException e)            {                  Vincent._Log.SaveMessage("HttpService" + e.ToString());                if (e.Status ==   WebExceptionStatus.ProtocolError)                {                      Vincent._Log.SaveMessage("HttpService:StatusCode : " +   ((HttpWebResponse)e.Response).StatusCode);                      Vincent._Log.SaveMessage("HttpService:StatusDescription : "   + ((HttpWebResponse)e.Response).StatusDescription);                }                throw new   Exception(e.ToString());              }            catch (Exception   e)            {                  Vincent._Log.SaveMessage("HttpService" + e.ToString());                throw new   Exception(e.ToString());              }            finally            {                //关闭连接和流                if (response != null)                {                    response.Close();                }                if (request != null)                {                    request.Abort();                }            }            return result;        }        ///        /// 处理http GET请求，返回数据        ///        ///请求的url地址          ///http GET成功后返回的数据，失败抛WebException异常        public static string Get(string   url)        {            System.GC.Collect();            string result =   "";            HttpWebRequest   request = null;              HttpWebResponse response = null;            //请求url以获取数据            try            {                //设置最大连接数                ServicePointManager.DefaultConnectionLimit   = 200;                  //设置https验证方式                if   (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))                {                      ServicePointManager.ServerCertificateValidationCallback =                            new   RemoteCertificateValidationCallback(CheckValidationResult);                }                  /***************************************************************                *   下面设置HttpWebRequest的相关属性                  * ************************************************************/                request =   (HttpWebRequest)WebRequest.Create(url);                request.Method =   "GET";                  //设置代理                WebProxy   proxy = new WebProxy();                  proxy.Address = new Uri(PROXY_URL);                request.Proxy = proxy;                //获取服务器返回                response =   (HttpWebResponse)request.GetResponse();                //获取HTTP返回数据                StreamReader sr = new   StreamReader(response.GetResponseStream(), Encoding.UTF8);                result =   sr.ReadToEnd().Trim();                  sr.Close();            }            catch   (System.Threading.ThreadAbortException e)            {                  Vincent._Log.SaveMessage("HttpService:Thread - caught   ThreadAbortException - resetting.");                  Vincent._Log.SaveMessage("Exception message: " +   e.Message);                  System.Threading.Thread.ResetAbort();            }            catch (WebException e)            {                Vincent._Log.SaveMessage("HttpService"   + e.ToString());                if   (e.Status == WebExceptionStatus.ProtocolError)                {                      Vincent._Log.SaveMessage("HttpService:StatusCode : " +   ((HttpWebResponse)e.Response).StatusCode);                      Vincent._Log.SaveMessage("HttpService:StatusDescription : "   + ((HttpWebResponse)e.Response).StatusDescription);                }                throw new   Exception(e.ToString());            }            catch (Exception e)            {                  Vincent._Log.SaveMessage("HttpService" + e.ToString());                throw new   Exception(e.ToString());              }            finally            {                //关闭连接和流                if (response != null)                {                    response.Close();                }                if (request != null)                {                    request.Abort();                }            }            return result;        }      }}

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