unit1.pas

Delphi7应用编程150例附书源码.rar

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ImgList, ComCtrls, StdCtrls, DB, DBTables;

type
  TForm1 = class(TForm)
    TreeView1: TTreeView;
    Button1: TButton;
    TreeView2: TTreeView;
    Table1: TTable;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
    MS: TMemoryStream;
begin
    MS:=TMemoryStream.Create;
    TreeView1.SaveToStream(MS);
    Table1.Edit;
    (Table1.FieldByName('Blob') as TBlobField).LoadFromStream(MS);
    Table1.Post;
    MS.free;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
    MS: TMemoryStream;
begin
    MS:=TMemoryStream.Create;
    (Table1.FieldByName('Blob') as TBlobField).SaveToStream(MS);
    MS.Position:=0;
    TreeView2.LoadFromStream(MS);
    MS.free;
end;

end.