login.pas

完整的delphi书籍源代码,大家有空的时候自己慢慢看看

unit Login;

interface

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

type
  TLoginFrm = class(TForm)
    Edit1: TEdit;
    Label1: TLabel;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    procedure BitBtn2Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
  private
    { Private declarations }
  public   
    { Public declarations }
  end;

var
  LoginFrm: TLoginFrm;

implementation

uses Main;

{$R *.dfm}

procedure TLoginFrm.BitBtn2Click(Sender: TObject);
begin
  Close;
  MainFrm.Close;
end;

procedure TLoginFrm.BitBtn1Click(Sender: TObject);
var PswStr:string;
    pwdfile:textfile;
begin
  assignfile(pwdfile,'.\Psw.cfg');
  reset(pwdfile);
  readln(pwdfile,PswStr);
  closefile(pwdfile);
  if Edit1.Text=PswStr then
    begin
      close;
      MainFrm.Show;
      MainFrm.Enabled:=True;
    end
  else
     begin
       MessageDlg('对不起，您输入的密码错误！',mtInformation,[mbOk],0);
       Edit1.SetFocus;
     end;
end;

end.