"Mike {0A6FF490-CF84-4d78-BD85-FF011A0C31" wrote:

> I tried this with both Visual Studio 2005 and Visual Studio 2008, but
> I'm unable to reproduce this problem. I created a WinForms
> application with a combo box. I added an event handler to the "Leave"
> event (There is no "lostFocus" event). I have 3 items in my ComboBox
> to choose from. I select the 2nd item, then I click on my desktop.
> The event is not fired at all. I can only get the event to fire if I
> click on another control in the same application.
>
> Have you stepped through your event to make sure the event you think
> is firing is actually the event firing? Could it be the Deactivated
> event of the form?
>
> One work-around would be to have a flag to check for the event. For
> example:
>
> private bool IsComboBoxLeaving = false;
> private void comboBox1_Leave(object sender, EventArgs e)
> {
> if (!this.IsComboBoxLeaving)
> {
> this.IsComboBoxLeaving = true;
> //do your stuff...
> this.IsComboBoxLeaving = false;
> }
> }
>
> But I don't think this is your ultimate solution. First, make sure
> the event you think is firing actually IS firing. Then, once you
> narrowed down which event is firing, examine it's code to see if
> there's something it's doing that's triggering a re-focus of the
> control.
>
> Put some debugging code into your event... something like:
>
> private int MyLostFocusCount = 0;
> private void comboBox1_Leave(object sender, EventArgs e)
> {
> this.MyLostFocusCount++;
> this.Text = MyLostFocusCount.ToString();
> /* comment out the rest of your event handler code, to see
> if the above 2 lines execute repeatedly. */
> }
>
> Try to reproduce the problem. Does the title of the application show
> a never ending incrementing number? If not, then the error is later
> in your event handler. Uncomment small pieces of your code until
> you've found the offending piece.
>
> Hope this helps,
>
> --------------------------
> Owner/Operator of
> www.MichaelsAttic.com
>
>
>
> On Apr 21, 10:21 am, Arne Garvander
> <ArneGarvan...@discussions.microsoft.com> wrote:
> > 1. I make a selection in a combobox
> > 2. I click outside my window on the desktop
> > Result:
> > The Combobox lostFocus fires multiple times until my application blows up.
> >
> > How can I work around this problem?
> >
> > --
> > Arne Garvander
> > Certified Geek
> > Professional Data Dude
>