EventHandler中的C＃数据

Question

I have two functions. One creates a timer, other does action when timer expires. Timer function takes 1 additional argument (int). I need it to be passed to action. Here is the code to explain that:

 public void CreateTimer(int t)
    {
        System.Timers.Timer timer = new System.Timers.Timer();
        timer.Elapsed += new ElapsedEventHandler(DoAction(timer, ??, t));
        timer.Interval = 4000;
        timer.Enabled = true;
    }

As you can see, there is ?? in EventHandler , and I have no idea, what to put inside. Here is DoAction :

public void DoAction(object sender, ElapsedEventArgs e, int l)
    {
        //some stuff here
    }

How can I send int l ?

Answer 1

您可以将lambda表达式订阅到引用局部变量的事件。

timer.Elapsed += (s, e) => { DoAction(s, e, t); };