c# 使用timer定时器操作,上次定时到了以后,下次还未执行完怎么处理

c# 使用timer定时器操作,下次定时到了以后,上次还未执行完怎么办

------解决方案--------------------------------------------------------
开始的时候，禁用定时器，你可以在执行完毕之后再启用定时器

定时器定时执行某一个方法时，可能由于执行的时间长要比间隔的时间长，则这种情况可能导致线程并发性的问题。建议加上Lock
private static object LockObject = new Object();
private static void CheckUpdatetimer_Elapsed(object sender, ElapsedEventArgs e)
{
// 加锁检查更新锁
lock (LockObject)
{
}
}
// From command line, compile with /r:System.dll
using System;
using System.Timers;
using System.Threading;

public class Timer2
{
//static System.Windows.Forms.Timer aTimer = new System.Windows.Forms.Timer();

private static System.Timers.Timer aTimer;
static object o = new object();
public static void Main()
{
// Normally, the timer is declared at the class level,
// so that it stays in scope as long as it is needed.
// If the timer is declared in a long-running method,
// KeepAlive must be used to prevent the JIT compiler
// from allowing aggressive garbage collection to occur
// before the method ends. (See end of method.)
//System.Timers.Timer aTimer;

// Create a timer with a ten second interval.
aTimer = new System.Timers.Timer(2000);
aTimer.Enabled = true;

// Hook up the event handler for the Elapsed event.
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

// Only raise the event the first time Interval elapses.
aTimer.AutoReset = true;

Console.WriteLine("Press the Enter key to exit the program.");
Console.ReadLine();

// If the timer is declared in a long-running method, use
// KeepAlive to prevent garbage collection from occurring
// before the method ends.
//GC.KeepAlive(aTimer);
}

// Specify what you want to happen when the Elapsed event is
// raised.
static object name=0;
private static void OnTimedEvent(object source, ElapsedEventArgs e)
{
//lock (o)
{
aTimer.Enabled = false;
aTimer.Interval = 1000;
lock(name)
{
name = Convert.ToInt32(name) + 1;
Thread.CurrentThread.Name = name.ToString();
}
Console.WriteLine(DateTime.Now.ToString()+"-"+Thread.CurrentThread.Name);
//Thread.Sleep(1000000);
Waste();
aTimer.Enabled = true;
}

}

/// <summary>
/// 模拟长时间的操作
/// </summary>
public static void Waste()
{
for (int i = 0; i < Int32.MaxValue; i++)
{

}
//Thread.Sleep(10000);
Console.WriteLine(DateTime.Now.ToString()+"完成-"+Thread.CurrentThread.Name);
}
}