WinForm中实现最小化到系统托盘

有个叫NotifyIcon的控件

１、建个WinForm项目，其它操作略过。

２、拉个NotifyIcon控件，将属性Visable设置成False，在Text属性上随便填些文件。

３、实现Form的SizeChanged事件，代码如下：

if(this.WindowState == FormWindowState.Minimized)  //判断是否最小化
{
    this.ShowInTaskbar = false;  //不显示在系统任务栏
     notifyIcon.Visible = true;  //托盘图标可见
}

４、实现NotifyIcon控件的DoubleClick事件，代码如下：

if(this.WindowState == FormWindowState.Minimized)
{
    this.ShowInTaskbar = true;  //显示在系统任务栏
    this.WindowState = FormWindowState.Normal;  //还原窗体
     notifyIcon.Visible = false;  //托盘图标隐藏
}

例题：

private ContextMenu notifyiconMnu;

#region 最小化到任务栏
        /// <summary>
        /// 最小化到任务栏
        /// </summary>
        private void Initializenotifyicon()
        {
            //定义一个MenuItem数组，并把此数组同时赋值给ContextMenu对象 
            MenuItem[] mnuItms = new MenuItem[3];
            mnuItms[0] = new MenuItem();
            mnuItms[0].Text = "显示窗口";
            mnuItms[0].Click += new System.EventHandler(this.notifyIcon1_showfrom);

            mnuItms[1] = new MenuItem("-");

            mnuItms[2] = new MenuItem();
            mnuItms[2].Text = "退出系统";
            mnuItms[2].Click += new System.EventHandler(this.ExitSelect);
            mnuItms[2].DefaultItem = true;

            notifyiconMnu = new ContextMenu(mnuItms);
            notifyIcon1.ContextMenu = notifyiconMnu;
            //为托盘程序加入设定好的ContextMenu对象 
        }

        private void notifyIcon1_DoubleClick(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Show();
                this.ShowInTaskbar = true; 
                this.WindowState = FormWindowState.Normal; 
                notifyIcon1.Visible = false; 
            }
        }

        public void notifyIcon1_showfrom(object sender, System.EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Show();
                this.ShowInTaskbar = true;
                this.WindowState = FormWindowState.Normal;
                notifyIcon1.Visible = false;
            }
        }

        public void ExitSelect(object sender, System.EventArgs e)
        {
            //隐藏托盘程序中的图标 
            notifyIcon1.Visible = false;
            //关闭系统 
            this.Close();
            this.Dispose(true);
        }

        #endregion
private void Form_main_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized) //判断是否最小化
            {
                notifyIcon1.Visible = true;
                this.Hide();
                this.ShowInTaskbar = false;

                Initializenotifyicon();
            }
        }