MDIChild calling one of it's Parent Form's Menu Items

[eramgarden]

Originally from http://www.xtremedotnettalk.net/showthread.php?t=77613

 

I did this:

 

In MainForm (parent form), when the form is first loaded :

mnuView.Enabled = false;

 

Also created a routine to enable the menus:

 

public void enableMenus()
	{
		mnuView.Enabled= true;
		
		
	}

 

 

In child form

frmMDIMain mainframe = new frmMDIMain();
mainframe.enableMenus();

 

I set debug. It DOES go thru that routine but still wont enable!!

Any ideas??

Edited January 18, 2005 by Iceplug

[PlausiblyDamp]

You need to refer to the current instance of the parent form - not create a new instance.

Read over some of the above posts as they tell you what you need to do.

[AlexCode]

I'm assuming that you want to enable/desable the menus from an MDI Child form...

In this case you can simply use the MDIParent property to get a pointer to the form. Tho, to use embeded method public void enableMenus() you need to cast the type... something like:

 

'Assume that:
'     - this code is runned on a child form called frmChild
'     - the parent MDI Form is called frmMain
'This can be placed wherever you need to enable the menus.

dim _frmMain as frmMain
_frmMain = me.MDIParent
_frmMain.enableMenus

 

or simply:

DirectCast(me.MDIParent,frmMain).enableMenus

 

Alex :p

[eramgarden]

Yeah, but still light bulb is dim..

 

If I do this in ChildForm, it works:

this.MdiParent.Menu.MenuItems[4].Enabled= true;

 

But I want to use the method mentioned above..

 

I am following the example...

In Childform ..I did this:

frmMDIMain frmMain = this.MdiParent;

 

But get an error. I do have all that frmchild.show like this:

private void menuOpenDB_Click(object sender, System.EventArgs e)
	{
		frmDatabaseOpen objDatabaseOpen = new frmDatabaseOpen();
		objDatabaseOpen.MdiParent= this;
		objDatabaseOpen.Show();
	}

 

but still no luck..found other examples but in VB and when I convert them, they dont work..

[AlexCode]

But get an error.

 

What error??

[eramgarden]

Oh, I GOT IT...

 

 

((frmMDIMain)this.MdiParent).enableMenus();

 

 

In child menu.

 

THANK YOU SO MUCH for your help!

[AlexCode]

:D worked?

 

Nice...

 

Alex :p