CFile::GetLength
Uzyskuje bieżącą długość logiczna pliku w bajtach.
virtual ULONGLONG GetLength( ) const;
Wartość zwracana
Długość pliku.
Przykład
CFile* pFile = NULL;
// Constructing a CFile object with this override may throw
// a CFile exception, and won't throw any other exceptions.
// Calling CString::Format() may throw a CMemoryException,
// so we have a catch block for such exceptions, too. Any
// other exception types this function throws will be
// routed to the calling function.
try
{
pFile = new CFile(_T("C:\\WINDOWS\\SYSTEM.INI"),
CFile::modeRead | CFile::shareDenyNone);
ULONGLONG dwLength = pFile->GetLength();
CString str;
str.Format(_T("Your SYSTEM.INI file is %I64u bytes long."), dwLength);
AfxMessageBox(str);
}
catch (CFileException* pEx)
{
// Simply show an error message to the user.
pEx->ReportError();
pEx->Delete();
}
catch(CMemoryException* pEx)
{
pEx->ReportError();
pEx->Delete();
// We can't recover from this memory exception, so we'll
// just terminate the app without any cleanup. Normally,
// an application should do everything it possibly can to
// clean up properly and _not_ call AfxAbort().
AfxAbort();
}
// If an exception occurs in the CFile constructor,
// the language will free the memory allocated by new
// and will not complete the assignment to pFile.
// Thus, our clean-up code needs to test for NULL.
if (pFile != NULL)
{
pFile->Close();
delete pFile;
}
Wymagania
Nagłówek: afx.h