C# 企业微信消息推送

企业微信开发API文档链接。

第一步 注册企业微信

只需要填写下基本资料就可以。

第二步

记下企业微信 CorpID

第三步 创建应用，并记下 AgentId与Secret

第四步 写代码实现App内推送消息

1. 新建项目(本文以类库项目为例)
   
   在实际项目项目中引用时，需配置一下关键值。
   
   CorpSendBase：企业号发送消息的基类,因为消息类别有多种，可以推送文本、图片、视频、文件、图文等类型。

   /// <summary>
   /// 企业号发送消息的基础消息内容
   /// </summary>
   class CorpSendBase
   {
       /// <summary>
       /// UserID列表（消息接收者，多个接收者用‘|’分隔）。特殊情况：指定为@all，则向关注该企业应用的全部成员发送
       /// </summary>
       public string touser { get; set; }
       /// <summary>
       /// PartyID列表，多个接受者用‘|’分隔。当touser为@all时忽略本参数
       /// </summary>
       public string toparty { get; set; }
       /// <summary>
       /// TagID列表，多个接受者用‘|’分隔。当touser为@all时忽略本参数
       /// </summary>
       public string totag { get; set; }
       /// <summary>
       /// 消息类型
       /// </summary>
       public string msgtype { get; set; }
       /// <summary>
       /// 企业应用的id，整型。可在应用的设置页面查看
       /// </summary>
       public string agentid { get; set; }
       /// <summary>
       /// 表示是否是保密消息，0表示否，1表示是，默认0
       /// </summary>
       [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
       public string safe { get; set; }
       public CorpSendBase()
       {
           this.agentid = System.Configuration.ConfigurationManager.AppSettings["CorpSendBaseAgentID"].ToString();
           this.safe = "0";
       }
   }

   CorpSendText：用来发送文本消息。

   class Text
   {
       private string _content;
       /// <summary>
       /// 要发送的文本内容字段，必须小写，企业微信API不识别大写。
       /// </summary>
       public string content
       {
           get { return _content; }
           set { _content = value; }
       }
   
   }
   class CorpSendText: CorpSendBase
   {
       private Text _text;
       /// <summary>
       /// 要发送的文本，必须小写，企业微信API不识别大写。
       /// </summary>
       public Text text
       {
           get { return _text; }
           set { this._text = value; }
       }
   
   
       public CorpSendText(string content)
       {
           base.msgtype = "text";
           this.text = new Text
           {
               content = content
           };
       }
   }

   QYWeixinHelper:消息发送工具类。

   public class QYWeixinHelper
   {
       static string corpid = System.Configuration.ConfigurationManager.AppSettings["corpid"].ToString();
       static string corpsecret = System.Configuration.ConfigurationManager.AppSettings["secret"].ToString();
       static string messageSendURI = System.Configuration.ConfigurationManager.AppSettings["messageSendURI"].ToString();
   
       /// <summary>
       /// 获取企业号的accessToken
       /// </summary>
       /// <param name="corpid">企业号ID</param>
       /// <param name="corpsecret">管理组**</param>
       /// <returns></returns>
       static string GetQYAccessToken(string corpid, string corpsecret)
       {
           string getAccessTokenUrl = System.Configuration.ConfigurationManager.AppSettings["getAccessTokenUrl"].ToString(); 
           string accessToken = "";
   
           string respText = "";
   
           //获取josn数据
           string url = string.Format(getAccessTokenUrl, corpid, corpsecret);
   
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
           HttpWebResponse response = (HttpWebResponse)request.GetResponse();
   
           using (Stream resStream = response.GetResponseStream())
           {
               StreamReader reader = new StreamReader(resStream, Encoding.Default);
               respText = reader.ReadToEnd();
               resStream.Close();
           }
   
           try
           {
               JavaScriptSerializer Jss = new JavaScriptSerializer();
               Dictionary<string, object> respDic = (Dictionary<string, object>)Jss.DeserializeObject(respText);
               //通过键access_token获取值
               accessToken = respDic["access_token"].ToString();
           }
           catch (Exception) { }
   
           return accessToken;
       }
   
       /// <summary>
       /// Post数据接口
       /// </summary>
       /// <param name="postUrl">接口地址</param>
       /// <param name="paramData">提交json数据</param>
       /// <param name="dataEncode">编码方式</param>
       /// <returns></returns>
       static string PostWebRequest(string postUrl, string paramData, Encoding dataEncode)
       {
           string ret = string.Empty;
           try
           {
               byte[] byteArray = dataEncode.GetBytes(paramData); //转化
               HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
               webReq.Method = "POST";
               webReq.ContentType = "application/x-www-form-urlencoded";
   
               webReq.ContentLength = byteArray.Length;
               Stream newStream = webReq.GetRequestStream();
               newStream.Write(byteArray, 0, byteArray.Length);//写入参数
               newStream.Close();
               HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
               StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
               ret = sr.ReadToEnd();
               sr.Close();
               response.Close();
               newStream.Close();
           }
           catch (Exception ex)
           {
               return ex.Message;
           }
           return ret;
       }
   
       /// <summary>
       /// 推送信息
       /// </summary>
       /// <param name="corpid">企业号ID</param>
       /// <param name="corpsecret">管理组**</param>
       /// <param name="paramData">提交的数据json</param>
       /// <param name="dataEncode">编码方式</param>
       /// <returns></returns>
       public static void SendText(string empCode, string message)
       {
           string accessToken = "";
           string postUrl = "";
           string param = "";
           string postResult = "";
   
           accessToken = GetQYAccessToken(corpid, corpsecret);
           postUrl = string.Format(messageSendURI, accessToken);
           CorpSendText paramData = new CorpSendText(message);
           foreach (string item in empCode.Split('|'))
           {
               //paramData.touser = GetOAUserId(item);//在实际应用中需要判断接收消息的成员是否在系统账号中存在。
               paramData.touser = item;
               param = JsonConvert.SerializeObject(paramData);
               if (paramData.touser != null)
               {
                   postResult = PostWebRequest(postUrl, param, Encoding.UTF8);
               }
               else
               {
                   postResult = "账号" + paramData.touser + "在OA中不存在!";
               }
               CreateLog(DateTime.Now.ToString("yyyy-MM-dd HH:mm:sss") + ":\t" + item + "\t" + param + "\t" + postResult);
           }
       }
   
       private static void CreateLog(string strlog)
       {
           string str1 = "QYWeixin_log" + DateTime.Now.ToString("yyyyMMdd") + ".txt";
           //BS CS应用日志自适应
           string path = System.Web.HttpContext.Current == null ? Path.GetFullPath("..") + "\\temp\\" : System.Web.HttpContext.Current.Server.MapPath("temp");
           try
           {
               if (!Directory.Exists(path))
               {
                   Directory.CreateDirectory(path);
               }
               path = Path.Combine(path, str1);
               StreamWriter sw = File.AppendText(path);
               sw.WriteLine(strlog);
               sw.Flush();
               sw.Close();
   
           }
           catch
           {
           }
       }

第五步 测试消息推送

    class Program
    {
        static void Main(string[] args)
        {
            string touser = "Kiaka";";
            Console.WriteLine("回车终止：");
            do
            {
                QYWeixin.QYWeixinHelper.SendText(touser, "消息推送测试_：</br>"+"a:"+"xxx" + DateTime.Now.ToString());
            } while (Console.ReadKey().Key != ConsoleKey.Enter);
        }
    }