usermanage.pas

Delphi+SQL的学生信息管理系统

unit usermanage;

interface

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

type
  Tfrmadmin = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Button1: TButton;
    Button2: TButton;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Edit2KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure Edit1KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmadmin: Tfrmadmin;

implementation

uses user;



{$R *.dfm}

procedure Tfrmadmin.Button2Click(Sender: TObject);
begin
close;
end;
var i:integer;
procedure Tfrmadmin.Button1Click(Sender: TObject);
   begin
    if sametext(edit1.Text ,'admin') and sametext(edit2.Text,'administ') then
     begin
     frmuser.Show;
     frmadmin.Hide;
     edit1.Text:='';
     edit2.Text:='';
     end
   else
   begin
    i:=i+1;
    if i>=3 then
     begin
     showmessage('你是非法用户，确定自动退出登陆管理用户窗体');
     edit1.Text:='';
     edit2.Text:='';
     close;
     end
     else
     begin
     showmessage('你输入的用户名和密码不正确，请从新输入');
     edit1.SetFocus;
     end;
     end;
end;

procedure Tfrmadmin.FormCreate(Sender: TObject);
begin
i:=0;
end;

procedure Tfrmadmin.Edit2KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
if key=13 then
  Button1Click(Sender)
else if key=vk_up then
   edit1.SetFocus;
end;

procedure Tfrmadmin.Edit1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
if key=13 then
   edit2.SetFocus;
end;

end.