unit5.~pas

小型图书管理系统,仅仅适用于小型院校的图书管理.

unit Unit5;

interface

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

type
  Tcheck = class(TForm)
    Image1: TImage;
    LabeledEdit1: TLabeledEdit;
    LabeledEdit2: TLabeledEdit;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    Query1: TQuery;
    procedure SpeedButton1Click(Sender: TObject);
    procedure SpeedButton2Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  check: Tcheck;

implementation

{$R *.dfm}

procedure Tcheck.SpeedButton1Click(Sender: TObject);
begin
query1.close;
query1.ParamByName('userid').Value:=labelededit1.Text;
query1.Open;
if query1.Fields[0].value=null then
begin
  showmessage('错误的用户名!');
  exit;
end;
if query1.Fields[0].value=labelededit2.Text then
  check.ModalResult :=mrok
  else
  begin
  showmessage('口令不正确');
  exit;
end;
end;

procedure Tcheck.SpeedButton2Click(Sender: TObject);
begin
check.ModalResult:=mrcancel;
end;

procedure Tcheck.FormShow(Sender: TObject);
begin
LabeledEdit1.Text:='';
labelededit2.Text:='';
end;

end.