.NET微信扫码支付模式二API接口开发测试

主要实现微信扫码支付，官网的SDKdemo 就不要使用一直不能调试通过的，还是自己按照API接口文档一步一步来实现，吐槽下微信一点责任感都木有，能不能demo搞个正常的吗，不要坑惨了一大群码农们有点社会责任感吧还是多学学你的Alibaba 直接上干货

具体文档接口都直接参考文档说明干

具体代码一步一步呈上

Index.aspx 显示二维码页面：

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<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server"><meta http-equiv="content-type" content="text/html;image/gif;charset=utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1" /> <title>微信支付样例-扫码支付</title>
</head>
<body><div style="margin-left: 10px;color:#00CD00;font-size:30px;font-weight: bolder;">扫码支付模式二</div><br/><asp:Image ID="Image2" runat="server" style="width:200px;height:200px;"/></body></html>

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protected void Page_Load(object sender, EventArgs e){//支付金额string PayPrice = Request.GetString("payprice").ToString("filtersql");//支付单号string Payorder = Request.GetString("payorder").ToString("filtersql");//公众号jsapi支付 H5支付传参数string Openid = Request.GetString("openid").ToString("filtersql");//扫码支付 模式二string productId = Request.GetString("productId").ToString("filtersql");WechatPayHelper wxpay = new WechatPayHelper();int total_fee = (Convert.ToInt32(decimal.Parse("0.01") * 100)); //扫码支付模式二 Native   Pay  trade_type=NATIVE时（即扫码支付），此参数必传。此参数为二维码中包含的商品ID，商户自行定义主要参数依次是 订单号 金额 openid 公众号  产品productidstring return_response = wxpay.GetUnifiedOrderResultNative("2017100882002", total_fee, "财政专费", "oC88888JeOjjkgvlWf6p999Jgu4", "456888888");//将url生成二维码图片Image2.ImageUrl = "http://localhost:1200/NotivePayAPI/MakeQRCode.aspx?data=" + HttpUtility.UrlEncode(return_response);

