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c#zipgzipcompression
dps123
dps123

Reputation: 1073

Unzip 4gb file in c#

I am using sharp lib for zip and unzip. It works fine upto 4GB file so looking for some .net framework solution. I tried Gzipcompression in dotnet. That too fails to uncompress 4gb files. Do you know any other zip library which handles large files.

Thanks

Upvotes: 4

Views: 4195

Answers (3)

Patrick
Patrick

Reputation: 1837

If appearance is not an issue, you can use Shell FolderItems (shell32.dll), the only drawbacks are that it's a little tricky to use and you get a Windows progress dialog rather than a callback routine.

Upvotes: 1

João Angelo
João Angelo

Reputation: 57718

The 4 Gb limitation was removed in .NET 4.0, so you can use the classes in System.IO.Compression namespace.

The compression algorithms in System.IO.Compression have been improved in .NET 4. DeflateStream and GZipStream no longer inflate already compressed data. This means that in many cases you’ll see better compression ratios when using these streams on .NET 4. We’ve also removed the 4 GB size limit, so you can now compress streams over 4 GB in length.

From: What's New in BCL

If you cannot target the .NET 4.0 framework then I'm afraid I can't be of any assistance.

Upvotes: 5

Reed Copsey
Reed Copsey

Reputation: 564771

DotNetZip will handle ZIP64 archives (>4.2GB) correctly, in 100% managed code. It also (from my testing) has a dramatically better feature set and does a better job than the framework libraries for compression (ie: equal or better perf. with much smaller files - often about 1/3rd the size of the framework's compression routines).

Upvotes: 7

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