C#公眾號開發(fā)之給用戶發(fā)紅包

更新時間：2020年09月13日 08:41:55 作者：小碼農i

這篇文章主要為大家詳細介紹了C#公眾號開發(fā)之給用戶發(fā)紅包，文中示例代碼介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們可以參考一下

紅包功能簡單介紹：

1、商戶調用接口時，通過指定發(fā)送對象以及發(fā)送金額的方式發(fā)放紅包，這樣的方式，允許商戶靈活的應用于各種各樣豐富的活動場景

2、領取到紅包后，用戶的資金直接進入微信零錢，避免繁復的領獎流程，帶給用戶微信支付原生的流暢體驗

現金紅包官網文檔地址

調用現金紅包接口需要使用到證書，請前往商戶平臺下載證書

官網有關詳細證書的介紹，點擊查看

因為發(fā)送現金紅包是從商戶平臺余額扣款，所以商戶平臺的賬戶余額必須有充足的余額

下面是調用紅包接口詳細代碼：

1、簽名的MD5加密類：

/// <summary>
/// MD5UtilHelper 的摘要說明。
/// </summary>
public class MD5UtilHelper
{
 public MD5UtilHelper()
 {
  //
  // TODO: 在此處添加構造函數邏輯
  //
 }

 /// <summary>
   /// 獲取大寫的MD5簽名結果
 /// </summary>
 /// <param name="encypStr"></param>
 /// <param name="charset"></param>
 /// <returns></returns>
 public static string GetMD5(string encypStr, string charset)
 {
  string retStr;
  MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();

  //創(chuàng)建md5對象
  byte[] inputBye;
  byte[] outputBye;

  //使用GB2312編碼方式把字符串轉化為字節(jié)數組．
  try
  {
   inputBye = Encoding.GetEncoding(charset).GetBytes(encypStr);
  }
  catch (Exception ex)
  {
   inputBye = Encoding.GetEncoding("GB2312").GetBytes(encypStr);
  }
  outputBye = m5.ComputeHash(inputBye);

  retStr = System.BitConverter.ToString(outputBye);
  retStr = retStr.Replace("-", "").ToUpper();
  return retStr;
 }
}

2、處理參數的類：

public class RequestHandler
 {

  public RequestHandler(HttpContext httpContext)
  {
   Parameters = new Hashtable();

   this.HttpContext = httpContext ?? HttpContext.Current;

  }
  /// <summary>
  /// 密鑰
  /// </summary>
  private string Key;

  protected HttpContext HttpContext;

  /// <summary>
  /// 請求的參數
  /// </summary>
  protected Hashtable Parameters;

  /// <summary>
  /// debug信息
  /// </summary>
  private string DebugInfo;

  /// <summary>
  /// 初始化函數
  /// </summary>
  public virtual void Init()
  {
  }
  /// <summary>
  /// 獲取debug信息
  /// </summary>
  /// <returns></returns>
  public String GetDebugInfo()
  {
   return DebugInfo;
  }
  /// <summary>
  /// 獲取密鑰
  /// </summary>
  /// <returns></returns>
  public string GetKey()
  {
   return Key;
  }
  /// <summary>
  /// 設置密鑰
  /// </summary>
  /// <param name="key"></param>
  public void SetKey(string key)
  {
   this.Key = key;
  }

  /// <summary>
  /// 設置參數值
  /// </summary>
  /// <param name="parameter"></param>
  /// <param name="parameterValue"></param>
  public void SetParameter(string parameter, string parameterValue)
  {
   if (parameter != null && parameter != "")
   {
    if (Parameters.Contains(parameter))
    {
     Parameters.Remove(parameter);
    }

    Parameters.Add(parameter, parameterValue);
   }
  }


  /// <summary>
  /// 創(chuàng)建md5摘要,規(guī)則是:按參數名稱a-z排序,遇到空值的參數不參加簽名
  /// </summary>
  /// <param name="key">參數名</param>
  /// <param name="value">參數值</param>
  /// key和value通常用于填充最后一組參數
  /// <returns></returns>
  public virtual string CreateMd5Sign(string key, string value)
  {
   StringBuilder sb = new StringBuilder();

   ArrayList akeys = new ArrayList(Parameters.Keys);
   akeys.Sort();

   foreach (string k in akeys)
   {
    string v = (string)Parameters[k];
    if (null != v && "".CompareTo(v) != 0
     && "sign".CompareTo(k) != 0 && "key".CompareTo(k) != 0)
    {
     sb.Append(k + "=" + v + "&");
    }
   }

   sb.Append(key + "=" + value);
   string sign = MD5UtilHelper.GetMD5(sb.ToString(), GetCharset()).ToUpper();

   return sign;
  }

  /// <summary>
  /// 輸出XML
  /// </summary>
  /// <returns></returns>
  public string ParseXML()
  {
   StringBuilder sb = new StringBuilder();
   sb.Append("<xml>");
   foreach (string k in Parameters.Keys)
   {
    string v = (string)Parameters[k];
    if (Regex.IsMatch(v, @"^[0-9.]$"))
    {

     sb.Append("<" + k + ">" + v + "</" + k + ">");
    }
    else
    {
     sb.Append("<" + k + "><![CDATA[" + v + "]]></" + k + ">");
    }

   }
   sb.Append("</xml>");
   return sb.ToString();
  }


  /// <summary>
  /// 設置debug信息
  /// </summary>
  /// <param name="debugInfo"></param>
  public void SetDebugInfo(String debugInfo)
  {
   this.DebugInfo = debugInfo;
  }

  public Hashtable GetAllParameters()
  {
   return this.Parameters;
  }

  protected virtual string GetCharset()
  {
   return this.HttpContext.Request.ContentEncoding.BodyName;
  }
 }

