returnbook.pas

图书管理系统DELPHI版本

unit returnbook;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, StdCtrls, Buttons, ComCtrls;

type
  Treturnbookfrm = class(TForm)
    GroupBox1: TGroupBox;
    ListView1: TListView;
    Label1: TLabel;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    BitBtn3: TBitBtn;
    Label2: TLabel;
    procedure BitBtn3Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  returnbookfrm: Treturnbookfrm;

implementation
   uses global,main,exbookinfo;
{$R *.dfm}

procedure Treturnbookfrm.BitBtn3Click(Sender: TObject);
begin
close;
end;

procedure Treturnbookfrm.BitBtn1Click(Sender: TObject);
begin
if listview1.Items.Count=0 then exit;
if listview1.Selected=nil then
  begin
  messagedlg('您要还哪本图书？',mtinformation,[mbYes],0);
  exit;
  end;
extimebookfrm.paybackbook(listview1.Selected.Caption);
exbook_num :=exbook_num -1;
listview1.Selected.Delete ;
label1.Caption :='共'+inttostr(listview1.Items.Count)+'本';
mainfrm.listbookinfo ;//更新mainfrm中的表
messagedlg('操作成功！',mtinformation,[mbYes],0);
end;

procedure Treturnbookfrm.FormShow(Sender: TObject);
begin
listview1.Items.Clear ;
with mainfrm do
begin
   query1.First ;
   while not query1.Eof do
   begin
   with listview1.Items.Add do
   begin
      caption:=query1.fieldbyname('图书编号').AsString ;
      subitems.Add(query1.fieldbyname('书名').AsString);
      subitems.Add(query1.fieldbyname('作者').AsString);
      subitems.Add(query1.fieldbyname('出版社').AsString);
      subitems.Add(query1.fieldbyname('类别').AsString);
      subitems.Add(query1.fieldbyname('借出时间').AsString);
      subitems.Add(query1.fieldbyname('应还书时间').AsString);
      subitems.Add(query1.fieldbyname('超时').AsString);
      subitems.Add(query1.fieldbyname('罚金').AsString);
   end;
   query1.Next ;
   end;
   query1.First ;
end;
label1.Caption :='共'+inttostr(listview1.Items.Count)+'本';
end;

procedure Treturnbookfrm.BitBtn2Click(Sender: TObject);
var n,i:integer;
begin
n:=listview1.Items.Count;
if n=0 then exit;
if messagedlg('真的全部归还吗？',mtconfirmation,[mbYes,mbNo],0)=mrNo then exit;
for i:=0 to n-1 do
   extimebookfrm.paybackbook(listview1.Items[i].Caption);
listview1.Items.Clear;
exbook_num :=0;
label1.Caption :='共0本';
mainfrm.listbookinfo ;
messagedlg('操作成功！',mtinformation,[mbYes],0);
end;

end.