C#微信支付(一)—— 基础帮助类

最近做了下微信支付,坑好多了,最终还是做完了,避免下次再走坑,在此总结一下

配置类

public class Config
    {
        //=======【基本信息设置】=====================================
        /* 微信公众号信息配置
        * APPID:绑定支付的APPID(必须配置)
        * MCHID:商户号(必须配置)
        * KEY:商户支付密钥,参考开户邮件设置(必须配置),请妥善保管,避免密钥泄露
        * APPSECRET:公众帐号secert(仅JSAPI支付的时候需要配置),请妥善保管,避免密钥泄露
        */

        public static string AppID
        {
            get { return ConfigurationManager.AppSettings["AppID"]; }
        }

        public static string MchID
        {
            get { return ConfigurationManager.AppSettings["MchID"]; }
        }

        public static string Key
        {
            get { return ConfigurationManager.AppSettings["Key"]; }
        }

        public static string AppSecret
        {
            get { return ConfigurationManager.AppSettings["AppSecret"]; }
        }

        //=======【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)
         * 1.证书文件不能放在web服务器虚拟目录,应放在有访问权限控制的目录中,防止被他人下载;
         * 2.建议将证书文件名改为复杂且不容易猜测的文件
         * 3.商户服务器要做好病毒和木马防护工作,不被非法侵入者窃取证书文件。
        */
        public static string SSlCertPath
        {
            get { return ConfigurationManager.AppSettings["SSlCertPath"]; }
        }

        public static string SSlCertPassword
        {
            get { return ConfigurationManager.AppSettings["SSlCertPassword"]; }
        }

        //=======【支付结果通知url】===================================== 
        /* 支付结果通知回调url,用于商户接收支付结果
        */
        public static string NotifyUrl
        {
            get { return ConfigurationManager.AppSettings["NotifyUrl"]; }
        }

        //=======【商户系统后台机器IP】===================================== 
        /* 此参数可手动配置也可在程序中自动获取
        */
        public static string Ip
        {
            get { return ConfigurationManager.AppSettings["Ip"]; }
        }


        //=======【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 static string ProxyUrl
        {
            get { return ConfigurationManager.AppSettings["ProxyUrl"]; }
        }

        //=======【上报信息配置】===================================
        /* 测速上报等级,0.关闭上报; 1.仅错误时上报; 2.全量上报
        */
        public static int ReportLevel
        {
            get
            {
                int rl = 0;
                int.TryParse(ConfigurationManager.AppSettings["ReportLevel"], out rl);
                return rl;
            }
        }
    }

接口数据处理帮助类

    /// <summary>
    /// 微信支付协议接口数据类,所有的API接口通信都依赖这个数据结构,
    /// 在调用接口之前先填充各个字段的值,然后进行接口通信,
    /// 这样设计的好处是可扩展性强,用户可随意对协议进行更改而不用重新设计数据结构,
    /// 还可以随意组合出不同的协议数据包,不用为每个协议设计一个数据包结构
    /// </summary>
    public class WxPayData
    {
        public  const string SIGN_TYPE_MD5 = "MD5";
        public  const string SIGN_TYPE_HMAC_SHA256 = "HMAC-SHA256";
        public WxPayData()
        {

        }

        //采用排序的Dictionary的好处是方便对数据包进行签名,不用再签名之前再做一次排序
        private SortedDictionary<string, object> m_values = new SortedDictionary<string, object>();

        /**
        * 设置某个字段的值
        * @param key 字段名
         * @param value 字段值
        */
        public void SetValue(string key, object value)
        {
            m_values[key] = value;
        }

        /**
        * 根据字段名获取某个字段的值
        * @param key 字段名
         * @return key对应的字段值
        */
        public object GetValue(string key)
        {
            object o = null;
            m_values.TryGetValue(key, out o);
            return o;
        }

        /**
         * 判断某个字段是否已设置
         * @param key 字段名
         * @return 若字段key已被设置,则返回true,否则返回false
         */
        public bool IsSet(string key)
        {
            object o = null;
            m_values.TryGetValue(key, out o);
            if (null != o)
                return true;
            else
                return false;
        }

