Member Avatar for ariannas

Code the
keypress
event of the textboxes. Allow numbers, the backspace key,
and the decimal point. Only write the code once and use Handles.

Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress

    If e.KeyChar = ControlChars.Back Then
        MessageBox.Show("error")
        e.Handled = True
    End If

End Sub
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  • Latest Post Latest Post by Ancient Dragon
Member Avatar for tinstaafl

you can leverage some of the methods in the Char class for this:

    If Char.IsNumber(e.KeyChar) OrElse e.KeyChar = Chr(Keys.Back) OrElse e.KeyChar = "."c Then

    End If
Member Avatar for ariannas

hmmm when I type a number on the textbxo1 i cant :(

Member Avatar for Ancient Dragon

This is a duplicate of the same question in VB.NET. You should not create threads in multiple forums for the same question because it just confuses everyone.

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