/// <summary>
        /// 将所有被选中的功能权限的Id加入集合中
        /// </summary>
        /// <param name="nodes"></param>
        /// <param name="nodeList"></param>
        public void GetAllCheckedNodes(TreeNodeCollection nodes, List<string> nodeList)
        {
            foreach (TreeNode node in nodes)
            {
                if (node.Checked == true)
                {
                    nodeList.Add(node.Tag.ToString());
                }
                GetAllCheckedNodes(node.Nodes, nodeList);
            }
        }