[mono-vb] Running VB-Applications compiled with VB.NET (Express Edition) causes many crashes!

Klaus Siebke ksiebke at web.de
Tue May 12 03:31:06 EDT 2009


Hi Hans,

I started with Mono VB about 2 months ago and I had/have the same problems.
Mono VB is still in a Beta state and I hope that somedays a debugger will be
added ...

In the meantime I use console messages like
console.writeline ("Key="+keycode)
I guess, you use this technique as well.

For me the reason for your error messages seems to be a missing mouse event
handler.

Best regards,
Klaus



Easy_Rider9999 wrote:
> 
> How can I get the line of code with the Error. I have made a version of my
> program for Mono, but I have many crashes, but I often don't find the
> crashes, because there is no debug information in the Mono-Error Message
> (I started with option --debug!).
> 
> Regards 
> 
> Hans
> 
> Here is my latest Error Message:
> 
> frmMain.initTreeview oldkeyensurevisible
> frmMain.tvMed_AfterExpand Start
> frmMain.tvMed_AfterExpand Expand Data
> Source=G:\Repetit.Net.T.SQLITE\bin\Datenba
> nk\RepLite.sqlite;Version=3;
> Init Treeview lasted: 0,150000000001455 Seconds!
> frmMain.tvMed_BeforeSelect Start
> frmMain.Form_Activate Start
> frmSymptome AutoSelect InitTreeview frmMain BySQL finished
> frmSymptome AutoSelect finished
> frmSymptome.tvSympt_AfterCheck Finished
> System.NullReferenceException: Object reference not set to an instance of
> an obj
> ect
>   at System.Windows.Forms.TreeNode.set_Checked (Boolean value) [0x00066]
> in C:\c
> ygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.Forms\System.
> Windows.Forms\TreeNode.cs:319
>   at (wrapper remoting-invoke-with-check)
> System.Windows.Forms.TreeNode:set_Chec
> ked (bool)
>   at System.Windows.Forms.TreeView.MouseDownHandler (System.Object sender,
> Syste
> m.Windows.Forms.MouseEventArgs e) [0x0009a] in
> C:\cygwin\tmp\monobuild\build\BUI
> LD\mono-2.4\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TreeView.cs:210
> 1
>   at (wrapper delegate-invoke)
> System.Windows.Forms.MouseEventHandler:invoke_voi
> d__this___object_MouseEventArgs
> (object,System.Windows.Forms.MouseEventArgs)
>   at System.Windows.Forms.Control.OnMouseDown
> (System.Windows.Forms.MouseEventAr
> gs e) [0x0001c] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Manage
> d.Windows.Forms\System.Windows.Forms\Control.cs:6354
>   at System.Windows.Forms.Control.WmLButtonDown
> (System.Windows.Forms.Message& m
> ) [0x0004f] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Wi
> ndows.Forms\System.Windows.Forms\Control.cs:5620
>   at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message&
> m) [0x0
> 0184] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.
> Forms\System.Windows.Forms\Control.cs:5337
>   at System.Windows.Forms.TreeView.WndProc (System.Windows.Forms.Message&
> m) [0x
> 0006b] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows
> .Forms\System.Windows.Forms\TreeView.cs:1198
>   at System.Windows.Forms.Control+ControlWindowTarget.OnMessage
> (System.Windows.
> Forms.Message& m) [0x00000] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\
> class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:234
>   at System.Windows.Forms.Control+ControlNativeWindow.WndProc
> (System.Windows.Fo
> rms.Message& m) [0x00000] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\cl
> ass\Managed.Windows.Forms\System.Windows.Forms\Control.cs:215
>   at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg,
> IntPtr wPa
> ram, IntPtr lParam) [0x00085] in
> C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mc
> s\class\Managed.Windows.Forms\System.Windows.Forms\NativeWindow.cs:242
> frmMain.Form_Activate Start
> 

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