MDI window

khautinh · September 17th, 2003, 05:20 PM

I have a main form and it has a menu when I click on open form from the menu it open the form1.

Now when I open the form1 I want to disable the open form from the menu.

When I close the form I want to enable the open from from the menu again.

PLease help how can i refer the menu in the mdi form from the form1.
Hope this is clear question. Thanks for all helps

Ron Howerton · September 26th, 2003, 02:45 PM

I've created nothing but Web based applications in .NET so far, so I've not actually tried this. But in the VB6 days, it was quite simple. From Form1_Load issue this statement:

MainFormName.mnuOpenFormName.enabled = false

From Form1_Unload:

MainFormName.mnuOpenFormName.enabled = true

Of course, you will have to change the form and menu item names to reflect your names, assumign this even works.

If your users don't need to do anything on the Main Form at all while form1 is open, you could do it even more easily by openimg form1 as a modal form.

matryer · October 21st, 2003, 04:16 AM

I don't think that will work Ron! The forms are not seen as shared (static) variables and can't just be referred to in the way you did above.

You could handle the events of the form.

' our Form object
Private WithEvents Form1 As Form

' since we're activating the form, we can make the menu items
' inactive from here
Private Sub OpenFormMenuItem_Click( . . . ) Handles OpenFormMenuItem.Click
   Form1 = New Form1
   Form1.MDIParent = Me
   Form1.Show
   OpenFormMenuItem.Enabled = False
End Sub

' handle the event of the form closing
Private Sub Form1_Closed( . . . ) Handles Form1.Closed
    Form1 = Nothing
    OpenFormMenuItem.Enabled = True
End Sub

----------
NeoTech

awsdv · October 23rd, 2003, 01:52 AM

These codes are not working, it cannot disable the menu item :

Private Sub OpenFormMenuItem_Click( . . . ) Handles OpenFormMenuItem.Click
   Form1 = New Form1
   Form1.MDIParent = Me
   Form1.Show
   OpenFormMenuItem.Enabled = False
End Sub

risu · November 3rd, 2003, 04:46 PM

Rearrange the menu item code like this:

Code:

Private Sub OpenFormMenuItem_Click( . . . ) Handles OpenFormMenuItem.Click
   OpenFormMenuItem.Enabled = False
   Form1 = New Form1
   Form1.MDIParent = Me
   Form1.Show
End Sub

In the Main Form write a small sub as such:

Code:

Public Sub OpenFormItemEnable()
   OpenFormMenuItem.Enabled = True
End Sub

Then in the closing event of Form1 call

Code:

Me.MDIParent.OpenFormItemEnabled()

There are much better ways to do it then creating a one line sub routine but that should work.

What Ron said about the modal forms is a good idea as well.
just replace the .show with .showdialog

Thanks,
Risu