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unit Unit1;//Á¬½ÓÊý¾Ý¿â£¬¼ÓÔØÓû§Õʺš£

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs,unit2,unit3,StdCtrls;

type
TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    ComboBox1: TComboBox;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
private
    { Private declarations }
public
    { Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
with datamodule2 do
begin
    adoquery1.Connection:=adoconnection1;
    adoquery1.SQL.Clear;
    adoquery1.SQL.Add('select * from login where user='''+trim(combobox1.Text)+''' and psw='''+trim(edit1.Text)+'''');
    adoquery1.Active:=true;
    if not adoquery1.Eof then


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