event handler

[bpfa]

hi
there is a way to obtain the handler's list for a specific event of an
object?

thanks

 

[FrzzMan]

hi
there is a way to obtain the handler's list for a specific event of an
object?

thanks

I think only one handler can assign to one control's event? BTW, I don't
know much about C# yet, can you assign more than one handler to one
control's event?

 

[bpfa]

.....
private Button btn;
.....

btn = new Button();
....
btn.Click += new EventHandler(OnClick);
btn.Click += new EventHandler(OnClick2);

......

private void OnClick(object sender, EventArgs e)
{
MessageBox.Show("OnClick");
}

private void OnClick2(object sender, EventArgs e)
{
MessageBox.Show("OnClick2");
}

 

[Jon Skeet [C# MVP]]

I think only one handler can assign to one control's event? BTW, I don't
know much about C# yet, can you assign more than one handler to one
control's event?

Absolutely. You might want various different methods to validate a
keystroke, for instance.

 

[Jon Skeet [C# MVP]]

there is a way to obtain the handler's list for a specific event of an
object?

Not from outside the class. From inside the class, assuming you've
implemented the event with a delegate (which you do by default with the
event keyword) you can use Delegate.GetInvocationList.

 

[bpfa]

Thanks

Not from outside the class. From inside the class, assuming you've
implemented the event with a delegate (which you do by default with the
event keyword) you can use Delegate.GetInvocationList.