[Gambas-user] How to make Textbox only accept alphabetic and numbers characters

Hasan Merkit hasanmerkit at outlook.com
Mon May 10 13:24:23 CEST 2021

How i can make a textbox only accept alphabetic characters?

In VB.Net, i do this:

Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) _Handles txtName.KeyPress

    If Not (Asc(e.KeyChar) = 8) Then

        Dim allowedChars As String = "abcdefghijklmnopqrstuvwxyz0123456789"

        If Not allowedChars.Contains(e.KeyChar.ToString.ToLower) Then

            e.KeyChar = ChrW(0)

            e.Handled = True

        End If

    End If

End Su

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