动态生成右键菜单子菜单

        #region 动态生成右键菜单子菜单
        /// <summary>
        /// 绑定菜单
        /// </summary>
        /// <param name="tv">根据不同的tv生成右键菜单项</param>
        private void BindMenu(TreeView tv)
        {
            ctmsMenu.Items.Clear();//清空菜单项避免重负添加
            if (tv.Name == "tvQueuing")//排队车辆的tv那右键菜单就只有出站车辆，暂停车辆
            {
                ToolStripMenuItem menu0 = GetMenuItem("出站车辆");
                tv.ContextMenuStrip = ctmsMenu;
                menu0.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu0);//添加一项
                ToolStripMenuItem menu1 = GetMenuItem("暂停车辆");
                menu1.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu1);//添加一项
            }
            if (tv.Name == "tvDeparture")//出站车辆tv那右键菜单就只有排队车辆，暂停车辆
            {
                ToolStripMenuItem menu0 = GetMenuItem("排队车辆");
                tv.ContextMenuStrip = this.ctmsMenu;
                menu0.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu0);//添加一项
                ToolStripMenuItem menu1 = GetMenuItem("暂停车辆");
                menu1.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu1);//添加一项
            }
            if (tv.Name == "tvPause")//暂停车辆tv那右键菜单就只有出站车辆，排队车辆
            {
                ToolStripMenuItem menu0 = GetMenuItem("出站车辆");
                tv.ContextMenuStrip = this.ctmsMenu;
                menu0.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu0);//添加一项
                ToolStripMenuItem menu1 = GetMenuItem("排队车辆");
                menu1.Click += new EventHandler(toolStripMenuItem_Click);//添加事件
                ctmsMenu.Items.Add(menu1);//添加一项

            }
        }

        /// <summary>
        /// 菜单项事件响应
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToolStripMenuItem menu = sender as ToolStripMenuItem;
        }

        /// <summary>
        /// 生成菜单项
        /// </summary>
        /// <param name="txt"></param>
        /// <returns></returns>
        private ToolStripMenuItem GetMenuItem(string txt)
        {
            ToolStripMenuItem menuItem = new ToolStripMenuItem();
            menuItem.Text = txt;
            return menuItem;
        }
      

        //排队车辆选中事件
        private void tvQueuing_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                BindMenu(tvQueuing);
            }
        }

        private void tvDeparture_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                BindMenu(tvDeparture);
            }
        }

        private void tvPause_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                BindMenu(tvPause);
            }
        }
        #endregion