using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace CY.WebForm.Helper
{
    /// <summary>
    /// 后台定时任务
    /// </summary>
    public class TimeTaskHelper
    {
     
            public event System.Timers.ElapsedEventHandler ExecuteTask;

            private static readonly TimeTaskHelper _task = null;
            private System.Timers.Timer _timer = null;


            //定义时间
            private int _interval = 1000;
            public int Interval
            {
                set
                {
                    _interval = value;
                }
                get
                {
                    return _interval;
                }
            }

            static TimeTaskHelper()
            {
                _task = new TimeTaskHelper();
            }

            public static TimeTaskHelper Instance()
            {
                return _task;
            }

            //开始
            public void Start()
            {
                if (_timer == null)
                {
                    _timer = new System.Timers.Timer(_interval);
                    _timer.Elapsed += new System.Timers.ElapsedEventHandler(_timer_Elapsed);
                    _timer.Enabled = true;
                    _timer.Start();
                }
            }

            protected void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
            {
                if (null != ExecuteTask)
                {
                    ExecuteTask(sender, e);
                }
            }

            //停止
            public void Stop()
            {
                if (_timer != null)
                {
                    _timer.Stop();
                    _timer.Dispose();
                    _timer = null;
                }
            }

        
    }
}