Disable RadioButton on Form unless criteria is met

[mikeg71]

Hi All,

I am a little bit stuck on this and not sure how to handle it... I have a form with approx 20 radiobuttons, once I click any radiobutton, that will trigger creating a dynamic button on another form. Where I am stuck is, how do I keep a single radiobutton disabled if lets say any of the other 19 buttons have been clicked? For example:

RadioButton List Form1 -

RadioButton1 = APPLE
RadioButton2 = ORANGE
RadioButton3 = GRAPES
RadioButton4 = PEARS
RadioButton5 = EMPTY ORDER

Form2 Textbox -

TextBox1 = "Order Number"

Ok, so Form1 opens with selections, they choose APPLE, the button appears on Form2. Until TextBox1 changes on Form2, RadioButton5 (EMPTY ORDER) needs to remain disabled each time Form1 opens UNLESS RadioButton5 was the first and only selection. Meaning if I select Empty Order, I cannot select anything else until Order Number changes. If I select any Fruit, I cannot select Empty Order. Hopefully this comes across making sense.

[dday9]

I'm assuming that the parent of the RadioButtons is the Form in my example, if not just change the reference to the Form name to the actual parent.

What you can do is generate the CheckChanged event for each RadioButton and disable every RadioButton that is not the sender. For example:

Private Sub RadioButtons_CheckChanged(sender As Object, e As EventArgs) Handles RadioButton1.CheckChanged, RadioButton2.CheckChanged, RadioButton3.CheckChanged, etc.
    Dim checkedRadioButton As RadioButton = DirectCast(sender, RadioButton)
    For Each radiobutton As RadioButton In Controls.OfType(Of RadioButton)().Where(Function(rb) rb.Name <> checkedRadioButton.Name)
        radioButton.Enabled = False
    Next
End Sub

[mikeg71]

Thanks dday9... I am not quite sure how to use this code for what I want. Will this work only one time while the form is open?

[Shaggy Hiker]

Can't say the description does make complete sense, though it's close. Radiobuttons work as a group. Only one can be selected at a time. Your description makes a bit more sense for checkboxes rather than radiobuttons. For example, you said,

UNLESS RadioButton5 was the first and only selection

If RadioButton5 is not the first selection, then it will be unselected, and only one CAN be selected. So, that doesn't really make sense, to me, unless you have each radiobutton in some kind of container such that each acts independently of the rest, in which case you should be using checkboxes instead.

If all the radiobuttons are in a single group, then they don't need to do much of anything on the other form, because only one can be selected at a time, so you only need one button on the other form.

For that reason, I'm not really sure where you are going, but you appear to be using radiobuttons in an odd way.

[mikeg71]

Shaggy Hiker... you are correct, this is probably a very strange way to handle this. Right now I don't have any issue with the user selecting only one radiobutton as they are all in a group. At the moment, I am using this:

        If Form1.PictureBox1.Controls.OfType(Of Button).Count >= 1 Then
            Me.RBEmptyOrder.Enabled = False
            Exit Sub
        End If

All this is helping me for is IF when Form1 opens, it checks to see if any buttons have been created previously, if so then only that radiobutton is disabled meaning other selections have already been made. Now I need to go the opposite direction, IF RBEmptyOrder gets checked, then ALL others are locked unless the textbox in the other form has changed to another order. I get myself confused on this, so I hope I am getting this out with a little bit of sense.