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public class WechatPayHelper
{private string RequestUrl = "";private string key = "";private string appid = "";//应用IDprivate string mch_id = "";//商户号private string nonce_str = "";//随机字符串private string sign = "";//签名// private string body = "";//商品描述// private string out_trade_no = "";//商户订单号private string spbill_create_ip = "";//终端IPprivate string notify_url = "";//通知地址private string trade_type = "";//交易类型private string pay_url = "";//字符编码格式 目前支持 utf-8private string input_charset = "utf-8";//签名方式private string sign_type = "MD5";public WechatPayHelper(){HttpContext Context = System.Web.HttpContext.Current;DataTable dt = null;//native 扫码支付配置  读取配置文件XMLstring strXML = "Wechat_Pay_Native.xml";//object objValue = Common.DataCache.GetCache(strXML);if (objValue == null){dt = GetConfigXml("//Config//PayConfig/" + strXML);Common.DataCache.SetCache(strXML, dt);}else{dt = (DataTable)objValue;}if (dt != null){appid = dt.Rows[0]["appid"].ToString();mch_id = dt.Rows[0]["mch_id"].ToString();notify_url = dt.Rows[0]["notify_url"].ToString();pay_url = dt.Rows[0]["pay_url"].ToString();spbill_create_ip = GetUserIp();nonce_str=StrRodamNo(16);trade_type = dt.Rows[0]["trade_type"].ToString();key = dt.Rows[0]["key"].ToString();}}/// <summary>/// 生成直接支付url 调用统一下单，获得下单结果 扫码支付模式二   支付url有效期为2小时,/// </summary>/// <param name="out_trade_no"></param>/// <param name="total_fee"></param>/// <param name="body"></param>/// <returns></returns>public string GetUnifiedOrderResultNative(string out_trade_no, int total_fee, string body, string openid, string productId){//请求业务参数详细StringBuilder sb = new StringBuilder();sb.AppendFormat("<xml><appid>{0}</appid><mch_id>{1}</mch_id> <body>{2}</body><nonce_str>{3}</nonce_str>", appid, mch_id, body, nonce_str);sb.AppendFormat("<out_trade_no>{0}</out_trade_no><total_fee>{1}</total_fee> <spbill_create_ip>{2}</spbill_create_ip><trade_type>{3}</trade_type>", out_trade_no, total_fee.ToString(), spbill_create_ip, trade_type);sb.AppendFormat("<notify_url>{0}</notify_url>", notify_url);sb.AppendFormat("<openid>{0}</openid>", openid);sb.AppendFormat("<product_id>{0}</product_id>", productId);//把请求参数打包成数组Dictionary<string, string> softdic = new Dictionary<string, string>();softdic.Add("appid", appid);softdic.Add("mch_id", mch_id);softdic.Add("nonce_str", nonce_str);softdic.Add("body", body);softdic.Add("out_trade_no", out_trade_no);softdic.Add("total_fee", total_fee.ToString());softdic.Add("spbill_create_ip", spbill_create_ip);softdic.Add("trade_type", trade_type);softdic.Add("notify_url", notify_url);softdic.Add("openid", openid);softdic.Add("product_id", productId);//请求参数体string strRequest = "";//加密签名string strSign = MakeSignData(softdic, ref strRequest);strRequest += "&sign=" + strSign;//打包xmlsb.AppendFormat("<sign>{0}</sign></xml>", strSign);//发送请求string strResponse = RequestWechatpay(sb.ToString());//URLDECODE返回的信息Encoding code = Encoding.GetEncoding(input_charset);strResponse = HttpUtility.UrlDecode(strResponse, code);string ResponseURL = ReadXmlNode(strResponse);//获得统一下单接口返回的二维码链接code_urlreturn ResponseURL;}/// <summary>/// 签名原始串/// </summary>/// <param name="dicParm">所有非空参数</param>/// <param name="strQueryString">请求串</param>/// <returns>签名串</returns>public string MakeSignData(Dictionary<string, string> dicParm, ref string strQueryString){   //先排序Dictionary<string, string> dicSort = dicParm.OrderBy(o => o.Key).ToDictionary(o => o.Key, p => p.Value);StringBuilder sb = new StringBuilder();//再转换成URL字符串foreach (KeyValuePair<string, string> kvParm in dicSort){if (null != kvParm.Value && "".CompareTo(kvParm.Value) != 0&& "sign".CompareTo(kvParm.Key) != 0 && "key".CompareTo(kvParm.Key) != 0 && "sign_type".CompareTo(kvParm.Key) != 0){if (sb.Length > 0){sb.Append("&");strQueryString += "&";}sb.Append(kvParm.Key + "=" + HttpUtility.UrlDecode(kvParm.Value));strQueryString += kvParm.Key + "=" + HttpUtility.UrlEncode(kvParm.Value);}}//再和key拼装成字符串sb.Append("&key=" + key);//再进行MD5加密转成大写return MD5Create(sb.ToString(), input_charset).ToUpper();}public static string MD5Create(string str, string charset){string retStr;MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();//创建md5对象byte[] inputBye;byte[] outputBye;//使用GB2312编码方式把字符串转化为字节数组．