invalid thread after an InfoBox with contextMenu


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Michel Levy
Michel Levy
StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)StrataFrame User (437 reputation)
Group: StrataFrame Users
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Hi,

under certain condition, the main menu in my MDI form may call an infobox with a contextmenu .

If lnReccount > 5000 Then

With InfoBox.NotifyBoxSettings

.CardinalPosition = MessagingCardinalPosition.NorthWest

.SpecialEffect = InfoBoxSpecialEffect.Fade

.Opacity = 80

End With

InfoBox.NotifyBox(lcTitre, lcMessage, Me, Me.ThemedContextMenuStripInfoBox, MessagingCardinalPosition.NorthWest)

End If

Here's the code for one item

Private Sub CuvesToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CuvesToolStripMenuItem.Click, showCuvesTrue.Click

Dim frmCuves As New formcuves

frmCuves.MdiParent = Me

frmCuves.Show()

End Sub

And of course, I get an error because I'm not on the required thread:

InvalidOperationException
  Opération inter-threads non valide : le contrôle 'Ecran' a fait l'objet d'un accès à partir d'un thread autre que celui sur lequel il a été créé.

Source     : System.Windows.Forms

Stack Trace:
   à System.Windows.Forms.Control.get_Handle()
   à System.Windows.Forms.Control.get_CreateThreadId()
   à System.Windows.Forms.Form.set_MdiParentInternal(Form value)
   à System.Windows.Forms.Form.set_MdiParent(Form value)
   à bcuvtest1.Ecran.CuvesToolStripMenuItem_Click(Object sender, EventArgs e) dans C:\Documents and Settings\MICHEL\Mes documents\Visual Studio 2005\Projects\bcuvtest1\bcuvtest1\Ecran.vb:ligne 77
   à System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   à System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   à System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   à System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   à System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   à System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   à System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   à System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   à System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   à System.Windows.Forms.Control.WndProc(Message& m)
   à System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   à System.Windows.Forms.ToolStrip.WndProc(Message& m)
   à System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   à System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)
   à System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)
   à System.Windows.Forms.Nativewindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   à System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   à System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
   à System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   à System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   à System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
   à System.Windows.Forms.Form.ShowDialog()
   à MicroFour.StrataFrame.Messaging.InfoBox.NewAlertBoxThread()
   à System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   à System.Threading.ThreadHelper.ThreadStart()

How to ensure I'm in the "main" thread?

Thanks

GO

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