关于树

[wyqwn]

procedure TQiuZuDjForm.InitTreeView(Tree: TTreeView; Tablename: string);
var
AQueryTree:TAdoquery; //Query Contrel
QueryStr:string; //Query String
MyNode,MyNodeA:TTreeNode;
//i:Integer;
begin
AQueryTree:=TADOQuery.Create(nil);
AQueryTree.Connection:=DM.ADOCon;
Tree.Items.Clear;
//check paremater
QueryStr:='select * from '+tablename;
AQueryTree.SQL.Text:=QueryStr;
AQueryTree.Open;
//estimate if empty
while not AQueryTree.Eof do
begin
MyNode:=Tree.Items.Add(nil,Trim(AQueryTree.fieldbyname('中山区').AsString));
Tree.Items.AddChild(MyNode,Trim(AQueryTree.fieldbyname('秀月街').AsString));
MyNodeA:=Tree.Items.AddChild(MyNode,'租金：'+Trim(AQueryTree.fieldbyname('租金').AsString));
AQueryTree.Next;
end;
AQueryTree.Free;
end;
这是我初始化树的，我想实现这样的结果怎么做？
中山区
秀月街
租金500
租金600
桃源街
租金400
租金300
沙河口区
XX街
租金400
租金400
XX接
租金400
请问怎么改呀？

[zdcnow]

你的数据库的结构？

参考：
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
//////////数据库结构： //////////
//////////department: name:部门名称，char //////////
////////// d_no:部门号，int //////////
//////////worker: name:员工姓名，char //////////
////////// w_no:员工号，int //////////
////////// d_no:部门号，int //////////
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ComCtrls, Db, ADODB;

type
TForm1 = class(TForm)
TreeView1: TTreeView;
Button1: TButton;
ADOQuery1: TADOQuery; //连接department
ADOQuery2: TADOQuery; //连接worker
Edit1: TEdit; //结点信息
procedure Button1Click(Sender: TObject);//生成树
procedure TreeView1Click(Sender: TObject);//显示结点信息
procedure FormClose(Sender: TObject; var Action: TCloseAction);//释放p_data
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
p_data:pstring;
implementation

{$R *.DFM}

//生成树
procedure TForm1.Button1Click(Sender: TObject);
var
fn,sn:ttreenode; //fn：部门结点 sn:员工结点
begin
treeview1.Items.BeginUpdate;
adoquery1.close;
adoquery1.sql.clear;
adoquery1.sql.add('select * from department');
adoquery1.open;
treeview1.Items.Clear;
new(p_data);
p_data^:='root';
fn:=treeview1.Items.AddObject(nil,'root',p_data);
while not adoquery1.Eof do
begin
with treeview1.Items do
begin
new(p_data);
p_data^:=adoquery1.fieldbyname('d_no').asstring;
sn:=treeview1.Items.AddChildobject(fn,adoquery1.fieldbyname('name').asstring,p_data);

adoquery2.close;
adoquery2.sql.Clear;
adoquery2.sql.add('select * from worker where d_no=:d_no');
adoquery2.Parameters.ParamByName('d_no').value:=p_data^;
adoquery2.open;
while not adoquery2.Eof do
begin
new(p_data);
p_data^:=adoquery2.fieldbyname('w_no').asstring;
treeview1.Items.addchildobject(sn,adoquery2.fieldbyname('name').asstring,p_data);
adoquery2.Next;
end;
end;
adoquery1.Next;
end;
adoquery1.Close;
adoquery2.close;
treeview1.Items.EndUpdate;
end;

//显示结点信息
procedure TForm1.TreeView1Click(Sender: TObject);
begin
if treeview1.Selected=nil then exit;

case treeview1.Selected.Level of
1:begin
edit1.text:='部门号：'+pstring(treeview1.selected.Data)^;
end;
2:begin
edit1.text:='工号：'+pstring(treeview1.selected.Data)^;
end;
end;
end;
//释放p_data
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
if p_data<> nil then Dispose(p_data);
end;

end.