        /**
        * @将Dictionary转成xml
        * @return 经转换得到的xml串
        * @throws WxPayException
        **/
        public string ToXml()
        {
            //数据为空时不能转化为xml格式
            if (0 == m_values.Count)
            {
                Log.Error(this.GetType().ToString(), "WxPayData数据为空!");
                throw new WxPayException("WxPayData数据为空!");
            }

            string xml = "<xml>";
            foreach (KeyValuePair<string, object> pair in m_values)
            {
                //字段值不能为null,会影响后续流程
                if (pair.Value == null)
                {
                    Log.Error(this.GetType().ToString(), "WxPayData内部含有值为null的字段!");
                    throw new WxPayException("WxPayData内部含有值为null的字段!");
                }

                if (pair.Value.GetType() == typeof(int))
                {
                    xml += "<" + pair.Key + ">" + pair.Value + "</" + pair.Key + ">";
                }
                else if (pair.Value.GetType() == typeof(string))
                {
                    xml += "<" + pair.Key + ">" + "<![CDATA[" + pair.Value + "]]></" + pair.Key + ">";
                }
                else//除了string和int类型不能含有其他数据类型
                {
                    Log.Error(this.GetType().ToString(), "WxPayData字段数据类型错误!");
                    throw new WxPayException("WxPayData字段数据类型错误!");
                }
            }
            xml += "</xml>";
            return xml;
        }

        /**
        * @将xml转为WxPayData对象并返回对象内部的数据
        * @param string 待转换的xml串
        * @return 经转换得到的Dictionary
        * @throws WxPayException
        */
        public SortedDictionary<string, object> FromXml(string xml)
        {
            if (string.IsNullOrEmpty(xml))
            {
                Log.Error(this.GetType().ToString(), "将空的xml串转换为WxPayData不合法!");
                throw new WxPayException("将空的xml串转换为WxPayData不合法!");
            }


            SafeXmlDocument xmlDoc = new SafeXmlDocument();
            xmlDoc.LoadXml(xml);
            XmlNode xmlNode = xmlDoc.FirstChild;//获取到根节点<xml>
            XmlNodeList nodes = xmlNode.ChildNodes;
            foreach (XmlNode xn in nodes)
            {
                XmlElement xe = (XmlElement)xn;
                m_values[xe.Name] = xe.InnerText;//获取xml的键值对到WxPayData内部的数据中
            }

            try
            {
                //2015-06-29 错误是没有签名
                if(m_values["return_code"] != "SUCCESS")
                {
                    return m_values;
                }
                CheckSign();//验证签名,不通过会抛异常
            }
            catch(WxPayException ex)
            {
                throw new WxPayException(ex.Message);
            }

            return m_values;
        }

        /**
        * @Dictionary格式转化成url参数格式
        * @ return url格式串, 该串不包含sign字段值
        */
        public string ToUrl()
        {
            string buff = "";
            foreach (KeyValuePair<string, object> pair in m_values)
            {
                if (pair.Value == null)
                {
                    Log.Error(this.GetType().ToString(), "WxPayData内部含有值为null的字段!");
                    throw new WxPayException("WxPayData内部含有值为null的字段!");
                }

                if (pair.Key != "sign" && pair.Value.ToString() != "")
                {
                    buff += pair.Key + "=" + pair.Value + "&";
                }
            }
            buff = buff.Trim('&');
            return buff;
        }


        /**
        * @Dictionary格式化成Json
         * @return json串数据
        */
        public string ToJson()
        {
            string jsonStr = JsonMapper.ToJson(m_values);
            return jsonStr;

        }

        /**
        * @values格式化成能在Web页面上显示的结果(因为web页面上不能直接输出xml格式的字符串)
        */
        public string ToPrintStr()
        {
            string str = "";
            foreach (KeyValuePair<string, object> pair in m_values)
            {
                if (pair.Value == null)
                {
                    Log.Error(this.GetType().ToString(), "WxPayData内部含有值为null的字段!");
                    throw new WxPayException("WxPayData内部含有值为null的字段!");
                }


                str += string.Format("{0}={1}\n", pair.Key, pair.Value.ToString());
            }
            str = HttpUtility.HtmlEncode(str);
            Log.Debug(this.GetType().ToString(), "Print in Web Page : " + str);
            return str;
        }


