.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：
<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="200px;height:200px;"/> </body> </html>
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productid string 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);
public class WechatPayHelper { private string RequestUrl = "";
private string key = ""; private string appid = "";//应用ID private 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IP private 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-8 private 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XML string 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xml sb.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_url return 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HTTP string 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]?dd?).){3}(2[0-4]d|25[0-5]|[01]?dd?)$"); } /// <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 }
MakeQRCode.aspx.cs 主要生成二维码 要引用 ThoughtWorks.QRCode.dll
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(); } }
微信扫码支付异步通知结果处理
WXNativeNotifyPage.aspx.cs
/// <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; }
微信商户信息配置xml文件
Wechat_Pay_Native.xml
<?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>
至此就可以完成扫码支付了
有图有真相
生成二维码显示
微信扫一扫 结果