windows服务使用

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
namespace WinService
{
    public partial class WinService : ServiceBase
    {
        private System.Timers.Timer theTimer = new System.Timers.Timer();//定时器
        private double timespan;//服务执行的时间间隔
        public WinService()
        {
            InitializeComponent();
            this.theTimer.Elapsed += new System.Timers.ElapsedEventHandler(this.theTimer_Elapsed);
        }
        /// <summary>
        /// 服务启动时执行的函数
        /// </summary>
        /// <param name="args"></param>
        protected override void OnStart(string[] args)
        {
            // TODO: 在此处添加代码以启动服务。
            try
            {
                theTimer.Start();
                timespan =
Convert.ToDouble(System.Configuration.ConfigurationManager.AppSettings["timespan"]);
                theTimer.Interval = timespan * 60 * 1000;//转换为毫秒
            }
            catch (Exception ex)
            {
                  EventLog.WriteEntry("WinService服务启动","错误："+ex.Message);
            }
           
        }
        /// <summary>
        /// 定时触发事件函数
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void theTimer_Elapsed(object sender,System.Timers.ElapsedEventArgs e)
        {
            try
            {
                BLog();
            }
            catch (Exception ex)
            {
                EventLog.WriteEntry("WinService服务", ex.Message + DateTime.Now.ToString());
            }
        }
/// <summary>
        /// 逻辑处理函数
        /// </summary>
        public void BLog()
        {
            DateTime nowTime = DateTime.Now;
            EventLog.WriteEntry("WinService服务", nowTime.ToString());
        }
        /// <summary>
        /// 服务停止时执行的函数
        /// </summary>
        protected override void OnStop()
        {
            // TODO: 在此处添加代码以执行停止服务所需的关闭操作。
            EventLog.WriteEntry("WinService服务停止",  DateTime.Now.ToString());
        }
    }
}