treeview右键菜单

private void treeView_MouseDown(object sender, MouseEventArgs e)
        {
            Point point = new Point(e.X, e.Y);
            TreeNode node = this.treeView.GetNodeAt(point);
            if (node != null && e.Button == MouseButtons.Right)
            {
                treeView.SelectedNode = node;

                 ... ...//该部分操作省略

            }

        }

如上所示... ...