unit1.pas.~31~

《Delphi程序员成长攻略》-蒙祖强龚涛的源代码

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Button1: TButton;
    Table1: TTable;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit5: TDBEdit;
    DBEdit6: TDBEdit;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    SpeedButton3: TSpeedButton;
    SpeedButton4: TSpeedButton;
    SpeedButton5: TSpeedButton;
    Edit1: TEdit;
    Label7: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    procedure SpeedButton5Click(Sender: TObject);
    procedure SpeedButton4Click(Sender: TObject);
    procedure SpeedButton3Click(Sender: TObject);
    procedure SpeedButton2Click(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
    table1.First();
end;

procedure TForm1.SpeedButton2Click(Sender: TObject);
begin
    table1.Next();
    if table1.Eof then   ShowMessage('已经是最后一条记录，不能再后移！');

end;


procedure TForm1.SpeedButton3Click(Sender: TObject);
begin
    table1.Prior();
    if table1.Bof then   ShowMessage('已经是第一条记录，不能再前移！');


end;

procedure TForm1.SpeedButton4Click(Sender: TObject);
begin
    table1.Last();
end;

procedure TForm1.SpeedButton5Click(Sender: TObject);
begin
    table1.MoveBy(StrToInt(Edit1.Text))
end;

end.