Trapping Non Numeric Key

[martialdc]

Im trying to trap non numeric key in TextBox but why this code don't Work?
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar < Chr(48) And e.KeyChar > Chr(57) Or e.KeyChar <> Chr(8) Then
e.Handled = True
End If
End Sub

[Athley]

Try this....

If Char.IsNumber(e.KeyChar) Then

or

If Not (Char.IsNumber(e.KeyChar)) AndAlso Strings.Asc(e.KeyChar) <> 8 Then

if it was the other way around......

[Lunatic3]

If you want to respond only to numerics and back space then your code must be something like this if you want to keep your won format:
you should change the first AND with OR and the OR with AND


If (e.KeyChar < Chr(48) Or e.KeyChar > Chr(57)) And (e.KeyChar <> Chr(8)) Then

[MrPolite]

sorry if I'm reposting anything
this works well for me:

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
        Dim KeyASCII As Integer = Asc(e.KeyChar)
        Dim BACK_SPACE As Integer = 8
 
        If KeyASCII <> BACK_SPACE AndAlso _
           KeyASCII < 48 OrElse KeyASCII > 57 Then
            ' Cancel the entered key, not a valid key
            e.Handled = True
        End If
    End Sub

btw I made my own textbox that accepts numbers only muhuhuhahahaha