MFC对话框读取文件路径

    CFileDialog dialog(TRUE, "data", "*.txt", OFN_NOCHANGEDIR | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
        _T(".data(*.txt)|*.txt||"), NULL);
    if (dialog.DoModal() != IDOK)
        return;
    string path_data = dialog.GetPathName();