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.NET Forum / Languages / C# / July 2007

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Child Form maximizes automatically. Why?

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Doc John - 10 Jul 2007 18:25 GMT
Assuming I have several child Forms open (not maximized) in my MDI Form,
when I maximize any of them and then close it, all my other Forms
automatically maximize. How come?
Is there an easy solution for this?

Thanks.
VS2005 - Windows Forms
Peter Ritchie [C# MVP] - 10 Jul 2007 18:56 GMT
You're actually maximizing the container, not the individual child windows.  
So, when you maximize one MDI Child you maximze them all.

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Microsoft MVP, Visual Developer - Visual C#

> Assuming I have several child Forms open (not maximized) in my MDI Form,
> when I maximize any of them and then close it, all my other Forms
[quoted text clipped - 3 lines]
> Thanks.
> VS2005 - Windows Forms
Doc John - 10 Jul 2007 19:07 GMT
Thanks.

So I would have to manually resize all the other Forms when I close the Form
that was maximized?

> You're actually maximizing the container, not the individual child
> windows.
[quoted text clipped - 7 lines]
>> Thanks.
>> VS2005 - Windows Forms
Jesse Houwing - 10 Jul 2007 19:25 GMT
* Doc John wrote, On 10-7-2007 20:07:
> Thanks.
>
[quoted text clipped - 12 lines]
>>> Thanks.
>>> VS2005 - Windows Forms

I'm not sure if it would work, but have you tried un-maximizing the
window you're closing in the form's Closing Event, just before it
actually closes? That might do the trick (haven't tried though)...

Jesse
Peter Ritchie [C# MVP] - 10 Jul 2007 19:28 GMT
Well, you'd have to keep track of what was and wasn't maximized and depending
on the active MDI Child either restore or maximize it depending what state
the close window was in and what you want the next window's state to me.
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http://www.peterRitchie.com/blog/
Microsoft MVP, Visual Developer - Visual C#

> Thanks.
>
[quoted text clipped - 12 lines]
> >> Thanks.
> >> VS2005 - Windows Forms
Jeffrey Tan[MSFT] - 12 Jul 2007 08:19 GMT
Hi John,

This behavior is by design of MDI UI. This has been confirmed in the remark
section of the link below:
http://msdn2.microsoft.com/en-us/library/ms644917.aspx

"If an MDI client window receives any message that changes the activation
of its child windows while the currently active MDI child window is
maximized, the system restores the active child window and maximizes the
newly activated child window."

If you really do not like the behavior, a simple workaround is placing a
call to set the child form's WindowState to "FormWindowState.Normal" just
as Jesse stated:
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
   this.WindowState = FormWindowState.Normal;
}

Hope this helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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Jeffrey Tan[MSFT] - 17 Jul 2007 03:50 GMT
Hi John,

Have you reviewed our replies to you? How about this issue now? If you
still need any help or have any concern, please feel free to feedback,
thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
ications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://msdn.microsoft.com/subscriptions/support/default.aspx.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

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