keypress event - asc value and key. mismatch

[Drstein99]

PLEASE POST REPLIES IN VB.NET SYNTAX ONLY

 

I'm using keypress event, to trigger validation:

 

Public Sub esKeyPressInteger(ByVal sender As Object, ByVal e As KeyPressEventArgs)

 

 

and the VALUE of keys.delete (46) IS the same ASCII value of the ascii code for "." (decimal point)

 

How do i figure out that the char entered is only numeric, and also allow a delete or arrow key? I'm using this and it's malfunctioning:

 

If (Char.IsNumber(e.KeyChar) Or Asc(e.KeyChar) = Keys.Delete Or Asc(e.KeyChar) = Keys.Back) AND ASC(E.KeyChar) <> KEYS.Decimal Then

e.Handled = False

Else

e.Handled = True

End If

[JABE]

Try this:

 

   Dim m_blnKeyHandled As Boolean
   Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
       m_blnKeyHandled = e.KeyCode = Keys.Decimal OrElse _
                         e.KeyCode = Keys.Back OrElse _
                         e.KeyCode = Keys.Delete OrElse _
                         Char.IsLetter(Convert.ToChar(e.KeyValue))
   End Sub

   Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
       e.Handled = m_blnKeyHandled
   End Sub

 

Btw, I hope you're aware that a NumericUpDown control exists, specifically designed to accept numeric input.

[ThePentiumGuy]

hey a quick question, whta's OrElse do?,

 

tahnks

 

in response to the first post,

 

If (e.keycode = keys.Back Or e.keycode = keys.Delete Then

'do the same for the numbers(ex: keys.1 though 9 i beleive) or maybe "Or Char.IsNumber(e.keycode)" would work

 

'here you'd type in code that executes when you push thoe keys

 

 

 

 

end if

[PlausiblyDamp]

Or else only evaluates both operands if the first is false - otherwise it knows if the first is true it doesn't matter what the second operand equates to.

[ThePentiumGuy]

ah i see.

thanks a lot ,

 

pent