Close All Childrens From an Mdi Container?

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Hi All,

I have an MDI container with 1 MenuStrip

C#

New->Form1
     Form2
     Form3

How to close all child forms from an MDI container except the Last Opened Form.

In New->Form1 click I wrote the following code to show Form1:

C#

Form1 fc = new Form1();
fc.TopLevel = false;
fc.MdiParent = this;
fc.Parent = this.splitContainer1.Panel2;
fc.StartPosition = FormStartPosition.CenterParent;
fc.FormBorderStyle = FormBorderStyle.None;
fc.Location = new System.Drawing.Point(0, 70);
fc.ShowInTaskbar = false;
fc.BringToFront();
fc.Show();

Same for Form2 and Form3 clicks.

When I open any one of the menu item, I want to close the remaining two if they are open.

I wrote the following code but it doesn't work for me.

foreach(Form childForm in MdiChildren)
{
   childForm.Close();
}

Regards,
Pawan.

Posted 12-Jul-10 3:46am

Pawan Kiran

Updated 12-Jul-10 3:53am

Nuri Ismail

v2

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3 solutions

Solution 2

Hi Jason

U r code helps me alot to solve my issue and Thanks to u.

Regards,
Pawan.

Posted 13-Jul-10 18:09pm

Pawan Kiran

Updated 13-Jul-10 18:17pm

v2

Solution 3

Hi,
Could you please try by Calling Application.Exit or Simply END (Only in VB)

Posted 25-May-11 4:02am

Liju Sankar

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jasonalls · Accepted Answer · 2010-07-13T09:13:00

Hello Pawan,

There is a problem with your code in that as soon as you set the MDIParent, the fc immediately becomes an MDI child form. But as soon as you set Panel 2 as the parent, MDIParent is set to null and fc is no longer an MDI child.

MIDL

fc.MdiParent = this;
// At this point fc is an MDI child.
fc.Parent = this.splitContainer1.Panel2;
// At this point MdiParent is null, and fc is no longer an MDI child.

What you need to do is iterate through the forms in the controls collection for Panel2 and close each form as follows.

foreach (Form childForm in this.splitContainer1.Panel2.Controls)
{
  childForm.Close();
}
Form1 fc = new Form1(); 
fc.TopLevel = false; 
fc.Parent = this.splitContainer1.Panel2; 
fc.StartPosition = FormStartPosition.CenterParent; 
fc.FormBorderStyle = FormBorderStyle.None;
fc.BackColor = Color.Green;
fc.Location = new System.Drawing.Point(0, 70); 
fc.ShowInTaskbar = false; 
fc.BringToFront(); 
fc.Show();

I hope this helps you.

Jason.