[RESOLVED] [02/03] Using the Controls Collection of a groupbox?

Hi all, I am trying to uncheck the currently checked radiobutton in a groupbox with 6 radiobuttons. I have this:

VB Code:

Dim RB As RadioButton
        For Each RB In GroupBox4.Controls
            RB.Checked = False
        Next

I get "Specified cast is not valid" in line "For Each RB In GroupBox4.Controls". What am I doing wrong, the editor isn't showing any errors.

You can't cast every control as a RadioButton if not every control IS a RadioButton. You need to check the type and only if it is a RadioButton can you then cast it as such and set its Checked property:

VB Code:

For Each ctl As Control In GroupBox4.Controls
            If TypeOf ctl Is RadioButton Then
                DirectCast(ctl, RadioButton).Checked = False
            End If
        Next ctl

Quote:

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Originally Posted by jmcilhinney

if not every control IS a RadioButton.

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haha John.. you must be coding too much.. you are starting to write your sentences in VB syntax :bigyello:

Me.HasLife = False :(

Ahh, I thought I can filter the collection further by providing what controls I am interested in. Thanks again, jmcilhinney (You must spread some Reputation around before giving it to jmcilhinney again :wave: )