unit4.~pas

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unit Unit4;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, DBCtrls, DB, ADODB, Mask, ComCtrls;

type
  TForm4 = class(TForm)
    ADOConnection1: TADOConnection;
    ADOTable1: TADOTable;
    DataSource1: TDataSource;
    DBNavigator1: TDBNavigator;
    GroupBox3: TGroupBox;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit6: TDBEdit;
    DBMemo1: TDBMemo;
    DBComboBox1: TDBComboBox;
    DBComboBox2: TDBComboBox;
    DBEdit5: TDBEdit;
    StatusBar1: TStatusBar;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    procedure DataSource1DataChange(Sender: TObject; Field: TField);
    procedure FormCreate(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}

procedure TForm4.DataSource1DataChange(Sender: TObject; Field: TField);
var i:integer;
begin
    i:=adotable1.RecNo;
    statusbar1.Panels[0].Text:='第'+inttostr(i)+'条记录，总共'+inttostr(adotable1.RecordCount)+'条记录';
end;

procedure TForm4.FormCreate(Sender: TObject);
begin
try
 adoconnection1.Open;
 adotable1.Active:=true;
 except
     application.MessageBox('找不到数据库，引起该问题的原因是数据库文件可能被人为删除或改名','无法打开数据库',0);
     application.Terminate;
 end;
end;

procedure TForm4.FormClose(Sender: TObject; var Action: TCloseAction);
begin
action:=cafree;
end;

end.