        /**
        * @生成签名,详见签名生成算法
        * @return 签名, sign字段不参加签名
        */
        public string MakeSign(string signType){
            //转url格式
            string str = ToUrl();
            //在string后加入API KEY
            str += "&key=" + WxPayConfig.GetConfig().GetKey();
            if (signType == SIGN_TYPE_MD5)
            {
                var md5 = MD5.Create();
                var bs = md5.ComputeHash(Encoding.UTF8.GetBytes(str));
                var sb = new StringBuilder();
                foreach (byte b in bs)
                {
                    sb.Append(b.ToString("x2"));
                }
                //所有字符转为大写
                return sb.ToString().ToUpper();
            }
            else if(signType==SIGN_TYPE_HMAC_SHA256)
            {
                return CalcHMACSHA256Hash(str, WxPayConfig.GetConfig().GetKey());
            }else{
                throw new WxPayException("sign_type 不合法");
            }
        }

        /**
        * @生成签名,详见签名生成算法
        * @return 签名, sign字段不参加签名 SHA256
        */
        public string MakeSign()
        {
            return MakeSign(SIGN_TYPE_HMAC_SHA256);
        }



        /**
        * 
        * 检测签名是否正确
        * 正确返回true,错误抛异常
        */
        public bool CheckSign(string signType)
        {
            //如果没有设置签名,则跳过检测
            if (!IsSet("sign"))
            {
                Log.Error(this.GetType().ToString(), "WxPayData签名存在但不合法!");
                throw new WxPayException("WxPayData签名存在但不合法!");
            }
            //如果设置了签名但是签名为空,则抛异常
            else if (GetValue("sign") == null || GetValue("sign").ToString() == "")
            {
                Log.Error(this.GetType().ToString(), "WxPayData签名存在但不合法!");
                throw new WxPayException("WxPayData签名存在但不合法!");
            }

            //获取接收到的签名
            string return_sign = GetValue("sign").ToString();

            //在本地计算新的签名
            string cal_sign = MakeSign(signType);

            if (cal_sign == return_sign)
            {
                return true;
            }

            Log.Error(this.GetType().ToString(), "WxPayData签名验证错误!");
            throw new WxPayException("WxPayData签名验证错误!");
        }



        /**
        * 
        * 检测签名是否正确
        * 正确返回true,错误抛异常
        */
        public bool CheckSign()
        {
            return CheckSign(SIGN_TYPE_HMAC_SHA256);
        }

        /**
        * @获取Dictionary
        */
        public SortedDictionary<string, object> GetValues()
        {
            return m_values;
        }


        private  string CalcHMACSHA256Hash(string plaintext, string salt)
        {
            string result = "";
            var enc = Encoding.Default;
            byte[]
            baText2BeHashed = enc.GetBytes(plaintext),
            baSalt = enc.GetBytes(salt);
            System.Security.Cryptography.HMACSHA256 hasher = new HMACSHA256(baSalt);
            byte[] baHashedText = hasher.ComputeHash(baText2BeHashed);
            result = string.Join("", baHashedText.ToList().Select(b => b.ToString("x2")).ToArray());
            return result;
        }




    }

底层通讯类

/// <summary>
    /// http连接基础类,负责底层的http通信
    /// </summary>
    public class HttpService
    {
        private static string USER_AGENT = string.Format("WXPaySDK/{3} ({0}) .net/{1} {2}", Environment.OSVersion, Environment.Version, Config.MchID, typeof(HttpService).Assembly.GetName().Version);

        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            //直接确认,否则打不开    
            return true;
        }

        public static string Post(string xml, string url, 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.UserAgent = USER_AGENT;
                request.Method = "POST";
                request.Timeout = timeout * 1000;

                //设置代理服务器
                if (!string.IsNullOrEmpty(Config.ProxyUrl))
                {
                    WebProxy proxy = new WebProxy();                          //定义一个网关对象
                    proxy.Address = new Uri(Config.ProxyUrl);              //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 + Config.SSlCertPath, Config.SSlCertPassword);
                    request.ClientCertificates.Add(cert);
                    //Log.Debug("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)
            {
                //Log.Error("HttpService", "Thread - caught ThreadAbortException - resetting.");
                //Log.Error("Exception message: {0}", e.Message);
                System.Threading.Thread.ResetAbort();
            }
            catch (WebException e)
            {
                //Log.Error("HttpService", e.ToString());
                if (e.Status == WebExceptionStatus.ProtocolError)
                {
                    //Log.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                    //Log.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                }
                throw new Exception(e.ToString());
            }
            catch (Exception e)
            {
                //Log.Error("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;
        }

