PageFile Usage increasing on every form change

[chrispy102]

Hi all,

I have an MDI app developed using vis studio 2005.
The problem I have is that evey time I close a Child form and open another, the CPU PF Usage increments slighty. This happens every time you change child forms until you run out of memory upon which you get a System.OutOfMemoryException.

Is there something subtle I'm missing about dealing with opening/closing MDIChild forms?

I have made sure only 1 child is open at one time and that all child forms are disposed of before opening another:

Public Sub CloseForms()

Dim frm As Form
Dim Count As Integer
For Each frm In MDIParent1.MdiChildren
Count = Count + 1
frm.Dispose()
Next
frm = Nothing
Count = Nothing

End Sub

I also put in an extra sub to dispose of all controls on every child form when each closing:

Private Sub frmMain_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
frmMainOptions.Dispose()

Dim FormControl As Control
For Each FormObject In Me.Controls
FormControl.Dispose()
Next
End Sub

I also force a garbage collection on every child form change:
System.GC.Collect()

As far as I can think, nothing I have declared/programmed is increasing in size with every screen change.

I've run out of ideas!

[mzmishra]

Check this

http://www.thescripts.com/forum/thread362016.html

[chrispy102]

Thanks 4 the reply and link

I took the comments raised on board and if I understood it, I tried changing the child forms this way:

Public Sub NewForm(ByRef MyNewForm As String)

Dim frm As Form
Dim Count As Integer
For Each frm In MDIParent1.MdiChildren
Count = Count + 1
frm.Close()
frm.Dispose()
Next
frm = Nothing
Count = Nothing

Dim Child As New Form
Try
Select Case MyNewForm
Case "frmAlarm"
Child= New frmAlarm
Case "frmGuard"
Child= New frmGuard
Case "frmMain"
Child= New frmMain
End Select
Catch ex As Exception
Exit Sub
End Try

Child.MdiParent = MDIParent1

Try
Child.Show()
Child.Update()
Catch ex As Exception
End Try

System.GC.Collect()

End Sub

Still no dice, the memory still rises.

[Plater]

Please don't double post.
http://www.thescripts.com/forum/thread736851.html