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View层代码:

NativePay.cshtml:

@{
ViewBag.Title = "微信扫码支付";
}
<style>
.container .row{ margin-left: 0;margin-right: 0;}
.page-header .header img{width:40px;}
.page-header .row div,.payinfo{padding-left: 0;}
.row .paymoney{text-align: right;}
.payinfo img{height: 30px;}
.payinfo span{vertical-align: middle;color: gray}
.paymoney span.warning{color:orangered;margin: 0 5px;}
.qrcode {width: 200px;height: 200px; display: block;margin-top: 20px;margin-bottom: 20px;}
.payqr img{width: 200px;}
</style>
<div class="container">
<div class="row">
<div class="page">
<div class="page-header">
<div class="row header">
<h2><img src="~/WxPayAPI/imgs/logo.png" /> 收银台</h2>
</div>
<div class="row">
<div class="col-md-8">
<p>订单编号:@ViewBag.OrderNumber</p>
</div>
<div class="col-md-4 paymoney">
<h2>应付金额:@ViewBag.OrderPrice</h2>
</div>
</div>
</div>
<div class="row">
<div class="col-md-8 payinfo">
<img src="~/WxPayAPI/imgs/WePayLogo.png" />
<img src="~/WxPayAPI/imgs/按钮标签.png" />
<span>亿万用户的选择,更快更安全</span>
</div>
<div class="col-md-4 paymoney">支付<span class="warning">@ViewBag.OrderPrice</span>元</div>
</div>
<div class="row payqr">
<img src="@ViewBag.QRCode" class="qrcode" />
<img src="~/WxPayAPI/imgs/说明文字.png" />
</div>
<input type="hidden" id="trade" value="@ViewBag.OrderNumber"/>
</div>
</div>
</div> <script>
$(function() {
var trade = $("#trade").val();
setInterval(function() {
$.post("/WeChatPay/WXNativeNotifyPage", { tradeno: trade }, function (data) {
if (data == 1) {
location.href = "/WeChatPay/PaySuccess?tradeno=" + trade;
} if (data == 2) {
location.href = "/WeChatPay/PaySuccess?tradeno=" + trade;
}
});
}, 1000); }); </script>

通知页面 可以忽略:

WXNativeNotifyPage.cshtml

@{
ViewBag.Title = "WXNativeNotifyPage";
Layout = "~/Views/Shared/_Layout.cshtml";
} <h2>WXNativeNotifyPage</h2>

PaySuccess.cshtml

<@using WeChatPayMvc.Models
@model PayOrder @{
ViewBag.Title = "PaySuccess";
}
<style>
.container .row{ margin-left: 0;margin-right: 0;}
</style>
<div class="container">
<div class="row">
<div class="page">
<div class="page-header">
<div class="row header">
@if (Model.PayStatus ==1)
{
<h2>支付成功!</h2>
}
else
{
<h2>支付失败!</h2>
}
</div>
<div>订单号:@Model.OrderNumber</div>
</div>
</div>
</div>
</div>

Controller 控制器代码:

