returnbookdlg.cpp

用MFC写的图书信息管理系统

// ReturnBookDlg.cpp : implementation file
//

#include "stdafx.h"
#include "library.h"
#include "ReturnBookDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CReturnBookDlg dialog


CReturnBookDlg::CReturnBookDlg(CWnd* pView /*=NULL*/)
	: CDialog(CReturnBookDlg::IDD, pView)
{
	//{{AFX_DATA_INIT(CReturnBookDlg)
	m_nBid = 0;
	m_pView=(CLibraryView*)pView;
	m_nRid = 0;
	//}}AFX_DATA_INIT
}


void CReturnBookDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CReturnBookDlg)
	DDX_Text(pDX, IDC_EDIT_RETURN_BOOK_ID, m_nBid);
	DDX_Text(pDX, IDC_EDIT_RETURN_READER_ID, m_nRid);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CReturnBookDlg, CDialog)
	//{{AFX_MSG_MAP(CReturnBookDlg)
	ON_BN_CLICKED(IDC_BUT_EXIT4, OnButExit4)
	ON_BN_CLICKED(IDC_BUT_RETURN_BOOK, OnButReturnBook)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CReturnBookDlg message handlers

void CReturnBookDlg::OnButExit4() 
{
	// TODO: Add your control notification handler code here
	m_pView->PostMessage(DESTROY_RETURN_DLG);
	
}

void CReturnBookDlg::OnButReturnBook() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	int bookid=m_nBid;
	int readerid=m_nRid;
	Reader* r=m_pView->rdb.query(readerid);
	if(r==NULL)
	{
		AfxMessageBox("该读者信息不存在,请核对信息");
		return;
	}
	Book* b=m_pView->bdb.query(bookid);
	if(b==NULL)
	{
		AfxMessageBox("不存在该图书,还书失败，请核对图书信息");
	    return;
	}
	int ret=r->retbook(b->getno());
	if(ret==0)
	{
		AfxMessageBox("读者没有借该书");
		return;
	}
	b->retbook();
	AfxMessageBox("还书成功");
}