微信小程序支付C#后端源码

本文实例为大家分享了微信小程序支付C#后端源码，供大家参考，具体内容如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace Mvc_vue.Controllers
{
  public class wxController : Controller
  {
    //
    // GET: /wx/

    public ActionResult Index()
    {
      return View();
    }
    //所需值
    public static string _appid = "wxd930ea5d5a258f4f";
    public static string _mch_id = "10000100";
    public static string _key = "192006250b4c09247ec02edce69f6a2d";

    //模拟wx统一下单 openid(前台获取)
    public string getda(string openid)
    {
      return Getprepay_id(_appid, "shanghaifendian", "monixiaofei", _mch_id, GetRandomString(30), "http://www.weixin.qq.com/wxpay/pay.php", openid, getRandomTime(), 1);

    }

    //微信统一下单获取prepay_id & 再次签名返回数据
    private static string Getprepay_id(string appid, string attach, string body, string mch_id, string nonce_str, string notify_url, string openid, string bookingNo, int total_fee)
    {
      var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信统一下单请求地址
      string strA = "appid=" + appid + "&attach=" + attach + "&body=" + body + "&mch_id=" + mch_id + "&nonce_str=" + nonce_str + "&notify_url=" + notify_url + "&openid=" + openid + "&out_trade_no=" + bookingNo + "&spbill_create_ip=61.50.221.43&total_fee=" + total_fee + "&trade_type=JSAPI";
      string strk = strA + "&key="+_key; //key为商户平台设置的密钥key(假)
      string strMD5 = MD5(strk).ToUpper();//MD5签名

      //string strHash=HmacSHA256("sha256",strmd5).ToUpper();  //签名方式只需一种(MD5 或 HmacSHA256   【支付文档需仔细看】)

      //签名
      var formData = "<xml>";
      formData += "<appid>" + appid + "</appid>";//appid
      formData += "<attach>" + attach + "</attach>"; //附加数据(描述)
      formData += "<body>" + body + "</body>";//商品描述
      formData += "<mch_id>" + mch_id + "</mch_id>";//商户号
      formData += "<nonce_str>" + nonce_str + "</nonce_str>";//随机字符串，不长于32位。
      formData += "<notify_url>" + notify_url + "</notify_url>";//通知地址
      formData += "<openid>" + openid + "</openid>";//openid
      formData += "<out_trade_no>" + bookingNo + "</out_trade_no>";//商户订单号  --待
      formData += "<spbill_create_ip>61.50.221.43</spbill_create_ip>";//终端IP --用户ip
      formData += "<total_fee>" + total_fee + "</total_fee>";//支付金额单位为（分）
      formData += "<trade_type>JSAPI</trade_type>";//交易类型(JSAPI--公众号支付)
      formData += "<sign>" + strMD5 + "</sign>"; //签名
      formData += "</xml>";

      //请求数据
      var getdata = sendPost(url, formData);

      //获取xml数据
      XmlDocument doc = new XmlDocument();
      doc.LoadXml(getdata);
      //xml格式转json
      string json = Newtonsoft.Json.JsonConvert.SerializeXmlNode(doc);

      JObject jo = (JObject)JsonConvert.DeserializeObject(json);
      string prepay_id = jo["xml"]["prepay_id"]["#cdata-section"].ToString();

      //时间戳
      string _time = getTime().ToString();

      //再次签名返回数据至小程序
      string strB = "appId=" + appid + "&nonceStr=" + nonce_str + "&package=prepay_id=" + prepay_id + "&signType=MD5&timeStamp=" + _time + "&key="_key;

      wx w = new wx();
      w.timeStamp = _time;
      w.nonceStr = nonce_str;
      w.package = "prepay_id=" + prepay_id;
      w.paySign = MD5(strB).ToUpper(); ;
      w.signType = "MD5";

      //向小程序发送json数据
       return JsonConvert.SerializeObject(w);
    }

    /// <summary>
    /// 生成随机串
    /// </summary>
    /// <param name="length">字符串长度</param>
    /// <returns></returns>
    private static string GetRandomString(int length)
    {
      const string key = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789";
      if (length < 1)
        return string.Empty;

      Random rnd = new Random();
      byte[] buffer = new byte[8];

      ulong bit = 31;
      ulong result = 0;
      int index = 0;
      StringBuilder sb = new StringBuilder((length / 5 + 1) * 5);

      while (sb.Length < length)
      {
        rnd.NextBytes(buffer);

        buffer[5] = buffer[6] = buffer[7] = 0x00;
        result = BitConverter.ToUInt64(buffer, 0);

        while (result > 0 && sb.Length < length)
        {
          index = (int)(bit & result);
          sb.Append(key[index]);
          result = result >> 5;
        }
      }
      return sb.ToString();
    }

    /// <summary>
    /// 获取时间戳
    /// </summary>
    /// <returns></returns>
    private static long getTime()
    {
      TimeSpan cha = (DateTime.Now - TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1)));
      long t = (long)cha.TotalSeconds;
      return t;
    }

    /// <summary>
    /// MD5签名方法
    /// </summary>
    /// <param name="inputText">加密参数</param>
    /// <returns></returns>
    private static string MD5(string inputText)
    {
      MD5 md5 = new MD5CryptoServiceProvider();
      byte[] fromData = System.Text.Encoding.UTF8.GetBytes(inputText);
      byte[] targetData = md5.ComputeHash(fromData);
      string byte2String = null;

      for (int i = 0; i < targetData.Length; i++)
      {
        byte2String += targetData[i].ToString("x2");
      }

      return byte2String;
    }
    /// <summary>
    /// HMAC-SHA256签名方式
    /// </summary>
    /// <param name="message"></param>
    /// <param name="secret"></param>
    /// <returns></returns>
    private static string HmacSHA256(string message, string secret)
    {
      secret = secret ?? "";
      var encoding = new System.Text.UTF8Encoding();
      byte[] keyByte = encoding.GetBytes(secret);
      byte[] messageBytes = encoding.GetBytes(message);
      using (var hmacsha256 = new HMACSHA256(keyByte))
      {
        byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
        return Convert.ToBase64String(hashmessage);
      }
    }

    /// <summary>
    /// wx统一下单请求数据
    /// </summary>
    /// <param name="URL">请求地址</param>
    /// <param name="urlArgs">参数</param>
    /// <returns></returns>
    private static string sendPost(string URL, string urlArgs)
    {
      //context.Request["args"]
      System.Net.WebClient wCient = new System.Net.WebClient();
      wCient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
      byte[] postData = System.Text.Encoding.ASCII.GetBytes("body=" + urlArgs);

      byte[] responseData = wCient.UploadData(URL, "POST", postData);

      string returnStr = System.Text.Encoding.UTF8.GetString(responseData);//返回接受的数据
      return returnStr;202     }

    /// <summary>
    /// 生成订单号
    /// </summary>
    /// <returns></returns>
    private static string getRandomTime()
    {
      Random rd = new Random();//用于生成随机数
      string DateStr = DateTime.Now.ToString("yyyyMMddHHmmssMM");//日期
      string str = DateStr + rd.Next(10000).ToString().PadLeft(4, '0');//带日期的随机数
      return str;
    }

  }
}

使用的是MVC .NET Framework4

微信小程序支付前端源码

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