WeChatPayController

using Business;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Xml;
using ThoughtWorks.QRCode.Codec;
using WeChatPayMvc.Models;
using System.Text.RegularExpressions; namespace WeChatPayMvc.Controllers
{
public class WeChatPayController : Controller
{
//
// GET: /WeChatPay/ public ActionResult Index()
{
return RedirectToAction("NativePay");
} /// <summary>
/// 扫码支付下单入口
/// </summary>
/// <returns></returns>
public ActionResult NativePay()
{
var order = new PayOrder();
//order.OrderNumber = GenerateOutTradeNo();
//order.OrderPrice = (Convert.ToInt32(decimal.Parse("0.01") * 100)).ToString();
ViewBag.OrderNumber = GenerateOutTradeNo();
ViewBag.OrderPrice = decimal.Parse("0.01").ToString();
int total_fee = (Convert.ToInt32(decimal.Parse(ViewBag.OrderPrice) * ));
string productid = ""; WechatPayHelper wxpay = new WechatPayHelper();
//主要参数依次是 订单号 金额 openid 公众号 产品productid
string return_response = wxpay.GetUnifiedOrderResultNative(ViewBag.OrderNumber, total_fee, "财政专费", "oC88888df99jdfdWf6p999Jgu4", productid);
//将url生成二维码图片 ViewBag.QRCode = "http://localhost:38773/WeChatPay/MakeQRCode?data=" + HttpUtility.UrlEncode(return_response);
return View();
}
/// <summary>
/// 二维码生成工具
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public FileResult MakeQRCode(string data)
{
if (string.IsNullOrEmpty(data))
throw new ArgumentException("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 = ;
qrCodeEncoder.QRCodeScale = ; //将字符串生成二维码图片
Bitmap image = qrCodeEncoder.Encode(data, Encoding.Default); //保存为PNG到内存流
MemoryStream ms = new MemoryStream();
image.Save(ms, ImageFormat.Jpeg); return File(ms.ToArray(), "image/jpeg");
} /**
* 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}", DateTime.Now.ToString("yyyyMMddHHmmss"), ran.Next());
} public ActionResult PaySuccess(string tradeno)
{ var order = new PayOrder() { OrderNumber = tradeno };
return View(order);
} /// <summary>
/// //接收从微信后台POST过来的数据 通知地址信息
/// </summary>
public ActionResult WXNativeNotifyPage()
{
//接收从微信后台POST过来的数据
//Stream s = 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(); ////转换数据格式并验证签名
//WxPayData data = new WxPayData();
//try
//{
// data.FromXml(builder.ToString());
//}
StreamReader reader = new StreamReader(Request.InputStream);
String xmlData = reader.ReadToEnd();
WriteLogFile("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)
{
//查询订单
PayOrderBLL payoderBll = new PayOrderBLL();
PayOrder pay = payoderBll.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.OrderPrice.Equals(decimal.Parse(dicParam["total_fee"]) / ))
{
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 == )
{
//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 (payoderBll.UpdatePayStatus(out_trade_no, "", ) > )
{ 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[系统调用超时]]></return_msg></xml>";
Response.Write(data);
}
} }
catch (Exception ex)
{
WriteLogFile("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);
}
return View(); } /// <summary>
/// 把XML数据转换为SortedDictionary<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 = ; 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;
} }
}

实用类WechatPayHelper代码:

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Xml; namespace WeChatPayMvc
{
public class WechatPayHelper
{
private string RequestUrl = "";//接口调用地址
//交易安全检验码,由数字和字母组成的32位字符串
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,选择项:0001(RSA)、MD5
private string sign_type = "MD5";
public WechatPayHelper()
{
HttpContext Context = System.Web.HttpContext.Current;
DataTable dt = null; //native 扫码支付配置
string strXML = "Wechat_Pay_Native.xml";
//////////////////////////////////////////////////
object objValue = GetCache(strXML);
if (objValue == null)
{
dt = GetConfigXml("//PayConfig/" + strXML);
SetCache(strXML, dt);
}
else
{
dt = (DataTable)objValue;
}
if (dt != null)
{
appid = dt.Rows[]["appid"].ToString();
mch_id = dt.Rows[]["mch_id"].ToString();
notify_url = dt.Rows[]["notify_url"].ToString();
pay_url = dt.Rows[]["pay_url"].ToString();
spbill_create_ip = GetUserIp();
nonce_str = StrRodamNo();
trade_type = dt.Rows[]["trade_type"].ToString();
key = dt.Rows[]["key"].ToString();
}
} /// <summary>
/// 获取当前应用程序指定CacheKey的Cache值
/// </summary>
/// <param name="CacheKey"></param>
/// <returns></returns>
public static object GetCache(string CacheKey)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
return objCache[CacheKey];
}
/// <summary>
/// 设置当前应用程序指定CacheKey的Cache值
/// </summary>
/// <param name="CacheKey"></param>
/// <param name="objObject"></param>
public static void SetCache(string CacheKey, object objObject)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
if (objObject != null)
objCache.Insert(CacheKey, objObject, null, DateTime.UtcNow.AddDays(), TimeSpan.Zero);
} /// <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) !=
&& "sign".CompareTo(kvParm.Key) != && "key".CompareTo(kvParm.Key) != && "sign_type".CompareTo(kvParm.Key) != )
{
if (sb.Length > )
{
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, , 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();
char[] Pattern = new char[] { '', '', '', '', '', '', '', '', '', '', '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 = ; i < Length; i++)
{
int rnd = random.Next(, 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)
{ }
return result;
} #endregion
}
}

配置文件XML :
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://5.20.7.8:300/PayNotifyPage/WXNativeNotifyPage</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>wxf888888888888</appid>
<!--微信支付分配的商户号-->
<mch_id>1485555555</mch_id>
<key>16ce99d5252525525252529d</key>
<subject>财政专费</subject>
<trade_type>NATIVE</trade_type>
</data>

Models 代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace WeChatPayMvc.Models
{
public class PayOrder
{
public PayOrder()
{ }
public string OrderNumber { get; set; }
public string OrderPrice { get; set; }
public int PayStatus { get; set; }
}
}

即可完成整个扫码支付过程, 有图有真相:

打开微信进行扫码支付即可。

最后说明 扫码支付 openID不需要传递

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