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RadioButton Change validation

P: n/a
I have 2 radio buttons and want to perform some kind of validation before I
allow the checked state to move from one to another. I tried overriding the
validating callback but I noticed that it is called when loosing focus and
that is not good enough because I need to know when one radio button is
The only way I found is to create a class deriving from RadioButton and I
override the OnClick event. I have an event handler that you can register to
and can confirm of the click should be performed or not.

Isnt there any built in way to handle this. ?

public class ControlledRadioButton : RadioButton

public delegate bool ConfirmClick(EventArgs e);
public event ConfirmClick ConfirmClickEvent = null;
protected override void OnClick(EventArgs e)
if(ConfirmClickEvent == null || ConfirmClickEvent(e))

Sep 26 '06 #1
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