3、調用現金紅包處理類：

 /// <summary>
 /// 企業(yè)號微信支付接口
 /// </summary>
 public static class TenPay
 {

  #region 企業(yè)向用戶發(fā)紅包
  /// <summary>
  /// 用于企業(yè)向微信用戶個人發(fā)紅包
  /// 目前支持向指定微信用戶的openid個人發(fā)紅包
  /// </summary>
  /// <param name="certPassword">apiclient_cert.p12證書密碼即商戶號</param>
  /// <param name="data">微信支付需要post的xml數據</param>
  /// <param name="certPath">apiclient_cert.p12的證書物理位置(例如：E:\projects\文檔\微信商戶平臺證書\商戶平臺API證書</param>
  /// <param name="timeOut"></param>
  /// <returns></returns>
  public static string Sendredpack(string data, string certPassword,string certPath, int timeOut = Config.TIME_OUT)
  {
   var urlFormat = "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack";
   string cert = certPath;

   ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
   X509Certificate2 cer = new X509Certificate2(cert, certPassword, X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.MachineKeySet);

   var formDataBytes = data == null ? new byte[0] : Encoding.UTF8.GetBytes(data);
   MemoryStream ms = new MemoryStream();
   ms.Write(formDataBytes, 0, formDataBytes.Length);
   ms.Seek(0, SeekOrigin.Begin);//設置指針讀取位置

   HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlFormat);
   request.ClientCertificates.Add(cer);
   request.Method = "POST";
   request.Timeout = timeOut;

   request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36";

   #region 輸入二進制流
   if (ms != null)
   {
    ms.Position = 0;
    //直接寫入流
    Stream requestStream = request.GetRequestStream();
    byte[] buffer = new byte[1024];
    int bytesRead = 0;
    while ((bytesRead = ms.Read(buffer, 0, buffer.Length)) != 0)
    {
     requestStream.Write(buffer, 0, bytesRead);
    }
    ms.Close();//關閉文件訪問
   }
   #endregion

   HttpWebResponse response = (HttpWebResponse)request.GetResponse();

   using (Stream responseStream = response.GetResponseStream())
   {
    using (StreamReader myStreamReader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8")))
    {
     string retString = myStreamReader.ReadToEnd();
     return retString;
    }
   }
  }
  private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
  {
   if (errors == SslPolicyErrors.None)
    return true;
   return false;
  }
  #endregion

 }

4、調用現金紅包接口

#region 發(fā)送紅包
bool fals = false; //記錄發(fā)送紅包是否成功
string xmlResult = null; //現金紅包接口返回的xml
string certPath = null; //證書在服務器的物理位置
string data = null; //調用現金紅包接口需要的數據
try
{
 //創(chuàng)建支付應答對象
 RequestHandler packageReqHandler = new RequestHandler(null);
 //初始化
 packageReqHandler.Init();
 string nonceStr = TenPayV3Util.GetNoncestr(); //時間戳
 //設置package訂單參數
 packageReqHandler.SetParameter("nonce_str", nonceStr); //隨機字符串，不長于32位
 packageReqHandler.SetParameter("mch_billno", System.Configuration.ConfigurationManager.AppSettings["TenPayV3_MchId"] + model.JournalNumber);//商戶訂單號（每個訂單號必須唯一）組成：mch_id+yyyymmdd+10位一天內不能重復的數字。接口根據商戶訂單號支持重入，如出現超時可再調用。
 packageReqHandler.SetParameter("mch_id", System.Configuration.ConfigurationManager.AppSettings["TenPayV3_MchId"]); //微信支付分配的商戶號
 packageReqHandler.SetParameter("wxappid", System.Configuration.ConfigurationManager.AppSettings["TenPayV3_AppId"]);//微信分配的公眾賬號ID（企業(yè)號corpid即為此appId）。接口傳入的所有appid應該為公眾號的appid（在mp.weixin.qq.com申請的），不能為APP的appid（在open.weixin.qq.com申請的）。 
 packageReqHandler.SetParameter("send_name", "測試");//商戶名稱
 packageReqHandler.SetParameter("re_openid", model.BankCard); //用戶openid 接受紅包的用戶用戶在wxappid下的openid
 packageReqHandler.SetParameter("total_amount", Convert.ToInt32((decimal)(model.Amount * 100M)).ToString(CultureInfo.InvariantCulture)); //付款金額 單位分
 packageReqHandler.SetParameter("total_num", "1"); //紅包發(fā)放總人數
 packageReqHandler.SetParameter("wishing", "測試紅包"); //紅包祝福語
 packageReqHandler.SetParameter("client_ip", HttpContext.Current.Request.UserHostAddress);//Ip地址
 packageReqHandler.SetParameter("act_name", "測試紅包");//活動名稱
 packageReqHandler.SetParameter("remark", "測試紅包");  //備注
 string sign = packageReqHandler.CreateMd5Sign("key", System.Configuration.ConfigurationManager.AppSettings["TenPayV3_Key"]);
 packageReqHandler.SetParameter("sign", sign);      //簽名
 data = packageReqHandler.ParseXML();
 certPath = Server.MapPath("~/") + System.Configuration.ConfigurationManager.AppSettings["certPath"];
 xmlResult = Sendredpack(data, System.Configuration.ConfigurationManager.AppSettings["TenPayV3_MchId"],certPath);
 var res = XDocument.Parse(xmlResult);
 string return_code = res.Element("xml").Element("return_code").Value;
 if ("SUCCESS".Equals(return_code))
 {
  string result_code = res.Element("xml").Element("result_code").Value;
  if ("SUCCESS".Equals(result_code))
  {
   fals = true;
  }
 }
}
catch (Exception exception)
{
}
#endregion

注意：證書所在文件夾權限，IIS必須有權限對該文件夾操作的權限。

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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