unit3.~pas

可以显示数据库中图书的信息以及读者的信息

unit Unit3;

interface

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

type
  TForm3 = class(TForm)
    DBNavigator1: TDBNavigator;
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    DBGrid1: TDBGrid;
    ADOQuery1: TADOQuery;
    DataSource1: TDataSource;
    Button2: TButton;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Formclose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form3: TForm3;

implementation

uses Unit2;


{$R *.dfm}

procedure TForm3.Button2Click(Sender: TObject);
begin
  ADOQuery1.Close;
  ADOQuery1.SQL.Clear;
  ADOQuery1.SQL.Text:='SELECT * FROM 读者类型';
  ADOQuery1.open;
end;

procedure TForm3.Button1Click(Sender: TObject);
begin
  ADOQuery1.Close;
  ADOQuery1.SQL.Clear;
  ADOQuery1.SQL.Add('SELECT * FROM 读者类型 where 类型 like ''%'+ edit1.Text + '%''');
  ADOQuery1.open;
end;
procedure TForm3.Formclose(Sender: TObject; var Action: TCloseAction);
begin
   Form2.show;
   Form3.hide;
end;

end.