Question

I have the following EventHandler to which I added a parameter MusicNote music:

public void PlayMusicEvent(object sender, EventArgs e,MusicNote music)
{
    music.player.Stop();
    System.Timers.Timer myTimer = (System.Timers.Timer)sender;
    myTimer.Stop();
}

I need to add the handler to a Timer like so:

myTimer.Elapsed += new ElapsedEventHandler(PlayMusicEvent(this, e, musicNote));

but get the error:

“Method name expected”

EDIT: In this case I just pass e from the method which contains this code snippet, how would I pass the timer’s own EventArgs?

Answer 1

Timer.Elapsed expects method of specific signature (with arguments object and EventArgs). If you want to use your PlayMusicEvent method with additional argument evaluated during event registration, you can use lambda expression as an adapter:

myTimer.Elapsed += new ElapsedEventHandler((sender, e) => PlayMusicEvent(sender, e, musicNote));

Edit: you can also use shorter version:

myTimer.Elapsed += (sender, e) => PlayMusicEvent(sender, e, musicNote);