System.timers.timer数组问题，

Question

我写了一个timer数组，程序执行时，三个timer事件结果都是"第3个定时器启动...";
代码如下：我想得到的结果是：“第1个定时器启动。。”，“第2个定时器启动。。”，
"第3个定时器启动...";  求各位大虾如何修改代码。
 
private void button1_Click(object sender, EventArgs e)
        {
            SetTimer();
        }
        private void SetTimer()
        {
            System.Timers.Timer[] timer = new System.Timers.Timer[3];
            for (int i = 0; i < timer.Length; i++)
            {
                timer[i] = new System.Timers.Timer();
                timer[i].Interval = 3000;
               
                timer[i].Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
                {
                    Timers_Elapsed(sender,e,i);
                };
                 timer[i].AutoReset = false;
                timer[i].Start();
            }
            System.Threading.Thread.Sleep(5000);
        }        private static void Timers_Elapsed(object sender, System.Timers.ElapsedEventArgs e, int i)
        {
            System.Timers.Timer theTimer = (System.Timers.Timer)sender;
            theTimer.Stop();
           MessageBox.Show("第"+i.ToString()+"个定时器"+DateTime.Now.ToString());
        }

Answer 1

楼主的写法太绕人：
闭包的问题。
下面这个可以:
 private void SetTimer()
        {
            System.Timers.Timer[] timer = new System.Timers.Timer[3];
            for (int i = 0; i < timer.Length; i++)
            {
                timer[i] = new System.Timers.Timer();
                timer[i].Interval = 3000;                int __________i = i;
                timer[i].Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
                {
                    System.Timers.Timer theTimer = (System.Timers.Timer)sender;
                    theTimer.Stop();
                    Console.WriteLine("第" + __________i.ToString() + "个定时器" + DateTime.Now.ToString());
                };                timer[i].AutoReset = false;
                timer[i].Start();
            }
            System.Threading.Thread.Sleep(5000);
        }

Answer 2

或者： private void SetTimer()
        {
            System.Timers.Timer[] timer = new System.Timers.Timer[3];
            for (int i = 0; i < timer.Length; i++)
            {
                timer[i] = new System.Timers.Timer();
                timer[i].Interval = 3000;                int ___________i = i;
                timer[i].Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
                {
                    Timers_Elapsed(sender, e, ___________i);
                };                timer[i].AutoReset = false;
                timer[i].Start();
            }
            System.Threading.Thread.Sleep(5000);
        }        private static void Timers_Elapsed(object sender, System.Timers.ElapsedEventArgs e, int i)
        {
            System.Timers.Timer theTimer = (System.Timers.Timer)sender;
            theTimer.Stop();
            Console.WriteLine("第" + i.ToString() + "个定时器" + DateTime.Now.ToString());
        }

Answer 3

问开发环境 是想用lambda表达式写。

Answer 4

private void button1_Click(object sender, EventArgs e)
        {
            SetTimer();
        }
        private void SetTimer()
        {
            System.Timers.Timer[] timer = new System.Timers.Timer[3];
            for (int i = 0; i < timer.Length; i++)
            {
                int count=i;
                timer[i] = new System.Timers.Timer();
                timer[i].Interval = 3000;
               
                timer[i].Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
                {
                    Timers_Elapsed(sender,e,count);
                };
                 timer[i].AutoReset = false;
                timer[i].Start();
            }
            System.Threading.Thread.Sleep(5000);
        }        private static void Timers_Elapsed(object sender, System.Timers.ElapsedEventArgs e, int i)
        {
            System.Timers.Timer theTimer = (System.Timers.Timer)sender;
            theTimer.Stop();
           MessageBox.Show("第"+i.ToString()+"个定时器"+DateTime.Now.ToString());
        }加了一行 int count=i;
i是for以外的变量，等定时器时间到了，i早就自加了三次...