unit7.pas

学生信息管理系统

unit Unit7;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    DBGrid2: TDBGrid;
    Panel1: TPanel;
    procedure Button1Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses Unit1;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
    dm.ADOQuery2.Close ;
    dm.ADOQuery2.SQL.Clear ;
    dm.ADOQuery2.SQL.Add('select * from dangan');
    dm.ADOQuery2.SQL.Add('where 姓名 like'''+edit1.text+'%''');
    dm.ADOQuery2.Open ;
    panel1.Caption:='总共找到 '+inttostr(dm.ADOQuery2.RecordCount)+' 条记录';
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
    action:=cafree;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
    dm.ADOConnection1.Close;
    try
        dm.ADOConnection1.Open;
    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;

end.