Hello everyone,
I have an application that does not contain a form. It has a notifyicon only.
So, I have to run my app using Application.Run() and not Application.Run(FORM)
If my notifyIcon has a contextmenustrip I get an exception:
Unhandled Exception: System.NullReferenceException: Object reference
not set to an instance of an object at
System.Windows.Forms.ToolStripDropDown.OnHandleCreated
(System.EventArgs)
The line that raise the exception inside ToolStripDropDown.cs is (line 564)
XplatUI.SetOwner (this.Handle,
Application.MWFThread.Current.Context.MainForm.Handle);
I attached one example that generates the exception. Compile it with
-res:test.ico,test.Resources.test.ico (copy the test.ico from
somewhere), so it has an icon.
If you change the class Controller to inherit from the class Form and
call Application.Run(controller) it works just fine.... (but of
course, it shows a form!)
But I dont want to create a form... does anyone know how to fix this?
Does anyone have suggestions?
Thanks,
Alex
////////////////////////////////////////////////////////////////////////////////
// Controller
//
// Copyright (c) 2007 Alex A. dos Santos
//
// Permission to use, copy, modify, distribute and sell this software for any
// purpose is hereby granted without fee, provided that the above copyright
// notice appear in all copies and that both that copyright notice and this
// permission notice appear in supporting documentation.
//
//////////////////////////////////////////////////////////////////////////////////
using System;
using System.Collections;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Net;
using System.Text.RegularExpressions;
namespace AutoLyrix
{
public class Controller
{
private System.Windows.Forms.NotifyIcon trayIcon;
private System.Windows.Forms.ContextMenuStrip trayMenu;
[STAThread]
static void Main(string[] args)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//
new Controller(args);
Application.Run();
}
public Controller(string[] args)
{
this.InitializeComponents();
}
public void InitializeComponents()
{
System.Reflection.Assembly assem = GetType().Assembly;
//
// trayMenu
//
this.trayMenu = new ContextMenuStrip();
this.trayMenu.Items.Add(new ToolStripSeparator());
//this.trayMenu.Items.Add(createMenuItem("About", "appAbout"));
this.trayMenu.RenderMode =
System.Windows.Forms.ToolStripRenderMode.Professional;
this.trayMenu.ShowImageMargin = false;
//
// trayIcon
//
this.trayIcon = new System.Windows.Forms.NotifyIcon();
this.trayIcon.Text = "test";
this.trayIcon.Icon = new
Icon(assem.GetManifestResourceStream("test.Resources.test.ico"));
this.trayIcon.Visible = true;
this.trayIcon.ContextMenuStrip = this.trayMenu;
this.trayIcon.Click += new EventHandler(trayIcon_Click);
}
private void trayIcon_Click(object sender, EventArgs e)
{
}
}
}
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