System.Threading.Timer

这个Timer比较原始

Timer t = new Timer(delegate(object o) {Console.WriteLine("...");}, null, 10000, 1000);

4个参数

1. TimerCallback

2. Object类型的state对象

3. 等待多久开始执行，如果设置为0则马上执行

4. 每次执行的时间间隔

 

这个Timer的回调函数在线程池中执行

 

没有静态方法，就两个实例方法Change和Dispose.

没法设置Start, Stop....很不方便，new 完之后直接开始干活。

 

MSDN:

As long as you are using a Timer, you must keep a reference to it. As with any managed object, a Timer is subject to garbage collection when there are no references to it. The fact that a Timer is still active does not prevent it from being collected.

 

推荐用System.Timers.Timer，这个要方便得多

 

下面是一个简单的样例：

class Program
{
    static void Main(string[] args)
    {
        MyState state = new MyState();
        Timer x = null;
        x = new Timer(delegate(object o) 
        {
            if (state.Counter == 3)//只运行3次
            {
                Console.WriteLine("3 times only!");
                x.Dispose();
                return;
            }
            MyState s = o as MyState;
            s.Counter++;

            Console.WriteLine("do");
        }, state, 2000, 1000);


        Console.ReadKey();
    }
}

class MyState
{
    public int Counter;
}

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