C# treeview右键菜单 设置技巧

//在NodeMouseClick事件中 再将cms设定成treeview的cms. 这样点空,不会出现右键菜单.      
         //右键菜单
       private void tv_Roots_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Button != MouseButtons.Right) return;
            if (e.Node.Parent == null || e.Node == null) return;
            tv_Roots.SelectedNode = e.Node;
            cmsRouts.Show(tv_Roots, e.X, e.Y);
        }

//不同节点对应不同右键菜单的实现

   用1个cms. 右键点击树节点时，根据节点类型生成cms的MenuItem项及点击事件

  private void tvOneRoot_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Button != MouseButtons.Right) return;
            if (e.Node == null) return; //无节点
            if (e.Node.Level == 0) return;
            int nodeType = GetNodeTypeByGuid(e.Node.Name);
            tvOneRoot.SelectedNode = e.Node;
            InitcmsOneRout(nodeType);
            cmsOneRout.Show(tvOneRoot, e.X, e.Y);
        }

        /// <summary>
        /// 初始化cmsOneRoot 从nodetype
        /// </summary>
        /// <param name="nodetype"></param>
        private void InitcmsOneRout(int nodetype)
        {
            cmsOneRout = new ContextMenuStrip();
            if (nodetype == -1)
            {
                ToolStripMenuItem tmiEditRoutStation = new ToolStripMenuItem("编辑飞行站点");
                tmiEditRoutStation.Click += new EventHandler(tmiEditRoutStation_Click);
                cmsOneRout.Items.Add(tmiEditRoutStation);
                ToolStripMenuItem tmiMoveRouteStation = new ToolStripMenuItem("更改位置");
                tmiMoveRouteStation.Click += new EventHandler(tmiMoveRouteStation_Click);
                cmsOneRout.Items.Add(tmiMoveRouteStation);
                ToolStripMenuItem tmiDeleRouteStation = new ToolStripMenuItem("删除飞行站点");
                tmiDeleRouteStation.Click += new EventHandler(tmiDeleRouteStation_Click);
                cmsOneRout.Items.Add(tmiDeleRouteStation);
            }
            else if (nodetype == 0)
            {
                ToolStripMenuItem tmiEditRout = new ToolStripMenuItem("编辑飞行段属性");
                tmiEditRout.Click += new EventHandler(tmiEditRout_Click);
                cmsOneRout.Items.Add(tmiEditRout);
                ToolStripMenuItem tmiDeleteRout = new ToolStripMenuItem("删除飞行段");
                tmiDeleteRout.Click += new EventHandler(tmiDeleteRout_Click);
                cmsOneRout.Items.Add(tmiDeleteRout);
            }
            else if (nodetype == 1)
            {
 
            }
            else if (nodetype == 2)
            {

            }
            else
            {
 
            }

        }

void tmiEditRout_Click(object sender, EventArgs e)//编辑飞行段
        {
            string routId = tvOneRoot.SelectedNode.Name;
            RouteParameter rp = GetRouteParaByGuid(routId);
            FrmPointProperty frm = new FrmPointProperty(rp, 0, 1);
            frm.OnRoutInfoUpdated += new FrmPointProperty.DelegateRouteInfoUpdated(frm_OnRoutInfoUpdated);
            frm.ShowDialog();
        }