userdlg.cpp

图书管理系统,主要功能有图书的借还,增加,查询等

// Userdlg.cpp : implementation file
//

#include "stdafx.h"
#include "图书管理系统.h"
#include "Userdlg.h"
//#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CUserdlg dialog
extern CMyApp theApp;
CUserdlg::CUserdlg(CWnd* pParent /*=NULL*/)
	: CDialog(CUserdlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CUserdlg)
	m_uname = _T("");
	m_upassword = _T("");
	//}}AFX_DATA_INIT
}


void CUserdlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CUserdlg)
	DDX_Text(pDX, IDC_UNAME, m_uname);
	DDX_Text(pDX, IDC_UPASSWORD, m_upassword);
	//}}AFX_DATA_MAP
}


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

/////////////////////////////////////////////////////////////////////////////
// CUserdlg message handlers


void CUserdlg::OnOK() 
{
	UpdateData(TRUE);
	if (m_uname.IsEmpty() || m_upassword.IsEmpty())
	{
		MessageBox("用户名称或密码不能为空", "用户登录信息");
		GetDlgItem(IDC_UNAME)->SetFocus();
		return;
	}
	sql.Format("select * from reader where readernumber = '%s' and password = '%s'",m_uname,m_upassword);  	
	connect();
	try
	{
		if (!m_pRecordset->BOF)
			{
				pass = true;
				m_pRecordset->Close();
				m_pRecordset=NULL;
				sql.Format("update reader set now='%s' where readernumber='%s'","1",m_uname);
				connect();
				EndDialog(0);
			}	
		else
			{
				m_uname="";
				m_upassword="";
				MessageBox("用户名或密码不正确.","提示",64);
				UpdateData(FALSE);
				GetDlgItem(IDC_UNAME)->SetFocus();
			}
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
	}
}

void CUserdlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	CDialog::OnCancel();
}

void CUserdlg::connect()
{
	m_pRecordset.CreateInstance(__uuidof(Recordset));
	try
	{
		m_pRecordset->Open(sql.AllocSysString(),                // 查询数据库表中所有字段
							theApp.m_pConnection.GetInterfacePtr(),	 // 获取库接库的IDispatch指针
							adOpenDynamic,
							adLockOptimistic,
							adCmdText);
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
	}
}