Validating event firing twice when Tab is pressed.
I am very new to .net but have but lots of years of vb 6 and before. Very simple form has a textbox and I have the following validating code:
Private Sub tbOrderNumber_Validating(s
If Not tbOrderNumber.Text Like "########" Then
e.Cancel = True
MessageBox.Show("Invalid order number, please enter a valid order number.")
End If
End Sub
I have stripped all other code out of solution, This code works as I would expect it to, if the mouse is used to move somewhere else, but if a Tab is pressed it fires this sub twice. Why?
Private Sub tbOrderNumber_Validating(s
If Not tbOrderNumber.Text Like "########" Then
e.Cancel = True
MessageBox.Show("Invalid order number, please enter a valid order number.")
End If
End Sub
I have stripped all other code out of solution, This code works as I would expect it to, if the mouse is used to move somewhere else, but if a Tab is pressed it fires this sub twice. Why?
ASKER
I would think that a tab being pressed on the key board would trigger a key press event, but I am not clear why that would trigger the validating event twice. I get that the order of events change based on if the mouse is used or the tab is used but I would think that it would only trigger the validating once not twice? Hmmmm.
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We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Or, perhaps it's something to do with the order of events detailed here.