continueborrowdlg.cpp

来自「mysql+visual C++编写的mini图书馆数据库管理系统」· C++ 代码 · 共 71 行

// ContinueBorrowDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Library.h"
#include "ContinueBorrowDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CContinueBorrowDlg dialog


CContinueBorrowDlg::CContinueBorrowDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CContinueBorrowDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CContinueBorrowDlg)
	m_strBookNum = _T("");
	m_strCardNum = _T("");
	//}}AFX_DATA_INIT
}


void CContinueBorrowDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CContinueBorrowDlg)
	DDX_Text(pDX, IDC_BOOKNUM, m_strBookNum);
	DDX_Text(pDX, IDC_CARDNUM, m_strCardNum);
	//}}AFX_DATA_MAP
}


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

/////////////////////////////////////////////////////////////////////////////
// CContinueBorrowDlg message handlers

void CContinueBorrowDlg::OnOK() 
{
	// TODO: Add extra validation here
	UpdateData();
	CTimeSpan span(30,0,0,0); //30天的时间间隔
	CTime nextMonth = CTime::GetCurrentTime()+span;  //30天后的日期
	if(! m_borrowSet.IsOpen()){
		m_borrowSet.Open();
	}
    m_borrowSet.m_strFilter.Format("ISBN='%s' AND cno='%s'",m_strBookNum,m_strCardNum);
	m_borrowSet.Requery();
	if(!m_borrowSet.IsEOF())
	{
		m_borrowSet.Edit();
		m_borrowSet.m_return_date=nextMonth;
		m_borrowSet.Update();
		CString s="恭喜，续借成功!\n该书的还书日期已更新为";
		CString s1=nextMonth.Format( "%Y-%m-%d %H:%M:%S" );
		s+=s1;
        AfxMessageBox(s);
	}
	else
		AfxMessageBox("您输入的卡号、书号有误，无法完成续借!");
	CDialog::OnOK();
}