try{inputBye = Encoding.GetEncoding(charset).GetBytes(str);}catch (Exception ex){inputBye = Encoding.GetEncoding("GB2312").GetBytes(str);}outputBye = m5.ComputeHash(inputBye);retStr = System.BitConverter.ToString(outputBye);retStr = retStr.Replace("-", "");return retStr;}/// <summary>///把请求参数信息打包发送请求微信支付地址/// </summary>/// <param name="strRequestData">请求参数字符串（QueryString）</param>/// <returns></returns>private string RequestWechatpay(string strRequestData){Encoding code = Encoding.GetEncoding(input_charset);//把数组转换成流中所需字节数组类型byte[] bytesRequestData = code.GetBytes(strRequestData);//请求远程HTTPstring strResult = "";try{//设置HttpWebRequest基本信息HttpWebRequest myReq = (HttpWebRequest)HttpWebRequest.Create(pay_url);myReq.Method = "post";myReq.ContentType = "text/xml";//填充POST数据myReq.ContentLength = bytesRequestData.Length;Stream requestStream = myReq.GetRequestStream();requestStream.Write(bytesRequestData, 0, bytesRequestData.Length);requestStream.Close();//发送POST数据请求服务器HttpWebResponse HttpWResp = (HttpWebResponse)myReq.GetResponse();Stream myStream = HttpWResp.GetResponseStream();//获取服务器返回信息StreamReader reader = new StreamReader(myStream, code);StringBuilder responseData = new StringBuilder();String line;while ((line = reader.ReadLine()) != null){responseData.Append(line);}//释放myStream.Close();strResult = responseData.ToString();}catch (Exception exp){strResult = "报错：" + exp.Message;}return strResult;}/// <summary>/// 获得客户端的IP/// </summary>/// <returns>当前页面客户端的IP</returns>public static string GetUserIp(){string userHostAddress = HttpContext.Current.Request.UserHostAddress;if (string.IsNullOrEmpty(userHostAddress)){userHostAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];}//最后判断获取是否成功，并检查IP地址的格式（检查其格式非常重要）if (!string.IsNullOrEmpty(userHostAddress) && IsIP(userHostAddress)){return userHostAddress;}return "127.0.0.1";}/// <summary>/// 检查IP地址格式/// </summary>/// <param name="ip"></param>/// <returns></returns>public static bool IsIP(string ip){return System.Text.RegularExpressions.Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");}/// <summary>/// 生成随机字母与数字/// </summary>/// <param name="IntStr">生成长度</param>/// <returns></returns>public static string StrRodamNo(int Length){return StrRodam(Length, false);}/// <summary>/// 生成随机字母与数字/// </summary>/// <param name="Length">生成长度</param>/// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>/// <returns></returns>public static string StrRodam(int Length, bool Sleep){if (Sleep)System.Threading.Thread.Sleep(3);char[] Pattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };string result = "";int n = Pattern.Length;System.Random random = new Random(~unchecked((int)DateTime.Now.Ticks));for (int i = 0; i < Length; i++){int rnd = random.Next(0, n);result += Pattern[rnd];}return result;}#region 读取xml中的指定节点的值/// <summary>  /// 读取xml中的指定节点的值/// </summary>  private string ReadXmlNode(string filename){string result = "调用微信服务异常";XmlDocument xmlDoc = new XmlDocument();try{xmlDoc.LoadXml(filename);XmlNode root = xmlDoc.SelectSingleNode("xml");       if (root != null)result = (root.SelectSingleNode("code_url")).InnerText;}catch (Exception e){Common.Utils.WriteLogFile("ReadXmlNode：" + e.Message,"");}return result;}#endregion
}

