How do I disable all controls in ASP.NET page?

Question

I have multiple dropdownlist in a page and would like to disable all if user selects a checkbox which reads disable all. So far I have this code and it is not working. Any s

Answer 1

Here's a VB.NET version which also takes an optional parameter so it can be used for enabling the controls as well.

Private Sub SetControls(ByVal parentControl As Control, Optional ByVal enable As Boolean = False)

    For Each c As Control In parentControl.Controls
        If TypeOf (c) Is CheckBox Then
            CType(c, CheckBox).Enabled = enable
        ElseIf TypeOf (c) Is RadioButtonList Then
            CType(c, RadioButtonList).Enabled = enable
        End If
        SetControls(c)
    Next

End Sub