borrowdlg.cpp

该软件实现了一个图书馆管理系统

// BorrowDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Forth.h"
#include "BorrowDlg.h"
#include "BookSet.h"
#include "ReaderSet.h"
#include "BorrowSet.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CBorrowDlg dialog


CBorrowDlg::CBorrowDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBorrowDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBorrowDlg)
	m_ReaderId = _T("");
	m_BookId = _T("");
	m_BorrowId = _T("");
	//}}AFX_DATA_INIT
}


void CBorrowDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBorrowDlg)
	DDX_Text(pDX, IDC_EDIT2, m_ReaderId);
	DDX_Text(pDX, IDC_EDIT1, m_BookId);
	DDX_Text(pDX, IDC_EDIT3, m_BorrowId);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CBorrowDlg, CDialog)
	//{{AFX_MSG_MAP(CBorrowDlg)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBorrowDlg message handlers

void CBorrowDlg::OnOK() 
{
	// TODO: Add extra validation here
  
   UpdateData();
   CBookSet book;
   	
	  char chr='%';
       book.m_strFilter.Format("BookId like '%c%s%c'",chr,m_BookId,chr);
   book.Open();
   if(book.IsEOF())
   {
	   MessageBox("不存在这个书号");
	   book.Close();
	   return;
   }
   CReaderSet reader;
   reader.m_strFilter.Format("ReadId like '%c%s%c'",chr,m_ReaderId,chr); 
   reader.Open();
   if(reader.IsEOF())
   {
	   MessageBox("不存在这个读者号");
	   reader.Close();
	   return;
   }
   CBorrowSet borrow;
   borrow.Open();
   borrow.AddNew(); 
   borrow.m_BookId=m_BookId;
   borrow.m_BorrowId=m_BorrowId;
   borrow.m_ReaderId=m_ReaderId;
   if(borrow.CanUpdate())
	  borrow.Update();
   if(borrow.IsOpen())
	   borrow.Close();
   book.Edit();
   book.m_NowAmount=book.m_NowAmount-1;
   if(book.CanUpdate())
	   book.Update();
   book.Close();
   reader.Edit();
   reader.m_NowBorrowNumber=reader.m_NowBorrowNumber+1;
   if(reader.CanUpdate())
	   reader.Update();
   reader.Close();
   CDialog::OnOK();
}