        /// <summary>
        /// 处理http GET请求,返回数据
        /// </summary>
        /// <param name="url">请求的url地址</param>
        /// <returns>http GET成功后返回的数据,失败抛WebException异常</returns>
        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.UserAgent = USER_AGENT;
                request.Method = "GET";

                //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)
            {
                //Log.Error("HttpService","Thread - caught ThreadAbortException - resetting.");
                //Log.Error("Exception message: {0}", e.Message);
                System.Threading.Thread.ResetAbort();
            }
            catch (WebException e)
            {
                //Log.Error("HttpService", e.ToString());
                if (e.Status == WebExceptionStatus.ProtocolError)
                {
                    // Log.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                    //Log.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                }
                throw new Exception(e.ToString());
            }
            catch (Exception e)
            {
                //Log.Error("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;
        }
    }

回调处理类,这里加了兼容H5支付的情况,spbill_create_ip H5要求传支付用户的真实IP

/// <summary>
    /// 回调处理基类
    /// 主要负责接收微信支付后台发送过来的数据,对数据进行签名验证
    /// 子类在此类基础上进行派生并重写自己的回调处理过程
    /// </summary>
    public class Notify
    {
        /// <summary>
        /// 接收从微信支付后台发送过来的数据并验证签名
        /// </summary>
        /// <returns>微信支付后台返回的数据</returns>
        public WxPayData GetNotifyData(HttpContext context)
        {
            //接收从微信后台POST过来的数据
            System.IO.Stream s = context.Request.InputStream;
            int count = 0;
            byte[] buffer = new byte[1024];
            StringBuilder builder = new StringBuilder();
            while ((count = s.Read(buffer, 0, 1024)) > 0)
            {
                builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
            }
            s.Flush();
            s.Close();
            s.Dispose();

            //Log.Info(this.GetType().ToString(), "Receive data from WeChat : " + builder.ToString());

            //转换数据格式, 取消签名校验,签名调用方自己调用,兼容支付和退款
            WxPayData data = new WxPayData();
            try
            {
                //FormXML会校验签名
                data.FromXmlNoCheck(builder.ToString());
            }
            catch (Exception ex)
            {
                //若签名错误,则立即返回结果给微信支付后台
                WxPayData res = new WxPayData();
                res.SetValue("return_code", "FAIL");
                res.SetValue("return_msg", ex.Message);
                //Log.Error(this.GetType().ToString(), "Sign check error : " + res.ToXml());
                context.Response.Write(res.ToXml());
                context.Response.End();
            }

            //Log.Info(this.GetType().ToString(), "Check sign success");
            return data;
        }

        //派生类需要重写这个方法,进行不同的回调处理
        public virtual WxPayData ProcessNotify(HttpContext context)
        {
            return null;
        }
    }

随机数

public class RandomGenerator
    {
        readonly RNGCryptoServiceProvider csp;

        public RandomGenerator()
        {
            csp = new RNGCryptoServiceProvider();
        }

        public int Next(int minValue, int maxExclusiveValue)
        {
            if (minValue >= maxExclusiveValue)
                throw new ArgumentOutOfRangeException("minValue must be lower than maxExclusiveValue");

            long diff = (long)maxExclusiveValue - minValue;
            long upperBound = uint.MaxValue / diff * diff;

            uint ui;
            do
            {
                ui = GetRandomUInt();
            } while (ui >= upperBound);
            return (int)(minValue + (ui % diff));
        }

        public uint GetRandomUInt()
        {
            var randomBytes = GenerateRandomBytes(sizeof(uint));
            return BitConverter.ToUInt32(randomBytes, 0);
        }

        private byte[] GenerateRandomBytes(int bytesNumber)
        {
            byte[] buffer = new byte[bytesNumber];
            csp.GetBytes(buffer);
            return buffer;
        }
    }

