C#搜索TreeView子节点,保留父节点的方法

private void selectNodeByName(string name)
{
  //重新生生成树,
 InitTvCatalog();
 //删除节点
 selectNode(tvCatalog.Nodes, name);
}
private void selectNode(TreeNodeCollection nodes, string name)
{
 bool del = true;
 for (int i = nodes.Count - 1; i >= 0; i--)
 {
  TreeNode node = nodes[i];
  del = true;
  if (node.Nodes.Count != 0)
  {
   selectNode(node.Nodes, name);
  }
  if (node.Text.StartsWith(name, StringComparison.OrdinalIgnoreCase))
  {
   del = false;
  }
  else
  {
   del = true;
  }
  if (del && node.Nodes.Count == 0)
  {
   node.Remove();
  }
 }
 tvCatalog.ExpandAll();
}

private void selectNodeByName(string name)
{
 //重新生生成树,
 method = new Common.PublicMethod();
 method.TreeViewLoad();
 //删除节点
 selectNode(RegimeSetting.Common.StaticVariables.treeView.Items, name);
 method = null;
}
private void selectNode(ItemCollection nodes, string name)
{
 bool del = true;
 for (int i = nodes.Count - 1; i >= 0; i--)
 {
  TreeViewItem node = nodes[i] as TreeViewItem;
  del = true;
  if (node.Items.Count != 0)
  {
   selectNode(node.Items, name);
  }
  if (node.Header.ToString().StartsWith(name, StringComparison.OrdinalIgnoreCase))
  {
   del = false;
  }
  else
  {
   del = true;
  }
  if (del && node.Items.Count == 0)
  {
   if ((node.Parent as TreeViewItem) != null)
    (node.Parent as TreeViewItem).Items.Remove(node);
   else
    (node.Parent as TreeView).Items.Remove(node);
  }
 }
 (RegimeSetting.Common.StaticVariables.treeView.Items[0] as TreeViewItem).IsExpanded = true;
}