namespace ClientWindowsService
{
    public partial class ClientService : ServiceBase
    {
        public ClientService()
        {
            InitializeComponent();
        }

protected override void OnStart(string[] args)
        {
            //服务启动
      this.timEmail.Enabled = true;
            this.tSendEmail();
        }

protected override void OnStop()
        {
            //服务停止
      this.timEmail.Enabled = false;
        }

private void timEmail_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            //定时器
      this.tSendEmail();
        }

//开启新进程发送邮件
    private void tSendEmail()
        {
            Thread t = new Thread(new ThreadStart(sendEmail));
            t.Start();
        }

//发送邮件函数
    private void sendEmail()
        {
            XmlDocument doc = new XmlDocument();
            //添加System.Windows.Forms引用，获取执行目录
      string configFile = System.Windows.Forms.Application.StartupPath.ToString() + "\ServiceConfig.xml";
            doc.Load(@configFile);
            XmlElement root = doc.DocumentElement;
            foreach (XmlNode node in root)
            {
                //如果配置文件中开启服务
        if (node.Attributes["name"].Value == "sendEmail" && node.Attributes["enable"].Value == "true")
                {
                    try
                    {
                        //读取数据库，发送邮件操作，略
                    }
                    catch (Exception error)
                    {
                        //写错误日志
            using (StreamWriter sw = new StreamWriter(System.Windows.Forms.Application.StartupPath.ToString() + @"" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt", true, System.Text.Encoding.UTF8))
                        {
                            sw.WriteLine(DateTime.Now.ToString() + "：");
                            sw.WriteLine(error.ToString());
                            sw.WriteLine("---------------------------------------------");
                            sw.Close();
                        }
                    }
                }
            }//end foreach
        }

}//end class
}//end namespace