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							using System;
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							using System.Collections.Generic;
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							using System.Web;
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							using System.Threading;
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							namespace WxPayAPI
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							{
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							    public class MicroPay
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							    {
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							        /**
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							        * 刷卡支付完整业务流程逻辑
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							        * @param body 商品描述
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							        * @param total_fee 总金额
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							        * @param auth_code 支付授权码
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							        * @throws WxPayException
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							        * @return 刷卡支付结果
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							        */
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							        public static string Run(string body, string total_fee, string auth_code)
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							        {
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							            Log.Info("MicroPay", "Micropay is processing...");
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							            WxPayData data = new WxPayData();
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							            data.SetValue("auth_code", auth_code);//授权码
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							            data.SetValue("body", body);//商品描述
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							            data.SetValue("total_fee", int.Parse(total_fee));//总金额
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							            data.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());//产生随机的商户订单号
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							            WxPayData result = WxPayApi.Micropay(data, 10); //提交被扫支付,接收返回结果
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									    //如果提交被扫支付接口调用失败,则抛异常
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							            if (!result.IsSet("return_code") || result.GetValue("return_code").ToString() == "FAIL")
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									    {
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							                string returnMsg = result.IsSet("return_msg") ? result.GetValue("return_msg").ToString() : "";
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							                Log.Error("MicroPay", "Micropay API interface call failure, result : " + result.ToXml());
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							                throw new WxPayException("Micropay API interface call failure, return_msg : " + returnMsg);
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									    }
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									    //签名验证
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							            result.CheckSign();
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							            Log.Debug("MicroPay", "Micropay response check sign success");
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							            //刷卡支付直接成功
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							            if(result.GetValue("return_code").ToString() == "SUCCESS" &&
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									        result.GetValue("result_code").ToString() == "SUCCESS")
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							            {
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							                Log.Debug("MicroPay", "Micropay business success, result : " + result.ToXml());
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							                return result.ToPrintStr();
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							            }
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							            /******************************************************************
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							             * 剩下的都是接口调用成功,业务失败的情况
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							             * ****************************************************************/
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									    //1)业务结果明确失败
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									    if(result.GetValue("err_code").ToString() != "USERPAYING" && 
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									    result.GetValue("err_code").ToString() != "SYSTEMERROR")
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									    {
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							                Log.Error("MicroPay", "micropay API interface call success, business failure, result : " + result.ToXml());
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							                return result.ToPrintStr();
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									    }
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							            //2)不能确定是否失败,需查单
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							            //用商户订单号去查单
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							            string out_trade_no = data.GetValue("out_trade_no").ToString();
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									    //确认支付是否成功,每隔一段时间查询一次订单,共查询10次
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									    int queryTimes = 10;//查询次数计数器
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									    while(queryTimes-- > 0)
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									    {
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										    int succResult = 0;//查询结果
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										    WxPayData queryResult = Query(out_trade_no, out succResult);
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										    //如果需要继续查询,则等待2s后继续
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										    if(succResult == 2)
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							                {
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											    Thread.Sleep(2000);
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											    continue;
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										    }
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							                //查询成功,返回订单查询接口返回的数据
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							                else if(succResult == 1)
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							                {
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							                    Log.Debug("MicroPay", "Mircopay success, return order query result : " + queryResult.ToXml());
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							                    return queryResult.ToPrintStr();
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										    }
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							                //订单交易失败,直接返回刷卡支付接口返回的结果,失败原因会在err_code中描述
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							                else
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							                {
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							                    Log.Error("MicroPay", "Micropay failure, return micropay result : " + result.ToXml());
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							                    return result.ToPrintStr();
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										    }
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									    }
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							            //确认失败,则撤销订单
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							            Log.Error("MicroPay", "Micropay failure, Reverse order is processing...");
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									    if(!Cancel(out_trade_no))
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									    {
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							                Log.Error("MicroPay", "Reverse order failure");
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							                throw new WxPayException("Reverse order failure!");
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									    }
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							            return result.ToPrintStr();
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							        }
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							        /**
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								    * 
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								    * 查询订单情况
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								    * @param string out_trade_no  商户订单号
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								    * @param int succCode         查询订单结果:0表示订单不成功,1表示订单成功,2表示继续查询
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								    * @return 订单查询接口返回的数据,参见协议接口
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								    */
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							        public static WxPayData Query(string out_trade_no, out int succCode)
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								    {
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									    WxPayData queryOrderInput = new WxPayData();
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									    queryOrderInput.SetValue("out_trade_no",out_trade_no);
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									    WxPayData result = WxPayApi.OrderQuery(queryOrderInput);
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									    if(result.GetValue("return_code").ToString() == "SUCCESS" 
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										    && result.GetValue("result_code").ToString() == "SUCCESS")
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									    {
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										    //支付成功
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										    if(result.GetValue("trade_state").ToString() == "SUCCESS")
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							                {
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											    succCode = 1;
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										   	    return result;
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										    }
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										    //用户支付中,需要继续查询
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										    else if(result.GetValue("trade_state").ToString() == "USERPAYING")
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							                {
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											    succCode = 2;
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											    return result;
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										    }
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									    }
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									    //如果返回错误码为“此交易订单号不存在”则直接认定失败
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									    if(result.GetValue("err_code").ToString() == "ORDERNOTEXIST")
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									    {
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										    succCode = 0;
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									    } 
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							            else
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							            {
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										    //如果是系统错误,则后续继续
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										    succCode = 2;
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									    }
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									    return result;
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								    }
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								    /**
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								    * 
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								    * 撤销订单,如果失败会重复调用10次
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								    * @param string out_trade_no 商户订单号
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								    * @param depth 调用次数,这里用递归深度表示
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							        * @return false表示撤销失败,true表示撤销成功
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								    */
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								    public static bool Cancel(string out_trade_no, int depth = 0)
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								    {
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									    if(depth > 10)
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							            {
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										    return false;
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									    }
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									    WxPayData reverseInput = new WxPayData();
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									    reverseInput.SetValue("out_trade_no",out_trade_no);
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									    WxPayData result = WxPayApi.Reverse(reverseInput);
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									    //接口调用失败
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									    if(result.GetValue("return_code").ToString() != "SUCCESS")
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							            {
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										    return false;
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									    }
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									    //如果结果为success且不需要重新调用撤销,则表示撤销成功
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									    if(result.GetValue("result_code").ToString() != "SUCCESS" && result.GetValue("recall").ToString() == "N")
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							            {
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										    return true;
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									    } 
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							            else if(result.GetValue("recall").ToString() == "Y") 
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							            {
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										    return Cancel(out_trade_no, ++depth);
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									    }
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									    return false;
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								    }
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							    }
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							} |