Closing Event in MDI Child Forms

[Geoff Olding]

In VB.Net, What events (if any), does an MDI child form
get when the application closes, which I can use to cancel
the close?
I am relying on the Closing event, which fires when the
form itself closes, however this doesn't fire when the
application closes. I can't find any alternative.

[Armin Zingler]

Re: Closing Event in MDI Child Forms

"Geoff Olding" <Geoff.Olding@C ityComputers.co .uk> schrieb[color=blue]
> In VB.Net, What events (if any), does an MDI child form
> get when the application closes, which I can use to cancel
> the close?
> I am relying on the Closing event, which fires when the
> form itself closes, however this doesn't fire when the
> application closes. I can't find any alternative.[/color]

It does fire when the application closes - unless you kill your app the hard
way by using "End" or "Application.Ex it".


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Armin

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[Geoff Olding]

Re: Closing Event in MDI Child Forms


I don't get this result, I cannot get the event to fire whichever way I
close down the application


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[Herfried K. Wagner [MVP]]

Re: Closing Event in MDI Child Forms

* Geoff Olding <geoff.olding@c itycomputers.co .uk> scripsit:[color=blue]
> I don't get this result, I cannot get the event to fire whichever way I
> close down the application[/color]

Maybe you want to "subscribe" to the 'MdiParent''s 'Closing' event using
'AddHandler'/'RemoveHandler' .

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

[Armin Zingler]

Re: Closing Event in MDI Child Forms

"Geoff Olding" <geoff.olding@c itycomputers.co .uk> schrieb[color=blue]
>
> I don't get this result, I cannot get the event to fire whichever way
> I close down the application[/color]

_How_ do you close the application? Is there an End statement or
Application.Exi t anywhere? What if you set a breakpoint in the MDI
container's closing and/or closed events? Are they hit? What does the
callstack say when they are?

Can you reproduce it in a new project?


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Armin

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[Geoff Olding]

Re: Closing Event in MDI Child Forms

In response to your questions:

The application is closed in two ways: - the user can either close down
the MDI form from the control box, or use an "Exit" menu item, which
just does the following:
Me.Close

The application stops on breakpoints in the Closing and Closed Events
(in th elater case, provided I temporarily remove some code I have on
the MDI form's "onClosed" event)
The Callstack on "Closing" is as follows:[color=blue]
> Polygonal.exe!P olygonal.frmMdi .frmMdi_Closing (Object sender =[/color]
{Polygonal.frmM di}, System.Componen tModel.CancelEv entArgs e =
{System.Compone ntModel.CancelE ventArgs}) Line 1450 Basic
[<Non-user Code>]
Polygonal.exe!P olygonal.basGlo bal.Main() Line 39 + 0xb bytes Basic

The problem can be reproduced in a new project - I have created a simple
project with an MDI form and an MDI child form and get the same problem

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[Geoff Olding]

Re: Closing Event in MDI Child Forms

Thanks - this has done the trick



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[Armin Zingler]

Re: Closing Event in MDI Child Forms

"Geoff Olding" <geoff.olding@c itycomputers.co .uk> schrieb[color=blue]
> Thanks - this has done the trick[/color]

I don't understand this. You wrote:

"I am relying on the Closing event, which fires when the
form itself closes, however this doesn't fire when the
application closes."

Now the Closing event does fire?


--
Armin

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