Long FileNames

When I use file open, mru, or drag and drop a longfilename onto my program the view window has the name in it's title. If I start my app by dropping a longfilename onto the app, my view is titled abcdef~1, not abcdefghi. What is going on. How do I set the correct filename.

Thanks

This appears to be the shell using the 8.3 filename (perhaps in case the program being started is 16-bit). In your app's InitInstance(), where the command line is parsed, you should check if a filename is specified and use FindFirstFile(), GetFullPathName() or GetLongFileName() to get the long version before passing it on.

The last remnants of DOS 8.3 filenames that still haven't been cleaned out of windows! I haven't had this problem with the MRU or file open but drag and drop is a killer.

All you need is the function that turns a sausage into a pig!
The function that turns a DOS 8.3 filename into a long file name.
I recently saw a posting on CodeGuru of a function that does this.
Look at http://www.codeguru.com/win32/ShowPath.shtml
If that doesn't work for you I've appended my own version of such a function to the end of this message.

You then need to convert the short name to a long name before you open the file.
You can do this by overriding CWinApp::OpenDocumentFile() and converting the path passed in to a long name before passing it on to the base class e.g.


CDocument* CMyApp::OpenDocumentFile(LPCTSTR lpszFileName)
{
return CWinApp::OpenDocumentFile(shortNameToLongName( lpszFileName));
}




This catches the short name and converts before the window title gets set. Has the added advantage that if you use the standard C file functions like fopen they will work (they fail on 8.3 filenames).

Here is the code to turn a short name into a long name:



// convert short DOS 8.3 name to long name for file path
CString shortNameToLongName(CString shortName)
{
WIN32_FIND_DATA fd;
HANDLE hSearch;
DWORD size;
BOOL res;

// get current directory so we can restore later
size = GetCurrentDirectory(0, NULL);
LPTSTR currDir = new _TCHAR[size + 1];
GetCurrentDirectory(size, currDir);

if (shortName.Find(_T('\\')) < 0)
{
// not a full path - just return it
return shortName;
}


// Is it UNC style (//server/share/...) or normal (drive:/...)
if (shortName.Left(2) == _T("\\\\"))
{
// UNC so we to do CD //server/share
CString s = shortName.Right(shortName.GetLength() - 2);
int pos = s.Find(_T('\\'));
ASSERT(pos);
CString server = shortName.Left(pos + 2);
s = s.Right(s.GetLength() - pos - 1);
pos = s.Find(_T('\\'));
ASSERT(pos);
CString share = s.Left(pos);
res = SetCurrentDirectory(server + _T("\\") + share);
ASSERT(res);
shortName = s.Right(s.GetLength() - pos - 1);
} else
{
// Normal so we do CD "C:\"
int pos = shortName.Find(_T('\\'));
CString drive = shortName.Left(pos + 1);
res = SetCurrentDirectory(drive);
ASSERT(res);
shortName = shortName.Right(shortName.GetLength() - pos - 1);
}

int pos = shortName.Find(_T('\\'));
while (pos >= 0)
{
CString s = shortName.Left(pos);
hSearch = FindFirstFile( s, &fd );
ASSERT(hSearch != INVALID_HANDLE_VALUE);
FindClose(hSearch);
res = SetCurrentDirectory(fd.cFileName);
ASSERT(res);
shortName = shortName.Right(shortName.GetLength() - pos - 1);
pos = shortName.Find(_T('\\'));
}

// Whats left in shortName is filename - convert it long
hSearch = FindFirstFile( shortName, &fd );
ASSERT(hSearch != INVALID_HANDLE_VALUE);

// Now append it to current
// directory.
size = GetCurrentDirectory(0, NULL);
LPTSTR dir = new _TCHAR[size + 1];
GetCurrentDirectory(size, dir);
CString result = CString(dir) + _T("\\") + fd.cFileName;

// go back to initial directory
res = SetCurrentDirectory(currDir);
ASSERT(res);
delete currDir;
delete dir;

return result;
}