[WinForm]TreeView 检查节点文本是否存在

关键代码：

        #region 检查节点文本是否存在

        /// <summary>
        /// 检查节点文本是否存在
        /// </summary>
        /// <param name="tree">TreeView</param>
        /// <param name="key">节点文本</param>
        /// <returns>是否存在</returns>
        public static bool CheckNodeExist(this TreeView tree, string key)
        {
            bool _exists = false;
            for (int i = 0; i < tree.Nodes.Count; i++)
            {
                TreeNode _curNode = tree.Nodes[i];
                if (string.Compare(_curNode.Text, key, true) == 0)
                    _exists = true;
                else
                    _exists = CheckNodeExist(tree.Nodes[i], key);
            }
            return _exists;
        }

        private static bool CheckNodeExist(TreeNode node, string key)
        {
            for (int i = 0; i < node.Nodes.Count; i++)
            {
                TreeNode _node = node.Nodes[i];
                if (string.Compare(_node.Text.Trim(), key, true) == 0)
                {
                    return true;
                }
                if (_node.Nodes.Count > 0)
                {
                    CheckNodeExist(_node, key);
                }
            }
            return false;
        }

        #endregion 检查节点文本是否存在

希望有所帮助！
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