Unzip a Dynamics Ax 2009 compressed file

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Posted on by JK-30051008-0

Can someone tell me how to unzip a binary file that was compressed in Dynamix Ax 2009 ?

I am trying to do this in C#

The documentation says it is done in lz77, but I have had no luck yet

For information this is a code in X++ that can unzip the file
binData = new BinData();

binData.setData(_blobData);
binData.decompressLZ77();
data = ContainerClass::blob2Container(binData.getData());

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Microsoft Dynamics AX

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Martin Dráb 240,538 Most Valuable Professional on at

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I believe that LZ77 is just one of several algorithms that can be used by ZIP.

Two options I can think of is calling a ZIP software (e.g. 7zip) command-line interface, or using a third-party .NET library (such as DotNetZip) through .NET Interop.

Moved from Integration, Dataverse, and general topics forum to Finance | Project Operations, Human Resources, AX, GP, SL forum.

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JK-30051008-0 13 on at

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@Martin Dráb thanks for answer.
I have already tried the things you suggest with no luck. :/

I seems like there is some custom format on the zipped files, that only Ax can read and unzip.

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Martin Dráb 240,538 Most Valuable Professional on at

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If you're saying that you have a file that can't be unzipped by any ZIP software, then it probably isn't a ZIP file. Do you know how the file was created? Just saying that it was done AX 2009 isn't sufficient.

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JK-30051008-0 13 on at

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here is the Ax 2009 code that zipped the file, can you tell me how to unzip it using C# ?

BinData binData = new BinData();
Blob compressedBlob;

// Convert container to binary
binData.setData(ContainerClass::container2Blob(data));

// Compress using LZ77
binData.compressLZ77();

// Get the compressed data as a Blob
compressedBlob = binData.getData();

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Martin Dráb 240,538 Most Valuable Professional on at

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I can't - I don't know what AX kernel does there under the hood. You could try LZ77 directly, e.g. with Lz77Compressor, but don't you rather want to create a ZIP file instead?

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JK-30051008-0 13 on at

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yeah I wish the one who wrote the code 15 years ago would have just used standard zipping method. But now I am stuck with a bunch of custom zipped files.

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Martin Dráb 240,538 Most Valuable Professional on at

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As I understand, you're able to decompress the file in AX but not C#. If you're "stuck with a bunch of custom zipped files", can't you use X++ to decompress them and save to disk?

It might help if you give us a bit more information about your scenario.

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JK-30051008-0 13 on at

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I want to do this in C#.
I think it is clear that that is not possible.

Thanks for your replies anyway Martin

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Martin Dráb 240,538 Most Valuable Professional on at

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I wouldn't say it's impossible; I even suggested an already existing solution you could try. But of course, it may be quite time-consuming, therefore if you can abandon the idea as impossible, it may be a good thing to do.

Personally, I would claim that "I want to do this in C#" isn't a strong enough argument to justify the investment.

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