Hi all,
Vb Newbie!
I Have an application i am creating for which when i click a clear button the form textboxes are cleared for the next entry. My problem is that i have put the following code into my text_changed text box validations and therefore when clearing the form the below code is generated. Is there a way to disable this when my form clear is fired or is there a better way of validating user input that will not be fired when i clear the form.
Private
Sub txtCommAnnSal_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtCommAnnSal.TextChanged ' Check the flag to prevent code re-entry. If flag = False Then ' Set the flag to True to prevent re-entry of the code below.flag =
True ' Determine if the text of the control is a number. If IsNumeric(txtCommAnnSal.Text) = False Then ' Display a message box and clear the contents if not a number.MessageBox.Show("The text is not a valid number. Please re-enter")
' Clear the contents of the text box to allow re-entry.txtCommAnnSal.Clear()
End If ' Reset the flag so other TextChanged events are processed correctly.flag =
False End If End Sub
I am using textbox.clear to clear the contents of my form for re-entry
any advice greatly appreciated.
clearing a form for re-entry
GypsyJazzMan
Your validation code in general needs improvement. You're going to show a textbox whenever a character is pressed
At the least, you should only show a message box if the textbox is not empty. A better way would be to handle the lostfocus event, and then provide a message if the box is empty, or not a number. Better yet would be to handle the keypress event and if Char.IsDigit and Char.IsControl both fail, set e.Handled to true so the user can only type digits to start with
If your format is specific ( such as being 4 digits long ) then the masked text box control is an even better option.
Studying
If you have three textboxes that need to force numerics -