Hi Friends,
I developed a plug-ins and put the button on the menu bar (Name "Assessment").
At the first run, I can click this button and work without problem.
But, after close it and I try to click it again, it crashes.
Do you have any suggestions on this? I suspect few things as follows
1. I use Install Shield to do the set up project and after that the problem occur.
2. I install MapWindowCF47RC-x86-Setup.exe and it seems my plug in folder was updated.
Here is the report after it crashes

System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'ClassAssignment'.
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Form.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at WeifenLuo.WinFormsUI.DockContentHandler.set_DockPanel(DockPanel value)
at WeifenLuo.WinFormsUI.DockContentHandler.Show(DockPanel dockPanel, DockState dockState)
at WeifenLuo.WinFormsUI.DockContent.Show(DockPanel dockPanel, DockState dockState)
at MapWindow.MapWindowForm.ToolStripButton2_Click(Object sender, EventArgs e) in C:\#maisak\MAPWINDOW\MapWindow\Forms\frmMain.vb:line 4572
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Thanks in advance
Sarawut

Hi Sarawut,

Can you post your code please?

What I suspect you are doing is something like this.


If(button = "MyButton")
MyDialog.show()
endif


Which will cause the error you are getting if the next time the user clicks the button MyDialog is disposed of (For example if they closed the form) Try this instead:

If(button = "MyButton")
If (MyDialog.IsDisposed = True OrElse MyDialog is nothing)
MyDialog = new DialogType()
endif
MyDialog.show()
endif

That is all is sudo code so you can't just copy and paste it but it should give you the general idea.

Brian