MdiParent Issue

[dm_dal]

All,
I have a c# windows application that I'm working on. The main window
(frmMain) IsMdiContainer is set to true. I have a second form (frm2) that
is instantiated as a MdiChild form.

frm2 is instantiated like thus:

private void initChildForms()
{
Form myForm = new frm2();
myForm.MdiParent = this;
myForm.Show();
}

My issue is that within frm2, when I try to set

this.Height = this.MdiParent.ClientSize.Height;

I get a null exception (MdiParent is null). How else can I get the
MdiParents ClientSize.Height ?

 

[Andrew \(Infragistics\)]

You must be calling that too early. Try waiting for the ParentChanged event.

 

[Chris Botha]

Do you want the MDI child to fill the parent's client area? If so, then
after showing the child, thus after childForm.Show(), set the WindowState
property of the child to Maximized.

 

[Herfried K. Wagner [MVP]]

I have a c# windows application that I'm working on. The main window
(frmMain) IsMdiContainer is set to true. I have a second form (frm2) that
is instantiated as a MdiChild form.

frm2 is instantiated like thus:

private void initChildForms()
{
Form myForm = new frm2();
myForm.MdiParent = this;
myForm.Show();
}

My issue is that within frm2, when I try to set

this.Height = this.MdiParent.ClientSize.Height;

I get a null exception (MdiParent is null). How else can I get the
MdiParents ClientSize.Height ?

Where are you calling the code that gets the client size?

 

[dm_dal]

It's being called in the frm2 constructor, right after the call to
InitializeComponent()

I'm placing two custom controls on frm2 (the first is a custom panel with a
lable and combobox, it's Dock property is set to DockStyle.Top, the second
is a third-party control who's height is determined by the containers
ClientSize.Height). The issue is when I initialize the form, The third party
control fills the form height and the custom panel is overlaid on top of the
third party control. However, if I resize my form when it's running, the
third party control adjust it's size (as it should) and is no longer under
the panel control (this is correct behavior).

So, I figured if I could set frm2's height to samller than I want it
(design-time) then resize it during initization (run-time) then the that
would compensate for the incorrect sizing.

dmy

 

[Ying-Shen Yu[MSFT]]

Hi dmy,
You may try putting this statement ,
this.Height = this.MdiParent.ClientSize.Height;
in your On_Activate event handler of your MDI child form.
If you still have problem, please let me know.
Thanks!


Best regards,

Ying-Shen Yu [MSFT]
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security

This posting is provided "AS IS" with no warranties and confers no rights.
You should not reply this mail directly, "Online" should be removed before
sending, Thanks!

--------------------
| From: "dm_dal" <[email protected]>
| References: <[email protected]>
<[email protected]>
| Subject: Re: MdiParent Issue
| Date: Mon, 29 Sep 2003 08:07:32 -0500
| Lines: 49
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
| Message-ID: <#[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.windowsforms
| NNTP-Posting-Host: mail.ebellgroup.com 63.121.243.2
| Path: cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl
| Xref: cpmsftngxa06.phx.gbl
microsoft.public.dotnet.framework.windowsforms:53378
| X-Tomcat-NG: microsoft.public.dotnet.framework.windowsforms
|
| It's being called in the frm2 constructor, right after the call to
| InitializeComponent()
|
| I'm placing two custom controls on frm2 (the first is a custom panel with
a
| lable and combobox, it's Dock property is set to DockStyle.Top, the second
| is a third-party control who's height is determined by the containers
| ClientSize.Height). The issue is when I initialize the form, The third
party
| control fills the form height and the custom panel is overlaid on top of
the
| third party control. However, if I resize my form when it's running, the
| third party control adjust it's size (as it should) and is no longer under
| the panel control (this is correct behavior).
|
| So, I figured if I could set frm2's height to samller than I want it
| (design-time) then resize it during initization (run-time) then the that
| would compensate for the incorrect sizing.
|
| dmy
| | > "dm_dal" <[email protected]> scripsit:
| > > I have a c# windows application that I'm working on. The main window
| > > (frmMain) IsMdiContainer is set to true. I have a second form (frm2)
| that
| > > is instantiated as a MdiChild form.
| > >
| > > frm2 is instantiated like thus:
| > >
| > > private void initChildForms()
| > > {
| > > Form myForm = new frm2();
| > > myForm.MdiParent = this;
| > > myForm.Show();
| > > }
| > >
| > > My issue is that within frm2, when I try to set
| > >
| > > this.Height = this.MdiParent.ClientSize.Height;
| > >
| > > I get a null exception (MdiParent is null). How else can I get the
| > > MdiParents ClientSize.Height ?
| >
| > Where are you calling the code that gets the client size?
| >
| > --
| > Herfried K. Wagner
| > MVP · VB Classic, VB.NET
| > <http://www.mvps.org/dotnet>
|
|
|