u_classmain.pas

河南师范大学餐饮进销存软件,只要控制库存的数据。

unit u_ClassMain;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DB, ADODB, StdCtrls, Buttons, Grids, DBGrids, ExtCtrls,u_ClassAdd,
  u_ClassEdit;

type
  TfrmClassMain = class(TForm)
    Panel1: TPanel;
    DBGrid1: TDBGrid;
    btnOK: TBitBtn;
    btnEdit: TBitBtn;
    btnDelete: TBitBtn;
    btnClose: TBitBtn;
    qry: TADOQuery;
    DataSource1: TDataSource;
    procedure btnCloseClick(Sender: TObject);
    procedure btnOKClick(Sender: TObject);
    procedure btnEditClick(Sender: TObject);
    procedure btnDeleteClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure DBGrid1DblClick(Sender: TObject);
  private
    { Private declarations }
  public
    BmkFlag : TBookmark;
    { Public declarations }
  end;

var
  frmClassMain: TfrmClassMain;

implementation

{$R *.dfm}

procedure TfrmClassMain.btnCloseClick(Sender: TObject);
begin
  Close;
end;

procedure TfrmClassMain.btnOKClick(Sender: TObject);
begin
  frmClassAdd.ShowModal;
end;

procedure TfrmClassMain.btnEditClick(Sender: TObject);
begin
  BmkFlag := qry.GetBookmark;
  frmClassEdit.ShowModal;
end;

procedure TfrmClassMain.btnDeleteClick(Sender: TObject);
begin
  qry.Delete;
  if qry.IsEmpty then
  begin
    btnEdit.Enabled   := False;
    btnDelete.Enabled := False;
  end;
end;

procedure TfrmClassMain.FormShow(Sender: TObject);
begin
  qry.Active := True;
  if qry.IsEmpty then
  begin
    btnEdit.Enabled   := False;
    btnDelete.Enabled := False;
  end;
end;

procedure TfrmClassMain.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
  Action := CaFree ;
end;

procedure TfrmClassMain.DBGrid1DblClick(Sender: TObject);
begin
  if qry.IsEmpty then
  begin
    Application.MessageBox('记录为空','警告',mb_ok);
    Exit;
  end
  else
  btnEdit.Click;
end;

end.