unitcomcz.pas

一个音像租赁店铺的管理软件,可以维护影片库信息和会员信息,及日常业务的实现(出租/归还).这是我学delphi整一个月的纪念品,有些简单,不过我还是希望和大家分享一下我的成长历程.

unit UnitComCZ;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Mask, DBCtrls;

type
  TfrmComCZ = class(TForm)
    Label2: TLabel;
    DBEdit2: TDBEdit;
    Label3: TLabel;
    DBEdit3: TDBEdit;
    GroupBox1: TGroupBox;
    DBEdit4: TDBEdit;
    DBEdit1: TDBEdit;
    ComboBox1: TComboBox;
    Button1: TButton;
    DBEdit6: TDBEdit;
    DBEdit7: TDBEdit;
    Label1: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure ComboBox1Select(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmComCZ: TfrmComCZ;

implementation

uses UnitDM;

{$R *.dfm}

procedure TfrmComCZ.FormCreate(Sender: TObject);
var
  selectedFilm:String;
begin
  DM.ComCZDS.Append;

  if DM.AllFilmDS.fieldByName('状态').AsString='可借' then
    selectedFilm:=DM.AllFilmDS.fieldByName('影片号').AsString
  else
    selectedFilm:='';

  DM.AllFilmDS.First;
  while not DM.AllFilmDS.Eof do
  begin
    if DM.AllFilmDS.FieldByName('状态').AsString='可借' then
      ComboBox1.Items.Add(DM.AllFilmDS.FieldByName('影片号').AsString);
    DM.AllFilmDS.Next;
  end;

  if selectedFilm='' then
    ComboBox1.ItemIndex:=0
  else
    ComboBox1.Text:=selectedFilm;
    
  ComboBox1.OnSelect(self);
end;

procedure TfrmComCZ.ComboBox1Select(Sender: TObject);
begin
  DM.AllFilmDS.Locate('影片号',ComboBox1.Text,[]);
  DBEdit1.Text:=DM.AllFilmDS.FieldByName('影片号').AsString;
  DBEdit2.Text:=DM.AllFilmDS.FieldByName('需要押金').AsString;
end;

procedure TfrmComCZ.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  Action:=caFree;
  frmComCZ:=nil;
end;

procedure TfrmComCZ.Button1Click(Sender: TObject);
begin
  DM.ComCZDS.UpdateBatch();
  DM.ComCZDS.Refresh;
  DM.AllFilmDS.Edit;
  DM.AllFilmDS.FieldByName('状态').AsString:='已租出';
  DM.AllFilmDS.UpdateBatch();

  ShowMessage('出租成功');
  frmComCZ.Close;
end;

end.