Validation help with text box

[Steven Low]

Hi guys
The below validation only allows text no number input but i cant go back. What would i need to code to allow this


Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar.IsLetter(e.KeyChar) = False Then
e.Handled = True
End If
End Sub

 

[SDavied]

Try this:

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress 
       If Not e.KeyChar.IsLetter(e.KeyChar) AndAlso  e.KeyChar <> ControlChars.Back
              e.Handled = True 
       End If 
     End Sub

 

[JuggaloBrotha]

or:

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress 
  If e.KeyChar.IsLetter(e.KeyChar) = False AndAlso  Asc(e.KeyChar) <> Keys.Back
         e.Handled = True 
  End If 
End Sub

 

[Steven Low]

Thanks guys

Validation works

 

[Inhua]

SDavied or JuggaloBrotha,
What is the use of AndAlso? What is the difference with And?