从指定节点的子孙节点中查找Text为nodeText的节点

　　　　　/// <summary>
        /// 从指定节点的子孙节点中查找Text为nodeText的节点
        /// </summary>
        /// <param name="nodeText">要查找的节点的Text值</param>
        /// <param name="kNode">查询kNode的所有子孙节点</param>
        /// <returns></returns>
        private TreeNode FindNode(string nodeText,TreeNode kNode) 
        {
                foreach (TreeNode node in kNode.Nodes)
                {
                    if (node.Text == nodeText)
                    {
                        return node;
                    }
                    else
                        if (node.Nodes.Count > 0)
                            return FindNode(nodeText, node);
                        else
                            continue;
                }
                return null;
        }