CFileDialog mulitple selection limit - is there a workaround ?

In my attempt to capture multiple files using CFileDialog I discovered that there is a limit on the number of characters in the file name buffer. See http://support.microsoft.com/kb/179372

I have used this code to get the file names and it works fine up to the point where the buffer is full. NB: m_vcsPathnames and m_vcsFilenames are std::vector<CString> types.

Code:

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        // get  a list of the files to process
        wchar_t szFilters[]= _T("All Files (*.*)|*.*||");

        // Create an Open dialog; the default file name extension "*.*"
        CFileDialog fileDlg(TRUE, _T(""), _T("*.*"),
      OFN_FILEMUSTEXIST| OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT, szFilters, this);
       
        m_vcsPathnames.resize(0);
        m_vcsFilenames.resize(0);

        if( fileDlg.DoModal ()==IDOK )
        {
                POSITION pos (fileDlg.GetStartPosition() );
                while( pos )
                {
                        CString csPathname( fileDlg.GetNextPathName( pos ) ); 
                        int n = csPathname.ReverseFind('\\');
                        CString csFilename = csPathname.Right(csPathname.GetLength() - n - 1);  TRACE0("csFilename =: "); OutputDebugString(csFilename); TRACE0("\n");
                        m_vcsPathnames.push_back(csPathname);
                        m_vcsFilenames.push_back(csFilename);
                }

        }

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I really need to be able to capture very large numbers of files. Is there any possible work around for this limitation, other than completely writing my own CFileDialogExx class ?

Quote:

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Originally Posted by Mike Pliam

In my attempt to capture multiple files using CFileDialog I discovered that there is a limit on the number of characters in the file name buffer. See http://support.microsoft.com/kb/179372

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The article states that the issue has been fixed since Windows NT SP 2.

Regards,

Paul McKenzie

Dang, I'm still running NT4 SP1.

Where do you set: fileDlg.GetOFN().lpstrFile and fileDlg.GetOFN().nMaxFile ?

Quote:

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Originally Posted by Mike Pliam

I really need to be able to capture very large numbers of files. Is there any possible work around for this limitation, other than completely writing my own CFileDialogExx class ?

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CFileDialog is just a thin wrapper over GetOpenFileName. What's the problem to write a function that suits your needs? You do this every single day, don't you? :confused:

Why use GetOpenFileName instead of CFileDialog ? It had the same restriction that
CFileDialog had. BUt as has been mentioned, that restriction no longer exists. Example:

Code:

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    CFileDialog fileDlg(TRUE, _T(""), _T("*.*"),
      OFN_FILEMUSTEXIST| OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT, szFilters, this);

    const int minimum_number_of_files  = 1000;
    const int buffer_size = minimum_number_of_files  * (MAX_PATH + 1) + 1;

    vector<TCHAR> buffer(buffer_size);

    fileDlg.GetOFN().lpstrFile = &buffer[0];
    fileDlg.GetOFN().nMaxFile = buffer_size;

    // etc

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See also the Remarks section in CFileDialog class documentation.