[Mono-winforms-list] Strange exception in Winforms app

[Baltasar García Perez-Schofield]

	Hi, there,

	I'm using Mono 3.2.8 in Lubuntu 14.04, and I'm observing an odd behaviour which renders a WinForms app unusable. This application works perfectly in Windows, I mean, with the .NET stack, and worked perfectly in the previous version of Lubuntu (with an older version of Mono).

	http://baltasarq.info/dev/pgcal/

	The app has a DataGridView. The problem is that, the second time you try to write something in a cell, WinForms launches the following exception (below). After this exception, the second time you write in the datagridview cell, the exception is raised continuously, so you actually cannot use the app.

	Any hint?	
	Is this problem known?

	EDIT: Oh, well, bad news. Yep, the problem is "known" (though nobody seems to care). User djdjaa89 reported it in bugzilla on January 1st, 2013, and had no answer.

	http://bugzilla.xamarin.com/show_bug.cgi?id=9653

	I guess what the "answer" to this e.mail is going to be.

==
$ mono ../pgcal/pgcal/bin/Release/pgcal.exe 
System.ObjectDisposedException: The object was used after being disposed.
  at System.Windows.Forms.Control.CreateHandle () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.TextBoxBase.CreateHandle () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.CreateControl () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.SetVisibleCore (Boolean value) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.set_Visible (Boolean value) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:set_Visible (bool)
  at System.Windows.Forms.DataGridView.BeginEdit (Boolean selectAll) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.DataGridView.ProcessKeyEventArgs (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.ProcessKeyMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WmKeys (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.DataGridView.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000] in <filename unknown>:0 
System.ObjectDisposedException: The object was used after being disposed.
  at System.Windows.Forms.Control.CreateHandle () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.TextBoxBase.CreateHandle () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.get_Handle () [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:get_Handle ()
  at System.Windows.Forms.DataGridView.ProcessKeyEventArgs (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.ProcessKeyMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WmKeys (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.DataGridView.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr wParam, IntPtr lParam) [0x00000] in <filename unknown>:0
==

-- 
Baltasar (baltasarq at gmail.com  http://baltasarq.info/)