底层方法,这里跟微信源码有点不一样,多加了H5支付的兼容代码

 public class WxPayApi
    {
        /**
        * 提交被扫支付API
        * 收银员使用扫码设备读取微信用户刷卡授权码以后,二维码或条码信息传送至商户收银台,
        * 由商户收银台或者商户后台调用该接口发起支付。
        * @param WxPayData inputObj 提交给被扫支付API的参数
        * @param int timeOut 超时时间
        * @throws WxPayException
        * @return 成功时返回调用结果,其他抛异常
        */
        public static WxPayData Micropay(WxPayData inputObj, int timeOut = 10)
        {
            string url = "https://api.mch.weixin.qq.com/pay/micropay";
            //检测必填参数
            if (!inputObj.IsSet("body"))
            {
                throw new Exception("提交被扫支付API接口中,缺少必填参数body!");
            }
            else if (!inputObj.IsSet("out_trade_no"))
            {
                throw new Exception("提交被扫支付API接口中,缺少必填参数out_trade_no!");
            }
            else if (!inputObj.IsSet("total_fee"))
            {
                throw new Exception("提交被扫支付API接口中,缺少必填参数total_fee!");
            }
            else if (!inputObj.IsSet("auth_code"))
            {
                throw new Exception("提交被扫支付API接口中,缺少必填参数auth_code!");
            }

            inputObj.SetValue("spbill_create_ip", Config.Ip);//终端ip
            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", Guid.NewGuid().ToString().Replace("-", ""));//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名
            string xml = inputObj.ToXml();

            var start = DateTime.Now;//请求开始时间

            //Log.Debug("WxPayApi", "MicroPay request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);//调用HTTP通信接口以提交数据到API
            //Log.Debug("WxPayApi", "MicroPay response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);//获得接口耗时

            //将xml格式的结果转换为对象以返回
            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        *    
        * 查询订单
        * @param WxPayData inputObj 提交给查询订单API的参数
        * @param int timeOut 超时时间
        * @throws WxPayException
        * @return 成功时返回订单查询结果,其他抛异常
        */
        public static WxPayData OrderQuery(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/pay/orderquery";
            //检测必填参数
            if (!inputObj.IsSet("out_trade_no") && !inputObj.IsSet("transaction_id"))
            {
                throw new Exception("订单查询接口中,out_trade_no、transaction_id至少填一个!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", WxPayApi.GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名


            string xml = inputObj.ToXml();

            var start = DateTime.Now;

            //Log.Debug("WxPayApi", "OrderQuery request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);//调用HTTP通信接口提交数据
            //Log.Debug("WxPayApi", "OrderQuery response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);//获得接口耗时

            //将xml格式的数据转化为对象以返回
            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 撤销订单API接口
        * @param WxPayData inputObj 提交给撤销订单API接口的参数,out_trade_no和transaction_id必填一个
        * @param int timeOut 接口超时时间
        * @throws WxPayException
        * @return 成功时返回API调用结果,其他抛异常
        */
        public static WxPayData Reverse(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/secapi/pay/reverse";
            //检测必填参数
            if (!inputObj.IsSet("out_trade_no") && !inputObj.IsSet("transaction_id"))
            {
                throw new Exception("撤销订单API接口中,参数out_trade_no和transaction_id必须填写一个!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名
            string xml = inputObj.ToXml();

            var start = DateTime.Now;//请求开始时间

            //Log.Debug("WxPayApi", "Reverse request : " + xml);

            string response = HttpService.Post(xml, url, true, timeOut);

            //Log.Debug("WxPayApi", "Reverse response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);

            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 申请退款
        * @param WxPayData inputObj 提交给申请退款API的参数
        * @param int timeOut 超时时间
        * @throws WxPayException
        * @return 成功时返回接口调用结果,其他抛异常
        */
        public static WxPayData Refund(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/secapi/pay/refund";
            //检测必填参数
            if (!inputObj.IsSet("out_trade_no") && !inputObj.IsSet("transaction_id"))
            {
                throw new Exception("退款申请接口中,out_trade_no、transaction_id至少填一个!");
            }
            else if (!inputObj.IsSet("out_refund_no"))
            {
                throw new Exception("退款申请接口中,缺少必填参数out_refund_no!");
            }
            else if (!inputObj.IsSet("total_fee"))
            {
                throw new Exception("退款申请接口中,缺少必填参数total_fee!");
            }
            else if (!inputObj.IsSet("refund_fee"))
            {
                throw new Exception("退款申请接口中,缺少必填参数refund_fee!");
            }
            else if (!inputObj.IsSet("op_user_id"))
            {
                throw new Exception("退款申请接口中,缺少必填参数op_user_id!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", Guid.NewGuid().ToString().Replace("-", ""));//随机字符串

