//快速初始化功能树
procedure InitTree;
var
  doc: IXMLDOMDocument;
  Node, ChildNode: IXMLDOMNode;
  NodeList: IXMLDOMNodeList;
  i, Index: Integer;
  id,mc,parentid,level: string; 
  List: TStringList;
  TreeNode: TTreeNode;
begin
  if not FileExists(applicationDir + 'Menu.xml') then
  begin
    MsgBox('请确认文件Menu.xml是否存在!');
    Exit;
  end;  
  cxTreeView.Items.BeginUpdate;
  try
    cxTreeView.Items.Clear;
    List := TStringList.Create;
    doc := CoDOMDocument.Create;
    try
      List.Sorted := True;

      doc.load(applicationDir + Menu.xml');

      NodeList := doc.selectNodes('CKTS/SC/item');
      for i := 0 to NodeList.Length - 1 do
      begin
        Node := NodeList.Item[i].Attributes.getNamedItem('id');
        if Node = nil then Break;
        id:= Node.text;

        Node := NodeList.Item[i].Attributes.getNamedItem('mc');
        if Node = nil then Break;
        mc:= Node.text;

        Node := NodeList.Item[i].Attributes.getNamedItem('parentid');
        if Node = nil then Break;
        parentid:= Node.text;

        //Node := NodeList.Item[i].Attributes.getNamedItem('level');
        //if Node = nil then Break;
        //level:= Node.text;

        if StrToInt(parentid) = 0 then { ParentID=0，顶层节点 }
          TreeNode := cxTreeView.Items.AddChild(nil, mc)
        else
        begin
          Index := List.IndexOf(parentid);
          TreeNode := cxTreeView.Items.AddChild(TTreeNode(List.Objects[Index]),  mc);
          TreeNode.ImageIndex:= 0;
        end;
        List.AddObject(id, TreeNode);
      end;
    finally
      FreeAndNil(List);
      doc := nil;
    end;
    cxTreeView.TopItem.Expand(True);
  finally
    cxTreeView.Items.EndUpdate;
  end;
end;

附 Menu.xml：

<?xml version="1.0" encoding="GBK"?>
<CKTS name="XXX业务清单" version="1.0">
 <SC>
  <item id='1' parentid='0' level="1" mc="aa"></item>
  <item id='2' parentid='1' level="2" mc="ba"></item>
  <item id='3' parentid='1' level="2" mc="bb"></item>
  <item id='4' parentid='1' level="2" mc="bc"></item>
  <item id='5' parentid='1' level="2" mc="bd"></item>
  <item id='6' parentid='1' level="2" mc="be"></item>
  <item id='7' parentid='2' level="3" mc="ca"></item>
  <item id='8' parentid='2' level="3" mc="cb"></item>
  <item id='9' parentid='2' level="3" mc="cc"></item>
  <item id='10' parentid='3' level="3" mc="cd"></item>
  <item id='11' parentid='3' level="3" mc="ce"></item>
  <item id='12' parentid='3' level="3" mc="cf"></item>
  <item id='13' parentid='3' level="3" mc="cg"></item>
  <item id='14' parentid='3' level="3" mc="ch"></item>
  <item id='15' parentid='4' level="3" mc="ci"></item>
  <item id='16' parentid='4' level="3" mc="cj"></item>
  <item id='17' parentid='4' level="3" mc="ck"></item>
  <item id='18' parentid='4' level="3" mc="cl"></item>
  <item id='19' parentid='5' level="3" mc="cm"></item>
  <item id='20' parentid='5' level="3" mc="cn"></item> 
        <item id='21' parentid='5' level="3" mc="co"></item>
  <item id='22' parentid='6' level="3" mc="cp"></item>
  <item id='23' parentid='6' level="3" mc="cq"></item>
  <item id='24' parentid='6' level="3" mc="cr"></item>
  <item id='25' parentid='6' level="3" mc="cs"></item>
 </SC>
</CKTS>