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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ComCtrls, dbcgrids, DB, ADODB, DBCtrls, ExtCtrls,
pngimage;
type
TForm1 = class(TForm)
ds1: TDataSource;
qry1: TADOQuery;
con1: TADOConnection;
dbctrl1: TDBCtrlGrid;
dbtxt1: TDBText;
btn1: TButton;
img1: TImage;
procedure FormCreate(Sender: TObject);
procedure btn1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
SetWindowLong(Self.Handle, GWL_EXSTYLE, GetWindowLong(Self.Handle, GWL_EXSTYLE) or WS_EX_COMPOSITED); //启用双缓冲
end;
procedure TForm1.btn1Click(Sender: TObject);
begin
with qry1 do
begin
Close;
SQL.Clear;
SQL.Add('select top 10 * from goods');
Open;
end;
end;