            //异步通知url未设置,则使用配置文件中的url
            if (!inputObj.IsSet("notify_url"))
            {
                inputObj.SetValue("notify_url", Config.NotifyUrl);//异步通知url
            }

            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名

            string xml = inputObj.ToXml();
            var start = DateTime.Now;

            //Log.Debug("WxPayApi", "Refund request : " + xml);
            string response = HttpService.Post(xml, url, true, timeOut);//调用HTTP通信接口提交数据到API
            //Log.Debug("WxPayApi", "Refund response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);//获得接口耗时

            //将xml格式的结果转换为对象以返回
            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 查询退款
        * 提交退款申请后,通过该接口查询退款状态。退款有一定延时,
        * 用零钱支付的退款20分钟内到账,银行卡支付的退款3个工作日后重新查询退款状态。
        * out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个
        * @param WxPayData inputObj 提交给查询退款API的参数
        * @param int timeOut 接口超时时间
        * @throws WxPayException
        * @return 成功时返回,其他抛异常
        */
        public static WxPayData RefundQuery(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/pay/refundquery";
            //检测必填参数
            if (!inputObj.IsSet("out_refund_no") && !inputObj.IsSet("out_trade_no") &&
                !inputObj.IsSet("transaction_id") && !inputObj.IsSet("refund_id"))
            {
                throw new Exception("退款查询接口中,out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名

            string xml = inputObj.ToXml();

            var start = DateTime.Now;//请求开始时间

            //Log.Debug("WxPayApi", "RefundQuery request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);//调用HTTP通信接口以提交数据到API
            //Log.Debug("WxPayApi", "RefundQuery response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);//获得接口耗时

            //将xml格式的结果转换为对象以返回
            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 下载对账单
        * @param WxPayData inputObj 提交给下载对账单API的参数
        * @param int timeOut 接口超时时间
        * @throws WxPayException
        * @return 成功时返回,其他抛异常
        */
        public static WxPayData DownloadBill(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/pay/downloadbill";
            //检测必填参数
            if (!inputObj.IsSet("bill_date"))
            {
                throw new Exception("对账单接口中,缺少必填参数bill_date!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名

            string xml = inputObj.ToXml();

            //Log.Debug("WxPayApi", "DownloadBill request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);//调用HTTP通信接口以提交数据到API
            //Log.Debug("WxPayApi", "DownloadBill result : " + response);

            WxPayData result = new WxPayData();
            //若接口调用失败会返回xml格式的结果
            if (response.Substring(0, 5) == "<xml>")
            {
                result.FromXml(response);
            }
            //接口调用成功则返回非xml格式的数据
            else
                result.SetValue("result", response);

            return result;
        }


        /**
        * 
        * 转换短链接
        * 该接口主要用于扫码原生支付模式一中的二维码链接转成短链接(weixin://wxpay/s/XXXXXX),
        * 减小二维码数据量,提升扫描速度和精确度。
        * @param WxPayData inputObj 提交给转换短连接API的参数
        * @param int timeOut 接口超时时间
        * @throws WxPayException
        * @return 成功时返回,其他抛异常
        */
        public static WxPayData ShortUrl(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/tools/shorturl";
            //检测必填参数
            if (!inputObj.IsSet("long_url"))
            {
                throw new Exception("需要转换的URL,签名用原串,传输需URL encode!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串  
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名
            string xml = inputObj.ToXml();

            var start = DateTime.Now;//请求开始时间

            //Log.Debug("WxPayApi", "ShortUrl request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);
            //Log.Debug("WxPayApi", "ShortUrl response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);

