Compressing files

[Francisco K. do Amaral]

Hi,

I would like to know if there is a API that compress and extract files in
..NET framework.

Thanks.

 

[Gabriele G. Ponti]

Hi,

Take a look at this article:

Using the Zip Classes in the J# Class Libraries to Compress Files and Data
with C#
MSDN Magazine, June 2003
http://msdn.microsoft.com/msdnmag/issues/03/06/ZipCompression/

Regards,

Gabriele

 

[Guest]

If you have XP; use the "compressed folders" API calls.

 

[Gabriele G. Ponti]

Do you know of any documentation available?

 

[Guest]

http://support.microsoft.com/?kbid=329048

%windir%\System32\Zipfldr.dll has teh APIs judging from that KB article

To get the entry points, run depends.exe (dependancy walker)

 

[Gabriele G. Ponti]

Exports from ZIPFLDR.dll
6 exported name(s), 6 export addresse(s). Ordinal base is 1.
Not sorted
RVA Ord. Hint Name
-------- ---- ---- ----
000056CF 6 0000 RouteTheCall
00005836 1 0001 DllCanUnloadNow
00003E7D 2 0002 DllGetClassObject
00005AD2 3 0003 DllRegisterServer
000058F5 4 0004 DllUnregisterServer
00005ACA 5 0005 RegisterSendto


I really don't think that you can get anything useful out of this.
RouteTheCall will just display the UI, and the other functions are just
normal maintenance. You could use CoGetClassObject() to get the pointer to
the interface of the COM object, however the massive use of platform invoke
plus the lack of documentation doesn't make it a viable solution.

Gabriele

 

[Guest]

use oleview then to view the COM typelib for the API then

 

[Gabriele G. Ponti]

---------------------------
OLE/COM Object Viewer

 

[Guest]

Cant you use the public Zlib?

http://www.gzip.org/zlib/

 

[Gabriele G. Ponti]

Why should I use this when there is a class in J# for zipping files that I
can reuse in any .NET program?

 

[Guest]

2 runtimes

 

[Gabriele G. Ponti]

http://www.icsharpcode.net/OpenSource/SharpZipLib/Default.aspx