log.~pas

产品标签管理系统：delphi+sql实现了产品标签、包装箱麦的自动生成等功能

unit log;

interface

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

type
  Tuslog = class(TForm)
    Image1: TImage;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Label7: TLabel;
    Image2: TImage;
    Label8: TLabel;
    SpeedButton1: TSpeedButton;
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure Edit2KeyPress(Sender: TObject; var Key: Char);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  uslog: Tuslog;
  lexit: integer;
implementation

uses  Unit1, mainform;

{$R *.DFM}

procedure Tuslog.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if key=#13 then
begin
edit2.SetFocus ;
edit2.SelectAll ;
end;
end;

procedure Tuslog.Edit2KeyPress(Sender: TObject; var Key: Char);
begin
if key=#13 then
 begin
  main.table4.Active:=false;
main.table4.IndexFieldNames :='username' ;
main.table4.Active:=true;
  if (edit1.Text ='') or (edit2.Text = '') then
   begin
    showmessage('叫块