            WxPayData result = new WxPayData();
            result.FromXml(response);
            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 统一下单
        * @param WxPaydata inputObj 提交给统一下单API的参数
        * @param int timeOut 超时时间
        * @throws WxPayException
        * @return 成功时返回,其他抛异常
        */
        public static WxPayData UnifiedOrder(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
            //检测必填参数
            if (!inputObj.IsSet("out_trade_no"))
            {
                throw new Exception("缺少统一支付接口必填参数out_trade_no!");
            }
            else if (!inputObj.IsSet("body"))
            {
                throw new Exception("缺少统一支付接口必填参数body!");
            }
            else if (!inputObj.IsSet("total_fee"))
            {
                throw new Exception("缺少统一支付接口必填参数total_fee!");
            }
            else if (!inputObj.IsSet("trade_type"))
            {
                throw new Exception("缺少统一支付接口必填参数trade_type!");
            }

            //关联参数
            if (inputObj.GetValue("trade_type").ToString() == "JSAPI" && !inputObj.IsSet("openid"))
            {
                throw new Exception("统一支付接口中,缺少必填参数openid!trade_type为JSAPI时,openid为必填参数!");
            }
            if (inputObj.GetValue("trade_type").ToString() == "NATIVE" && !inputObj.IsSet("product_id"))
            {
                throw new Exception("统一支付接口中,缺少必填参数product_id!trade_type为JSAPI时,product_id为必填参数!");
            }

            //异步通知url未设置,则使用配置文件中的url
            if (!inputObj.IsSet("notify_url"))
            {
                inputObj.SetValue("notify_url", Config.NotifyUrl);//异步通知url
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            //若终端IP未设置,则使用配置文件中的终端IP
            if (!inputObj.IsSet("spbill_create_ip"))
            {
                inputObj.SetValue("spbill_create_ip", Config.Ip);//终端ip 
            }
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型

            //签名
            inputObj.SetValue("sign", inputObj.MakeSign());
            string xml = inputObj.ToXml();

            var start = DateTime.Now;

            // Log.Debug("WxPayApi", "UnfiedOrder request : " + xml);
            string response = HttpService.Post(xml, url, false, timeOut);
            //Log.Debug("WxPayApi", "UnfiedOrder response : " + response);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);

            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 关闭订单
        * @param WxPayData inputObj 提交给关闭订单API的参数
        * @param int timeOut 接口超时时间
        * @throws WxPayException
        * @return 成功时返回,其他抛异常
        */
        public static WxPayData CloseOrder(WxPayData inputObj, int timeOut = 6)
        {
            string url = "https://api.mch.weixin.qq.com/pay/closeorder";
            //检测必填参数
            if (!inputObj.IsSet("out_trade_no"))
            {
                throw new Exception("关闭订单接口中,out_trade_no必填!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串      
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名
            string xml = inputObj.ToXml();

            var start = DateTime.Now;//请求开始时间

            string response = HttpService.Post(xml, url, false, timeOut);

            var end = DateTime.Now;
            int timeCost = (int)((end - start).TotalMilliseconds);

            WxPayData result = new WxPayData();
            result.FromXml(response);

            ReportCostTime(url, timeCost, result);//测速上报

            return result;
        }


        /**
        * 
        * 测速上报
        * @param string interface_url 接口URL
        * @param int timeCost 接口耗时
        * @param WxPayData inputObj参数数组
        */
        private static void ReportCostTime(string interface_url, int timeCost, WxPayData inputObj)
        {
            //如果不需要进行上报
            if (Config.ReportLevel == 0)
            {
                return;
            }

            ////如果仅失败上报
            if (Config.ReportLevel == 1 && inputObj.IsSet("return_code") && inputObj.GetValue("return_code").ToString() == "SUCCESS" &&
             inputObj.IsSet("result_code") && inputObj.GetValue("result_code").ToString() == "SUCCESS")
            {
                return;
            }

