Re: How to select a lot of files

From:
"Drew" <dam@dam.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 17 Jun 2008 17:54:56 -0500
Message-ID:
<OlhIr0M0IHA.3920@TK2MSFTNGP02.phx.gbl>
Additional info. If I use this supposed 2048 limit it retrieves the first
filename
correctly but the second file name comes through as '\'. If I go beyound
this limit
it gets the first filename and throws an exception on the second one:

"An invalid argument was encountered."

Here's the code:

 CString filename;
// Ignore hardcoded strings...There for illustration only
 CFileDialog dlg( TRUE, "ext", NULL,
     OFN_HIDEREADONLY | OFN_PATHMUSTEXIST | OFN_OVERWRITEPROMPT |
OFN_ALLOWMULTISELECT,
"My Files (*.ext)|All files (*.*)|*.*||", this);
 POSITION pos;

 //const int c_cbBuffSize = (c_cMaxFiles * (MAX_PATH + 1)) + 1;
 const int c_cbBuffSize = 2048;

 dlg.GetOFN().lpstrFile = filename.GetBuffer(c_cbBuffSize);
 dlg.GetOFN().lpstrFile[0] = '\0';
 dlg.GetOFN().nMaxFile = c_cbBuffSize - 1;

 if (dlg.DoModal() == IDOK) {
  pos = dlg.GetStartPosition();
  try{
   while(pos){
    filename = dlg.GetNextPathName(pos);
   }

   filename.ReleaseBuffer();
  }
  catch( CException* e )
  {
   char message[256];

   e->GetErrorMessage(message, 255);
   e->Delete();

   return;
  }
 }

Thanks,
Drew

"Drew" <dam@dam.com> wrote in message
news:u5tE23L0IHA.2084@TK2MSFTNGP06.phx.gbl...

I'm using OFN_ALLOWMULTISELECT as a CFileDialog style and I am having the
problem that when I select above a certain number of files my DoModal()
call returns IDCANCEL.
The documentation seems to say that by modifying the lpstrFile and
nMaxFile members of the
OPENFILENAME structure I can increase the number of files selectable. The
sample given
in the docs seems to be wrong. What's the proper way to do this?

Thanks,
Drew

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