Am Freitag, den 13.05.2005, 09:36 +0200 schrieb [EMAIL PROTECTED]:
> I'm writing a class for changing one or more properties of a SummaryInfo or
> DocumentInfo section
> I started with the CopyCompare example and I have changed it to simply binary
> copy all the sections in order to learn the internal logic of POI sections
> and property sets.
>
> After the copy has been completed the compare of the sections return
> correctly that the contents of the sections copied is the same but ... why
> the size of the file isn't the same of the original and either if the size is
> the same a binary compare show many differences?
>
> The difference in dimension is minimal (some kb) but the integrity of the
> contents of the file is maintained?
This is normal behaviour: Copying a property set stream does generally
not produce a bitwise identical copy.
> Another question: is it possible to change a single property without
> rewriting the entire file, for instance looking for the SummaryInfo file and
> change only the Title property?
No, this is not possible. However, property sets are generally rather
lightweight and it should not present any problem to read *all* of them,
change a single one and write them *all* back to the file.
--
Best regards
Rainer Klute
Rainer Klute IT-Consulting GmbH
Dipl.-Inform.
Rainer Klute E-Mail: [EMAIL PROTECTED]
K�rner Grund 24 Telefon: +49 172 2324824
D-44143 Dortmund Telefax: +49 231 5349423
Inhibit software patents: http://www.nosoftwarepatents.com/
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