unit3.~pas

商场管理 内容:通过商场入口和用户入口实现

unit Unit3;

interface

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

type
  Tfrm_product = class(TForm)
    Label1: TLabel;
    DataSource1: TDataSource;
    Table1: TTable;
    DBGrid1: TDBGrid;
    btn_add: TBitBtn;
    btn_ins: TBitBtn;
    btn_del: TBitBtn;
    BitBtn4: TBitBtn;
    Image1: TImage;
    procedure BitBtn4Click(Sender: TObject);
    procedure btn_addClick(Sender: TObject);
    procedure btn_insClick(Sender: TObject);
    procedure btn_delClick(Sender: TObject);
    procedure FormKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frm_product: Tfrm_product;

implementation

{$R *.dfm}

procedure Tfrm_product.BitBtn4Click(Sender: TObject);
begin
   self.Close ;
end;

procedure Tfrm_product.btn_addClick(Sender: TObject);
var
   id:integer;
begin
    with table1 do
     begin
      last;
      id:=fieldbyname('序号').AsInteger ;
      append;
      edit;
      fieldbyname('序号').AsInteger:=id+1;
      post;
      end;
end;

procedure Tfrm_product.btn_insClick(Sender: TObject);
begin
   table1.Insert ;
   table1.Post ;
end;

procedure Tfrm_product.btn_delClick(Sender: TObject);
begin

    if table1.RecordCount>0
    then
       begin
         if messagedlg('真的要删除吗？',mtconfirmation,[mbyes,mbno],0)=mryes  then
         table1.delete;
         end
       else
           messagedlg('无记录可删除！',mtwarning,[mbyes],0);

end;

procedure Tfrm_product.FormKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if (table1.recno=table1.recordcount) and (key=vk_down) then key:=0;
end;

end.