Radiobutton logic ? How to implement auto unchecking others in panel

[Sagaert Johan]

Hi

I am creating a custom control and i want it to behave like a radiobutton :

If multiple radiobuttons are on a panel clicking one unchecks the others.
How is this achieved ?

I want to do the same with my own control when i put multple of them on a
panel or groupbox.

Johan

 

[Samuel R. Neff]

In a web form or win form? Makes a big difference in the answer...

Sam

 

[Sagaert Johan]

Win form

In a web form or win form? Makes a big difference in the answer...

Sam



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[Bobbo]

I am creating a custom control and i want it to behave like a radiobutton :

If multiple radiobuttons are on a panel clicking one unchecks the others.
How is this achieved ?

Try simply inheriting from RadioButton. I've just tried that now, and
it seems to work fine. If I place two of my new controls on the form,
then only one can be selected at once.

 

[Samuel R. Neff]

That's good, winforms is easier for this question.

When you click a winform radiobutton (or set it's checked property to
true) it loops through all sibling controls (i.e., children of it's
parent) and for every radio button it finds that isn't itself it
unchecks it. Pretty straightforward. You can use Reflector to look
at RadioButton.PerformAutoUpdates for exactly what it does.

HTH,

Sam