unit1.pas

《Delphi 2005程序设计及其应用开发》源代码

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids;

type
  TForm1 = class(TForm)
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    Query1: TQuery;
    Memo1: TMemo;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
   try
    Query1.Close;
    Query1.SQL.Clear;
    Query1.SQL.Add(Memo1.Text);
    Query1.Open;
   except
      on edataBaseError do Query1.ExecSQL;
   end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
   memo1.Clear;
   Query1.Close;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
   Query1.Close;
   Close;
end;

end.