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MakeQRCode.aspx.cs 主要生成二维码要引用 ThoughtWorks.QRCode.dll

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protected void Page_Load(object sender, EventArgs e){if (!string.IsNullOrEmpty(Request.QueryString["data"])){string str = Request.QueryString["data"];//初始化二维码生成工具QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;qrCodeEncoder.QRCodeVersion = 0;qrCodeEncoder.QRCodeScale = 4;//将字符串生成二维码图片Bitmap image = qrCodeEncoder.Encode(str, Encoding.Default);//保存为PNG到内存流  MemoryStream ms = new MemoryStream();image.Save(ms, ImageFormat.Png);//输出二维码图片Response.BinaryWrite(ms.GetBuffer());Response.End();}}

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微信扫码支付异步通知结果处理

WXNativeNotifyPage.aspx.cs

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/// <summary>/// 微信扫码支付异步通知结果处理 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/// </summary>/// <param name="sender"></param>/// <param name="e"></param>protected void Page_Load(object sender, EventArgs e){/////微信的API写法/////接收从微信后台POST过来的数据//System.IO.Stream s = Page.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();//SZRPP.Common.Utils.WriteLogFile("接收post来的数据", "Receive data from WeChat : " + builder.ToString());//Dictionary<string, string> dicParam = GetInfoFromXml(builder.ToString());////////接收从微信后台POST过来的数据StreamReader reader = new StreamReader(Request.InputStream);String xmlData = reader.ReadToEnd();Utils.WriteLog("接收post来的微信异步回调：" + xmlData, "微信异步回调");//序列化xml //转换数据格式并验证签名Dictionary<string, string> dicParam = GetInfoFromXml(xmlData);string data = "";try{//当收到通知进行处理时，首先检查对应业务数据的状态，判断该通知是否已经处理过，如果没有处理过再进行处理，如果处理过直接返回结果成功。在对业务数据进行状态检查和处理之前，要采用数据锁进行并发控制，以避免函数重入造成的数据混乱。if (dicParam.ContainsKey("return_code") && dicParam["return_code"] == "SUCCESS"){WechatPayHelper wcHelper = new WechatPayHelper();string strRequestData = "";//对返回的参数信息进行签名string strSign = wcHelper.MakeSignData(dicParam, ref strRequestData);//判断返回签名是否正确if (strSign == dicParam["sign"]){//判断业务结果if ("SUCCESS" == dicParam["result_code"]){//检查openid和product_id是否返回if (string.IsNullOrEmpty(dicParam["openid"]) || string.IsNullOrEmpty(dicParam["product_id"])){data = "<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[产品ID不存在回调数据异常]]></return_msg></xml>";Response.Write(data);}//判断业务是否处理过  应该有通知日志表  先暂通过缴费表做判断string out_trade_no = dicParam["out_trade_no"];//订单编号if (out_trade_no != null){  //自己的订单逻辑处理了 比较金额是否一致OrderPay pay = payBll.Query(out_trade_no,"");if (pay!= null){//商户系统对于支付结果通知的内容一定要做签名验证,并校验返回的订单金额是否与商户侧的订单金额一致，防止数据泄漏导致出现“假通知”，造成资金损失。if (pay.PayPrice.Equals(decimal.Parse(dicParam["total_fee"])/100)){data = "<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[金额不一致回调数据异常]]></return_msg></xml>";Response.Write(data);}if (pay.PayStatus == 1){//已经支付 视为处理过 直接返回data = "<xml><return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg></xml>";Response.Write(data);}else{  //收到确认后，更新订单的状态//修改支付状态if (payBll.UpdatePayStatus(out_trade_no, "1",1) > 0){data = "<xml><return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg></xml>";Response.Write(data);}}}else{data = "<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[系统调用超时]]></return_msg></xml>";Response.Write(data);}}}else{//错误信息string error = dicParam["err_code"] + ":" + dicParam["err_code_des"];data = "<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[系统调用超时]]></return_msg></xml>";Response.Write(data);}}else{data="<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[系统超时]]></return_msg></xml>";Response.Write(data);}}}catch (Exception ex){Utils.WriteLog("微信异步回调异常：" + ex.Message, "异常日志");data = "<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[系统调用超时]]></return_msg></xml>";Response.Write(data);}}/// <summary>/// 把XML数据转换为Sorted<string, string>集合/// </summary>/// <param name="strxml"></param>/// <returns></returns>public Dictionary<string, string> GetInfoFromXml(string xmlstring){Dictionary<string, string> sParams = new Dictionary<string, string>();try{XmlDocument doc = new XmlDocument();doc.LoadXml(xmlstring);XmlElement root = doc.DocumentElement;int len = root.ChildNodes.Count;for (int i = 0; i < len; i++){string name = root.ChildNodes[i].Name;if (!sParams.ContainsKey(name)){sParams.Add(name.Trim(), root.ChildNodes[i].InnerText.Trim());}}}catch (Exception ex){}return sParams;}

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微信商户信息配置xml文件

Wechat_Pay_Native.xml

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<?xml version="1.0" encoding="utf-8" ?>
<data><!--接收微信支付异步通知回调地址，通知url必须为直接可访问的url，不能携带参数--><notify_url>http://8.20.7.8:300/PayNotifyPage/PayNotify/WXNativeNotifyPage.aspx</notify_url><pay_url>https://api.mch.weixin.qq.com/pay/unifiedorder</pay_url><!--微信开放平台审核通过的应用APPID--><appid>wxf88888888888</appid><!--微信支付分配的商户号--><mch_id>14666666662</mch_id><key>16gfhhg5655jjh55ff8ff88gd</key><subject>财政专费</subject><trade_type>NATIVE</trade_type>
</data>

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至此就可以完成扫码支付了

有图有真相

生成二维码显示