这里我想加点语句，实现目录树新建后，自动选中新建的这个节点

/// <summary>
  /// 添加结点
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void newToolStripMenuItem_Click(object sender, EventArgs e)
  {
  TreeNode tn = new TreeNode();
  tn.Text = "新建文件夹";
  int i = Convert.ToInt32(treeView1.SelectedNode.Name);
  treeView1.SelectedNode.Nodes.Add(tn);
  string str1, str2;
  str1 = "declare @a integer,@b integer set @a =(select max(nd_id)+1 from tree) set @b = " + i + "";
  str2 = "insert into tree(nd_id,nd_parent,nd_text) values (@a,@b,'新建文件夹') ";
  connect(str1 + str2);

  treeView1.Nodes.Clear();
  gettreeview();
  这里我想加点语句，实现新建后，自动选中新建的这个节点.要怎样写法呀？请高手指点一下。 treeView1.LabelEdit = true;
  treeView1.SelectedNode.BeginEdit();
  }

http://www.cnblogs.com/virusswb/archive/2008/08/06/1261845.html