public partial class Service1 : ServiceBase
    {
        private int num = 1;
        public Service1()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 启动服务
        /// </summary>
        /// <param name="args"></param>
        protected override void OnStart(string[] args)
        {
            serviceLog("service Start.");

            // Set up a timer that triggers every minute. 设置定时器
            Timer timer = new Timer();
            timer.Interval = 60000; // 60 seconds 60秒执行一次
            timer.Elapsed += new ElapsedEventHandler(this.OnTimer);
            timer.Start();
        }

        /// <summary>
        /// 停止服务
        /// </summary>
        protected override void OnStop()
        {
            serviceLog("service Stop.");
        }

        /// <summary>
        /// 继续服务
        /// </summary>
        protected override void OnContinue()
        {
            serviceLog("service OnContinue.");
        }

        /// <summary>
        /// 定时器中定时执行的任务
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        public void OnTimer(object sender, ElapsedEventArgs args)
        {
            DataLog dataLog = new DataLog();
            #region//执行的事件            
            try
            {
                ////记录数据日志
                dataLog.WriteLogEx("第" + num + "次执行!");
                num++;
            }
            catch (Exception ex)
            {
                dataLog.ErrorLog(ex.Message);
            }


            #endregion


            serviceLog("service Execute.");
        }



        /// <summary>
        /// 服务日志记录到指定路径：D:\serviceLog.txt
        /// </summary>
        /// <param name="message"></param>
        private static void serviceLog(string message)
        {
            using (FileStream stream = new FileStream("D:\\serviceLog.txt", FileMode.Append))
            using (StreamWriter writer = new StreamWriter(stream))
            {
                writer.WriteLine($"{DateTime.Now}:{message}");
            }
        }


    }

public class DataLog
    {
        #region 写日志
        public void WriteLogEx(string dataInfo, string fileName = "")
        {
            string path = AppDomain.CurrentDomain.BaseDirectory;
            string logDir = "log";
            logDir += "\\" + DateTime.Now.ToString("yyyy") + "\\" + DateTime.Now.ToString("MM");
            path = Path.Combine(path, logDir);
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            try
            {
                StringBuilder log = new StringBuilder();
                log.Append(Environment.NewLine);
                log.Append("================BEGIN");
                log.Append(DateTime.Now);
                log.Append("================");
                log.Append(Environment.NewLine);
                log.Append(dataInfo);
                log.Append(Environment.NewLine);
                log.Append("================END ");
                log.Append(DateTime.Now);
                log.Append("================");
                log.Append(Environment.NewLine);

                fileName = string.IsNullOrWhiteSpace(fileName) ? DateTime.Now.Day.ToString() + "日" : fileName;
                fileName = fileName + ".txt";
                string file = Path.Combine(path, fileName);
                System.IO.File.AppendAllText(file, log.ToString(), System.Text.Encoding.Default);
            }
            catch { }
        }
        #endregion

        #region 错误日志
        public void ErrorLog(string ExInfo, string fileName = "")
        {
            string path = AppDomain.CurrentDomain.BaseDirectory;
            string logDir = "ErrLog";
            logDir += "\\" + DateTime.Now.ToString("yyyy") + "\\" + DateTime.Now.ToString("MM");
            path = Path.Combine(path, logDir);
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            try
            {
                StringBuilder log = new StringBuilder();
                log.Append(Environment.NewLine);
                log.Append("================BEGIN");
                log.Append(DateTime.Now);
                log.Append("================");
                log.Append(Environment.NewLine);
                log.Append(ExInfo);
                log.Append(Environment.NewLine);
                log.Append("================END ");
                log.Append(DateTime.Now);
                log.Append("================");
                log.Append(Environment.NewLine);

                fileName = string.IsNullOrWhiteSpace(fileName) ? DateTime.Now.Day.ToString() + "日" : fileName;
                fileName = fileName + ".txt";
                string file = Path.Combine(path, fileName);
                System.IO.File.AppendAllText(file, log.ToString(), System.Text.Encoding.Default);
            }
            catch { }
        }
        #endregion
    }