carddrop.cpp

一个图书管理程序 其中数据库部分需要自己设置 具体设置请参看源码

// CardDrop.cpp : 实现文件
//

#include "stdafx.h"
#include "library.h"
#include "CardDrop.h"
#include "card.h"
#include "borrow.h"

// CCardDrop 对话框

IMPLEMENT_DYNAMIC(CCardDrop, CDialog)

CCardDrop::CCardDrop(CWnd* pParent /*=NULL*/)
	: CDialog(CCardDrop::IDD, pParent)
	, m_cardnum(_T(""))
{

}

CCardDrop::~CCardDrop()
{
}

void CCardDrop::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_CARD_DROP, m_cardnum);
}


BEGIN_MESSAGE_MAP(CCardDrop, CDialog)
	ON_BN_CLICKED(IDOK, &CCardDrop::OnBnClickedOk)
END_MESSAGE_MAP()


// CCardDrop 消息处理程序

void CCardDrop::OnBnClickedOk()
{
	// TODO: 在此添加控件通知处理程序代码
	if(!m_cardSet.IsOpen())
		m_cardSet.Open();
	if(!m_borrowSet.IsOpen())
		m_borrowSet.Open();

	this->UpdateData();
	m_cardSet.m_strFilter=(CString)"cno like '"+(CString)m_cardnum+(CString)"' ";
	m_cardSet.Requery();
	m_borrowSet.m_strFilter=(CString)"cno like'"+(CString)m_cardnum+(CString)"'";
	m_borrowSet.Requery();

	if(!m_cardSet.IsEOF())
	{
		if(!m_borrowSet.IsEOF())
			if (MessageBox(_T("该卡号有未归还图书，确认要删除改卡号?"), _T("确认"), MB_OKCANCEL | MB_ICONQUESTION) == IDOK)
			{
				m_cardSet.Delete();
				while(!m_borrowSet.IsEOF())
				{
					m_borrowSet.Delete();
					m_borrowSet.MoveNext();
				}
				AfxMessageBox(_T("注销成功"));
			}
		
	}
	else
		AfxMessageBox(_T("没有该卡号"));
	

	OnOK();
}