C# 实现WinForm窗口最小化到系统托盘代码

1、如果不想让程序在任务栏中显示，请把窗体的属性ShowInTaskbar设置为false;

2、如果想让程序启动时就最小化，请设置窗体的属性WindowState设置为Minimized。(Minimized
最小化，Normal正常启动，Maximized最大化)

3、拉一个NotifyIcon控件notifyIcon，为控件notifyIcon的属性Icon添加一个icon图标。

4、可以为NotifyIcon加一个ContextMenuStrip右键菜单menu_Notify。

5、本例子禁用了窗体最大化按钮。(设置窗体的属性MaximizeBox的属性为false)

6、主要代码：
#region
私有方法　处理窗体的　显示　隐藏　关闭(退出)
        private void ExitMainForm()
       
{
            if (MessageBox.Show("您确定要退出化验数据接收程序吗？", "确认退出",
MessageBoxButtons.OKCancel, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == DialogResult.OK)
           
{
                this.notifyIcon.Visible = false;
               
this.Close();
                this.Dispose();
               
Application.Exit();
            }
        }

        private void
HideMainForm()
        {
            this.Hide();
       
}

        private void ShowMainForm()
        {
           
this.Show();
            this.WindowState =
FormWindowState.Normal;
            this.Activate();
        }
       
#endregion#region 右键菜单处理，显示　隐藏　退出
        private void
menuItem_Show_Click(object sender, EventArgs e)
        {
           
ShowMainForm();
        }

        private void
menuItem_Hide_Click(object sender, EventArgs e)
        {
           
HideMainForm();
        }

        private void
menuItem_Exit_Click(object sender, EventArgs e)
        {
           
ExitMainForm();
        }
        #endregion#region
双击托盘上图标时，显示窗体
        private void notifyIcon_DoubleClick(object sender,
EventArgs e)
        {
            if (this.WindowState ==
FormWindowState.Normal)
            {
                this.WindowState =
FormWindowState.Minimized;
   
               
HideMainForm();
            }
            else if(this.WindowState ==
FormWindowState.Minimized)
            {
               
ShowMainForm();
            }
        }
       
#endregion

        #region 点最小化按钮时，最小化到托盘
        private void
frmMain_SizeChanged(object sender, EventArgs e)
        {
            if
(this.WindowState == FormWindowState.Minimized)
           
{
                HideMainForm();
            }
        }
       
#endregion

        #region 窗体关闭时最小化到托盘
        private void
frmMain_FormClosing(object sender, FormClosingEventArgs e)
       
{
            e.Cancel = true;

            HideMainForm();
       
}
        #endregion