Hi,

I have a MDI PARENT and several MDI CHILD.
and I put a panel with image inside MDI PARENT container..
but when I call my child form form the menu item, the panel always in front of them.

I already tried a lot ways,
1. mychildform.BringToFront();
2. before showing the childform, I set panel1.visible = false; at MDI PARENT form.
It works for showing the childform, but when I closed the childform, I set like this
//Child form script
Form1 frm = new Form(); //MDI PARENT Form
frm.PanelMaster.Visible=true;

//MDI PARENT script
public bool PanelMaster
{
set { this.panel1.visible=value; }
}

But after the child form closed, panel is not visible.

Please assist.

Thanks

I don't see how a this.tabPag member could ever be valid in a form. Anyhoo, use logic like this instead:

panel1.Visible = this.MdiChildren.Count == 0;

You can keep your panel visible at all times by docking it. I personally don't think much of the tabbed interface, it is completely unclear which tab belongs to which child window. Perhaps you should consider a real tabbed interface with a TabControl, showing UserControls on its tab pages. You can also embed a form in a tab page by setting its TopLevel property to false.

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Hans Passant.

Form1 frm = new Form(); //MDI PARENT Form
frm.PanelMaster.Visible=true;

This is new object of your parent form.

Try to change your existing object of MDI Parent form.

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Try to change your existing object of MDI Parent form.

I don't undertand. If I used 'Form1' instead of 'frm', I can't get method/property that I created before which in this case is property 'PanelMaster'.

Handle the child form's FormClosed event in the MDI form and set panel visibility there.

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http://blog.voidnish.com

How to achieve that? I really don't have any idea. Thanks.

How to achieve that? I really don't have any idea. Thanks.

Show the code where you create and show your child form.

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http://blog.voidnish.com

Ok, basically you'd have some code where you do this :

childForm = new ...
childForm.Show()

Just before you show it, add an event handler :

childForm.FormClosed += event-handler

and in this event-handler method, do :

panel1.Visible = ...

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http://blog.voidnish.com

Hi,
I stuck at here..

I declared an event handler like this, but still got some errors.

private void setVisible()
{
this.panel1.Visible = true;
}

childForm.FormClosed += new EventHandler(setVisible); //this is the error..
childForm.Show();

Is it the correct way?

Hi,
I stuck at here..

I declared an event handler like this, but still got some errors.

private void setVisible()
{
this.panel1.Visible = true;
}

childForm.FormClosed += new EventHandler(setVisible); //this is the error..
childForm.Show();

Is it the correct way?

The event handler signature does not match.

It needs to be

setVisible(Object sender, EventArgs e)
{
...
}

---

http://blog.voidnish.com

okay i got it worked with below code...

childForm.FormClosed+= new FormClosedEventHandler(FormLifeTimeEvent_Closed);
childForm.WindowState = FormWindowState.Maximized;
//Activate the MDI child form
childForm.Show();

private void FormLifeTimeEvent_Closed(object sender, FormClosedEventArgs e)
{
this.panel1.Visible = true;
}

basically it works. But I wish for every child form before closed will check something logic.

Okay, maybe let me explain some. Actually i want to adopt MDI TAB BROWSING form. So if I open a child form, it will look alike tab page. I follow this tutorial http://www.codeproject.com/KB/cs/MDITabBrowsing.aspx

Why I asked how to set panel visibility to true? because if only 1 form in tab browser, and then I close it so the panel should be visible. Otherwise if I got more than 1 form in tab browser (let's say 3 form), once I closed 1 (so remains 2 forms now) nothing happened for the event handler (or panel should be remain not visible).

Take a look this below code.
private void MDIChild_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
//Destroy the corresponding Tabpage when closing MDI child form
this.tabPag.Dispose();

//If no Tabpage left
if (!tabCtrl.HasChildren)
{
tabCtrl.Visible = false;
//I intend to put something here to make the panel visible = true
// so how to achieve it with the event handler as we did at above?
}
}

Hopefully, I explain clearly. :) thanks.

I don't see how a this.tabPag member could ever be valid in a form. Anyhoo, use logic like this instead:

panel1.Visible = this.MdiChildren.Count == 0;

You can keep your panel visible at all times by docking it. I personally don't think much of the tabbed interface, it is completely unclear which tab belongs to which child window. Perhaps you should consider a real tabbed interface with a TabControl, showing UserControls on its tab pages. You can also embed a form in a tab page by setting its TopLevel property to false.

---

Hans Passant.

Yes, I can keep my panel visible at all times by docking it in a parent form.
urm.. if I don't use tabbed interface for showing child forms in my application, maybe you have a good suggestion for me? :)
Because I ever worked with third party components which they provided tabbed interface forms, quite easy to use but it's not free.
They look neatly.

Thanks for your suggestions.

I thought I did give you a good suggestion. What's wrong with it?

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Hans Passant.

"Perhaps you should consider a real tabbed interface with a TabControl, showing UserControls on its tab pages. You can also embed a form in a tab page by setting its TopLevel property to false."

Did you mean above statement?

Hi qiux,

Yes, what you mentioned is nobugz's suggestions. He suggest two methods:
1. Add a TabControl to the parent form. Change each child form to a UserControl. Add a TabPage which contains the UserControl to the TabControl.
2. Add a child form to each TabPage and set it TopLevel property to false.

Let me know if this helps.
Aland Li

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