unit5.~pas

Delphi编写的基于Oracle的分布式数据库的演示程序

unit Unit5;

interface

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

type
  Tcheck = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Button1: TButton;
    Button2: TButton;
    Query1: TQuery;
    procedure Button1Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  check: Tcheck;

implementation

uses Unit1;

{$R *.dfm}

procedure Tcheck.Button1Click(Sender: TObject);
begin
query1.Close;
query1.SQL.Text:='select passwd from manager where userid='''+edit1.text+'''';
showmessage(query1.SQL.Text);
query1.Open;
if query1['passwd']=edit2.Text then
   check.modalresult:=mrok
else
   showmessage('口令不正确，不能进入系统');
end;


procedure Tcheck.FormShow(Sender: TObject);
begin
 edit1.Clear;
 edit2.Clear;
end;

procedure Tcheck.Button2Click(Sender: TObject);
begin
close;
end;

end.