FormClosing event performed twice

[Stefanie Knapp]

Hi,

I've got a problem with a .NET 2.0 application: When I try to cancel
the FormClosing event of the main form of the program (e.Cancel =
true), this same event is performed a second time (now it can be
cancelled successfully). The first time the FormClosing-method is
called with CloseReason.UserClosing, second time with
CloseReason.ApplicationExitCall. There is no call of Application.Exit()
before the FormClosing method is performed.

The form is an MDI parent, and this happens only when the MdiChildren
list is empty.

void MainFrame_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show(this, "Do you really want to exit?", "Exit
program?",
MessageBoxButtons.YesNo, MessageBoxIcon.Question) !=
DialogResult.Yes)
{
e.Cancel = true;
return;
}
}

Why is the FormClosing event performed a second time with
CloseReason.ApplicationExitCall? Any suggestions?

Thanks in advance
Stefanie

 

[Stoitcho Goutsev \(100\)]

Stefanie,

I can't reproduce your problem. I think there is something in your code that
causes it.

Can you post a simple compilable code that exposes this strange behavior?

 

[Stefanie Knapp]

Thanks for your answer. We use some resources from Syncfusion in our
application, and while trying to create a simple code I found out that
this only seems to happen when a TabbedMDIManager object is attached to
the main form... So I'm at least a bit closer to the solution of the
problem (I hope).

 

[Manoj]

Hi Stefanie,

Could you please let me know the version of Syncfusion Essential Studio
you are using? We had similar issue # 1343 in TabbedMDI, which has been
fixed in the later releases of v.4.1.0.50.

http://www.syncfusion.com/support/issues/tools/Default.aspx?ToDo=view&questId=1343

Thanks for using Syncfusion products.

Best Regards,
Mano Johnson,
Essential Tools Support Engineer,
Syncfusion Inc,

 

[Stefanie Knapp]

Hi,

we already use version 4.1.0.50 of Syncfusion Essential Studio.
The problem with the closing event happens only when all Mdi children
are closed.

Best regards,
Stefanie

 

[Manoj]

Hi Stefanie,

Could you please create a Direct-Trac incident and get the latest
version of Essential Studio version which contains this fix?

Best Regards,
Mano Johnson,
Essential Tools Support Engineer,
Syncfusion Inc.