friendsdialogdlg.cpp

< Visual C++数据库经典开发实例精解>>的实例源码

// FriendsDialogDlg.cpp : implementation file
//

#include "stdafx.h"
#include "FriendsDialog.h"
#include "FriendsDialogDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFriendsDialogDlg dialog

CFriendsDialogDlg::CFriendsDialogDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFriendsDialogDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFriendsDialogDlg)
	m_recnews = _T("");
		m_pSet=NULL;
	m_birth = _T("");
	m_email = _T("");
	m_home = _T("");
	m_memo = _T("");
	m_name = _T("");
	m_phone = _T("");
	m_sex = _T("");
	recno=0;
	reccount=0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CFriendsDialogDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFriendsDialogDlg)
	DDX_Text(pDX, IDC_EDIT_RECNEWS, m_recnews);
	DDX_Text(pDX, IDC_EDIT_BIRTH, m_birth);
	DDX_Text(pDX, IDC_EDIT_EMAIL, m_email);
	DDX_Text(pDX, IDC_EDIT_HOME, m_home);
	DDX_Text(pDX, IDC_EDIT_MEMO, m_memo);
	DDX_Text(pDX, IDC_EDIT_NAME, m_name);
	DDX_Text(pDX, IDC_EDIT_PHONE, m_phone);
	DDX_Text(pDX, IDC_EDIT_SEX, m_sex);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFriendsDialogDlg, CDialog)
	//{{AFX_MSG_MAP(CFriendsDialogDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_BUTTON_MOVEFIRST, OnButtonMovefirst)
	ON_BN_CLICKED(IDC_BUTTON_MOVELAST, OnButtonMovelast)
	ON_BN_CLICKED(IDC_BUTTON_MOVENEXT, OnButtonMovenext)
	ON_BN_CLICKED(IDC_BUTTON_MOVEPREV, OnButtonMoveprev)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFriendsDialogDlg message handlers

BOOL CFriendsDialogDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	m_pSet=new CFriendsSet(NULL);
	m_pSet->Open();
	if(!m_pSet->IsEOF())
	{
		while(!m_pSet->IsEOF())
			m_pSet->MoveNext();
		m_pSet->MoveFirst();
		recno=1;
		reccount=m_pSet->GetRecordCount();
		ShowData();
	}
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CFriendsDialogDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CFriendsDialogDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFriendsDialogDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CFriendsDialogDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	if (m_pSet)
	delete m_pSet;	
}

void CFriendsDialogDlg::OnButtonMovefirst() 
{
	if(!(m_pSet->IsBOF() && m_pSet->IsEOF()))
	{	//若有记录，则使第一个记录成为当前记录
		m_pSet->MoveFirst();
		recno=1;
		ShowData();//显示当前记录数据
	}
}

void CFriendsDialogDlg::OnButtonMovelast() 
{
	if(!(m_pSet->IsBOF() && m_pSet->IsEOF()))
	{	//若有记录，则使最后一个记录成为当前记录
		m_pSet->MoveLast();
		recno=m_pSet->GetRecordCount();
		ShowData();//显示当前记录数据
	}
}

void CFriendsDialogDlg::OnButtonMovenext() 
{
	if(!m_pSet->IsEOF())
	{	//若没有到文件末尾，则使下一个记录成为当前记录		
		m_pSet->MoveNext();
		recno++;
		if (m_pSet->IsEOF())
		{
			m_pSet->MoveLast();
			recno=m_pSet->GetRecordCount();
		}
		ShowData();//显示当前记录数据
	}
}

void CFriendsDialogDlg::OnButtonMoveprev() 
{
	if(!m_pSet->IsBOF())
	{	//若没有到文件末尾，则使下一个记录成为当前记录
		m_pSet->MovePrev();
		recno--;
		if (m_pSet->IsBOF())
		{
			m_pSet->MoveFirst();
			recno=1;
		}
		ShowData();//显示当前记录数据
	}
}
void CFriendsDialogDlg::ShowData()
{
	m_recnews.Format("记录号：%d  记录数：%d",recno,reccount);	
	m_birth = m_pSet->m_birth;
	m_email = m_pSet->m_email;
	m_home = m_pSet->m_home;
	m_memo = m_pSet->m_memo;
	m_name = m_pSet->m_name;
	m_phone = m_pSet->m_phone;
	m_sex = m_pSet->m_sex;
	UpdateData(false);
}