winform中treeview中节点选中的技巧

        private void tvwMenu_AfterCheck(object sender, TreeViewEventArgs e)
        {
            if (e.Action == TreeViewAction.ByMouse)
            {
                SoftMenu menu = e.Node.Tag as SoftMenu;
                if (menu.IsLast == 2)
                {
                    if (e.Node.Checked)
                    {
                        e.Node.Parent.Checked = true;
                    }
                    else
                    {
                        int i = 0;
                        foreach (TreeNode n in e.Node.Parent.Nodes)
                        {
                            if (n.Checked)
                            {
                                i++;
                                break;
                            }
                        }
                        if (i == 0)
                        {
                            e.Node.Parent.Checked = false;
                        }
                    }
                }
                else
                {
                    SetFullNodesChecked(e.Node);
                }
            }
        }

        /// <summary>
        /// 选中节点 子节点全选或者全不选
        /// </summary>
        /// <param name="node"></param>
        private void SetFullNodesChecked(TreeNode node)
        {
            foreach (TreeNode n in node.Nodes)
            {
                n.Checked = node.Checked;
                if (n.Nodes.Count > 0)
                {
                    SetFullNodesChecked(n);
                }
            }
        }