VB.NET How to display a msgbox if no radiobuttons were checked?

Question

Im creating a Payment Method, but im unsure how to display a msgbox when none of the Radiobuttons are checked.

This is my current code.

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    If RadioButton1.Checked Then Paypal_Pay.Show()
    Me.Hide()

    If RadioButton2.Checked Then PayWave_Pay.Show()
    Me.Hide()

    If RadioButton3.Checked Then CreditCard_Pay.Show()
    Me.Hide()
End Sub

But im unsure how to implement the msgbox in when the user doesn't check any of the radiobuttons. Sidenote- If the User clicks the Button and doesn't check any of the button, it just crashes.. so im unsure how to fix that.

Answer 1

You can use If..ElseIf to test each RadioButton, and then have a final Else to display the MsgBox, eg:

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
  If RadioButton1.Checked Then
    Paypal_Pay.Show()
    Me.Hide()
  ElseIf RadioButton2.Checked Then
    PayWave_Pay.Show()
    Me.Hide()
  ElseIf RadioButton3.Checked Then
    CreditCard_Pay.Show()
    Me.Hide()
  Else
    MsgBox(...)
  End If
End Sub