装载数据时可以将key字段放入ttreenode的data中，下面的程序实现找到相应的分支，
由data可以定位数库中的记录
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
TreeView1: TTreeView;
Edit1: TEdit;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
item:integer;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
i:integer;
begin
if treeview1.Items.Count>0 then
begin
if item<>0 then
item:=item+1;
for i:=item to treeview1.Items.Count-1 do
begin
if pos(edit1.Text,treeview1.Items.Item.Text)<>0 then
begin
treeview1.Selected:=treeview1.Items.Item;
treeview1.Items.Item.Expanded:=true;
item:=i;
break;
end;
end;
end;
if i>=treeview1.Items.Count then
begin
treeview1.Selected:=nil;
item:=0;
end;
treeview1.SetFocus;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
item:=0;
end;
end.
