unit Unit12;

interface

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

type
  TForm12 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    ADOQuery1: TADOQuery;
    Image1: TImage;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    procedure Button1Click(Sender: TObject);
  
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form12: TForm12;

implementation

uses Unit1;

{$R *.dfm}

procedure TForm12.Button1Click(Sender: TObject);
var username,password:string;
begin
username:=edit1.Text;
password:=edit2.Text;
adoquery1.Close;
adoquery1.SQL.Clear;
adoquery1.SQL.Add('select * from admin where 用戶名='''+edit1.Text+''' and 密碼='''+edit2.Text+'''');
adoquery1.Open;
if (edit1.Text='') or (edit2.Text='') then
showmessage('輸入的用戶名或密碼不能為空')
else if adoquery1.Recordset.RecordCount=0 then
begin
showmessage('用戶名或密碼輸入錯誤');
end
else begin
Form1.showmodal;
Form12.Close;
end;
end;
end.