MFC中数据文件的存储和加载

struct SData
{
    UINT nNumb;
    TCHAR sName[20];
    COleDateTime date;
};

void CfffDlg::OnBnClickedSave()
{
    //另存为对话框
    CFileDialog fd(FALSE, _T("*.fff"), _T("example"), OFN_OVERWRITEPROMPT, _T("信息文件(*.fff)|*.fff|所有文件|*.*||"), NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    CFile file;
    if (!file.Open(fd.GetPathName(), CFile::modeCreate | CFile::modeWrite))
    {
        MessageBox(_T("保存文件出错！"), _T("Tip"));
        return;
    }
    SData s;
    for (int i = 0; i < m_list.GetItemCount(); ++i)
    {
        s.nNumb = _ttoi(m_list.GetItemText(i,0));
        m_list.GetItemText(i, 1, s.sName, sizeof(s.sName) / sizeof(s.sName[0]));
        s.date.ParseDateTime(m_list.GetItemText(i, 2));
        file.Write(&s, sizeof(s));
    }
}


void CfffDlg::OnBnClickedLoad()
{
    // TODO:  在此添加控件通知处理程序代码
    LPCTSTR szFilter = _T("信息文件(*.fff)|*.fff|所有文件|*.*||");
    //打开对话框
    CFileDialog fd(TRUE, _T("*.fff"), NULL, OFN_FILEMUSTEXIST, szFilter, NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    CFile file;
    if (!file.Open(fd.GetPathName(), CFile::modeRead))
    {
        MessageBox(_T("打开文件失败！"));
        return;
    }
    SData s;
    CString str;
    m_list.DeleteAllItems();
    for (int i = 0; file.Read(&s, sizeof(s)) == sizeof(s); ++i)
    {
        str.Format(_T("%d"), s.nNumb);
        m_list.InsertItem(i, str);
        m_list.SetItemText(i, 1, s.sName);
        m_list.SetItemText(i, 2, s.date.Format(VAR_DATEVALUEONLY));
    }
}

void CfffDlg::OnBnClickedSave()
{
    ////另存为对话框
    CFileDialog fd(FALSE, _T("*.fff"), _T("example"), OFN_OVERWRITEPROMPT, _T("信息文件(*.fff)|*.fff|所有文件|*.*||"), NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    CFile file;
    if (!file.Open(fd.GetPathName(), CFile::modeCreate | CFile::modeWrite))
    {
        MessageBox(_T("保存文件出错！"), _T("Tip"));
        return;
    }
    //通过一个打开状态的文件，构造一个用于保存数据的归档对象
    CArchive ar(&file, CArchive::store);
    int i = 0, nCount = m_list.GetItemCount();
    ar << nCount;//先把信息总数（行）保存，以备提取数据
    while (i < nCount)
    {
        int nNumb = _ttoi(m_list.GetItemText(i, 0));
        CString szName = m_list.GetItemText(i, 1);
        COleDateTime time;
        time.ParseDateTime(m_list.GetItemText(i, 2));
        ar << nNumb << szName << time;//读取数据时严格按照此顺序
        ++i;
    }
}


void CfffDlg::OnBnClickedLoad()
{
    LPCTSTR szFilter = _T("信息文件(*.fff)|*.fff|所有文件|*.*||");
    //打开对话框
    CFileDialog fd(TRUE, _T("*.fff"), NULL, OFN_FILEMUSTEXIST, szFilter, NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    CFile file;
    if (!file.Open(fd.GetPathName(), CFile::modeRead))
    {
        MessageBox(_T("打开文件失败！"));
        return;
    }
    CArchive ar(&file, CArchive::load);
    int nCount = 0;
    ar >> nCount;

    m_list.DeleteAllItems();
    int nNumb = 0;
    CString szName;
    COleDateTime time;
    CString str;
    int i = 0;
    while (i < nCount)
    {
        ar >> nNumb >> szName >> time;
        str.Format(_T("%d"), nNumb);
        m_list.InsertItem(i, str);
        m_list.SetItemText(i, 1, szName);
        str = time.Format(VAR_DATEVALUEONLY);
        m_list.SetItemText(i, 2, str);
        ++i;
    }
}

void CfffDlg::OnBnClickedSave()
{
    CFileDialog fd(FALSE, _T("*.fff"), _T("example"), OFN_OVERWRITEPROMPT, _T("信息文件(*.fff)|*.fff|所有文件|*.*||"), NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    m_doc.OnSaveDocument(fd.GetPathName());
}


void CfffDlg::OnBnClickedLoad()
{
    LPCTSTR szFilter = _T("信息文件(*.fff)|*.fff|所有文件|*.*||");
    //打开对话框
    CFileDialog fd(TRUE, _T("*.fff"), NULL, OFN_FILEMUSTEXIST, szFilter, NULL);
    if (IDCANCEL == fd.DoModal())
        return;
    m_doc.OnOpenDocument(fd.GetPathName());
}


void CfffDlg::Serialize(CArchive& ar)
{
    if (ar.IsStoring())
    {    // storing code
        int i = 0, nCount = m_list.GetItemCount();
        ar << nCount;//先把信息总数（行）保存，以备提取数据
        while (i < nCount)
        {
            int nNumb = _ttoi(m_list.GetItemText(i, 0));
            CString szName = m_list.GetItemText(i, 1);
            COleDateTime time;
            time.ParseDateTime(m_list.GetItemText(i, 2));
            ar << nNumb << szName << time;//读取数据时严格按照此顺序
            ++i;
        }
    }
    else
    {    // loading code
        int nCount = 0;
        ar >> nCount;
        m_list.DeleteAllItems();
        int nNumb = 0;
        CString szName;
        COleDateTime time;
        CString str;
        int i = 0;
        while (i < nCount)
        {
            ar >> nNumb >> szName >> time;
            str.Format(_T("%d"), nNumb);
            m_list.InsertItem(i, str);
            m_list.SetItemText(i, 1, szName);
            str = time.Format(VAR_DATEVALUEONLY);
            m_list.SetItemText(i, 2, str);
            ++i;
        }
    }
}