            //上报逻辑
            WxPayData data = new WxPayData();
            data.SetValue("interface_url", interface_url);
            data.SetValue("execute_time_", timeCost);
            //返回状态码
            if (inputObj.IsSet("return_code"))
            {
                data.SetValue("return_code", inputObj.GetValue("return_code"));
            }
            //返回信息
            if (inputObj.IsSet("return_msg"))
            {
                data.SetValue("return_msg", inputObj.GetValue("return_msg"));
            }
            //业务结果
            if (inputObj.IsSet("result_code"))
            {
                data.SetValue("result_code", inputObj.GetValue("result_code"));
            }
            //错误代码
            if (inputObj.IsSet("err_code"))
            {
                data.SetValue("err_code", inputObj.GetValue("err_code"));
            }
            //错误代码描述
            if (inputObj.IsSet("err_code_des"))
            {
                data.SetValue("err_code_des", inputObj.GetValue("err_code_des"));
            }
            //商户订单号
            if (inputObj.IsSet("out_trade_no"))
            {
                data.SetValue("out_trade_no", inputObj.GetValue("out_trade_no"));
            }
            //设备号
            if (inputObj.IsSet("device_info"))
            {
                data.SetValue("device_info", inputObj.GetValue("device_info"));
            }

            try
            {
                Report(data);
            }
            catch (Exception)
            {
                //不做任何处理
            }
        }


        /**
        * 
        * 测速上报接口实现
        * @param WxPayData inputObj 提交给测速上报接口的参数
        * @param int timeOut 测速上报接口超时时间
        * @throws WxPayException
        * @return 成功时返回测速上报接口返回的结果,其他抛异常
        */
        public static WxPayData Report(WxPayData inputObj, int timeOut = 1)
        {
            string url = "https://api.mch.weixin.qq.com/payitil/report";
            //检测必填参数
            if (!inputObj.IsSet("interface_url"))
            {
                throw new Exception("接口URL,缺少必填参数interface_url!");
            }
            if (!inputObj.IsSet("return_code"))
            {
                throw new Exception("返回状态码,缺少必填参数return_code!");
            }
            if (!inputObj.IsSet("result_code"))
            {
                throw new Exception("业务结果,缺少必填参数result_code!");
            }
            if (!inputObj.IsSet("user_ip"))
            {
                throw new Exception("访问接口IP,缺少必填参数user_ip!");
            }
            if (!inputObj.IsSet("execute_time_"))
            {
                throw new Exception("接口耗时,缺少必填参数execute_time_!");
            }

            inputObj.SetValue("appid", Config.AppID);//公众账号ID
            inputObj.SetValue("mch_id", Config.MchID);//商户号
            inputObj.SetValue("user_ip", Config.Ip);//终端ip
            inputObj.SetValue("time", DateTime.Now.ToString("yyyyMMddHHmmss"));//商户上报时间  
            inputObj.SetValue("nonce_str", GenerateNonceStr());//随机字符串
            inputObj.SetValue("sign_type", WxPayData.SIGN_TYPE_HMAC_SHA256);//签名类型
            inputObj.SetValue("sign", inputObj.MakeSign());//签名
            string xml = inputObj.ToXml();

            //Log.Info("WxPayApi", "Report request : " + xml);

            string response = HttpService.Post(xml, url, false, timeOut);

            //Log.Info("WxPayApi", "Report response : " + response);

            WxPayData result = new WxPayData();
            result.FromXml(response);
            return result;
        }

        /**
        * 根据当前系统时间加随机序列来生成订单号
         * @return 订单号
        */
        //public static string GenerateOutTradeNo()
        //{
        //    var ran = new Random();
        //    return string.Format("{0}{1}{2}", Config.MchID, DateTime.Now.ToString("yyyyMMddHHmmss"), ran.Next(999));
        //}

        /**
        * 生成时间戳,标准北京时间,时区为东八区,自1970年1月1日 0点0分0秒以来的秒数
         * @return 时间戳
        */
        public static string GenerateTimeStamp()
        {
            TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalSeconds).ToString();
        }

        /**
        * 生成随机串,随机串包含字母或数字
        * @return 随机串
        */
        public static string GenerateNonceStr()
        {
            RandomGenerator randomGenerator = new RandomGenerator();
            return randomGenerator.GetRandomUInt().ToString();
        }
    }

转JSON那,微信用的是LitJson,项目实际用的是Newtonsoft.Json,因为多封装了一层,所以WxPayData就用了微信源码,具体根据项目情况再改一改就好了,基础帮助没什么坑,按照实际情况改下就好了

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转载自blog.csdn.net/qwt7896541230/article/details/82690365