Class library for file compression

[Krishnaraj Barvathaya B]

Hi All, I am developing an application for some network utility. Right now looking for a .Net library function to compress files before I send them via network. I tried to work with “System.IO.Compression” namespace. But it supports only gzip, which cannot be opened directly with Winzip. Also I am looking at supporting multiple compression formats such as zip, tar etc. I even tried of using #ZipLib. But for some reason I don’t want to use any 3rd party library. Can anybody suggest me how can I achieve this just using .Net libraries. Thanks in advance, Krishnaraj

[Christian Graus]

I think J# has a library you can reuse. Apart from that, if you don't want to use ZipLib, you'll have to rewrite it yourself.

Christian Graus Please read this if you don't understand the answer I've given you "also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

[dan sh]

Using the Zip Classes in the J# Class Libraries to Compress Files and Data with C# [^]

Avoid Google. Use Blackle[^]

[Guffa]

The Compression namespace only does the actual compression. To turn it into a .zip archive, you basically just add a header before the data. If you only ever put a single file in the archive, most of the header looks the same all the time, so that would be pretty easy to write yourself.

Despite everything, the person most likely to be fooling you next is yourself.

[Mike Dimmick]

We generally use #ZipLib[^]. There's an exception which allows it to be used freely in commercial, closed-source products. If you're insistent on doing it only with the supplied libraries, and don't want to go the J# route, System.IO.Compression provides an implementation of the Deflate algorithm in the DeflateStream class. You will need to Deflate each file and write headers as noted in the ZIP Application Note[^], the specification for Zip files.

DoEvents: Generating unexpected recursion since 1991