[Gtk-sharp-list] Events in Gtk#

Douglas A Wolfe Douglas A Wolfe <dougwolfejr@gmail.com>
Mon, 28 Mar 2005 16:24:11 -0500

Sorry, For the repeated message, but I wasn't a member before.

I am not sure if this is the place to ask, but I will anyway.

I am trying to create a project using gtk in c#.  I have tried
developing in Visual Studio and in SharpDevelop.   I have what seems
to be a simple problem, but I have not been able to solve it and I
have looked over the internet everywhere and not found a solution.

My problem is whenever I add an event and then try to call the event I
get an error.  For Instance, when I hit the close button using the
simple code found at the bottom of the message.  I get this error: "An
unhandled exception of type System.ArgumentNullException' occurred in
Additional information: Value cannot be null."

The program stops right after Application.Run().  and never follows
the event to  "delete_cb."  I have tried using other events including
a treeview.buttonpressevent and I have gotten the same error.  The
only event that I have found works for me is the button_clicked event.

Does anybody know how to fix this?  Thanks in advance.

namespace GTKProgram
       using Gtk;
       using Gdk;
       using GLib;
       using System;
       using GtkSharp;

       public class GtkStart

               public static void Main(string[] args)
                       Gtk.Window win = new Gtk.Window ("Menu Sample App");
                       win.DeleteEvent += new DeleteEventHandler (delete_cb);

               static void delete_cb (object o, DeleteEventArgs args)
                       //SignalArgs sa = (SignalArgs) args;
                       Application.Quit ();
                       //sa.RetVal = true;