Compress and Extract with SevenZipSharp

Question

I'm trying to compress and extract files with SevenZipSharp, but I'm getting following error:

Can not load 7-zip library or internal COM error! Message: failed to load library.

My code:

string extractFrom = @"C:\Test\Test.7z";
string extractTo = @"C:\Test2";

string compressFrom = @"C:\Test2";
string compressTo = @"C:\Test\Test2.7z";

SevenZipBase.SetLibraryPath(@"C:\Program Files\7-Zip\7z.dll");

SevenZipCompressor compressor = new SevenZipCompressor();
compressor.CompressionMode = CompressionMode.Create;
compressor.TempFolderPath = Path.GetTempPath();
compressor.ArchiveFormat = OutArchiveFormat.SevenZip;
compressor.CompressDirectory(compressFrom, compressTo);//Error

SevenZipExtractor extractor = new SevenZipExtractor(extractFrom);
extractor.ExtractArchive(extractTo);//Error

The error is at:

compressor.CompressDirectory(compressFrom, compressTo);

and at:

extractor.ExtractArchive(extractTo);

How can I solve this problem?

score 1 · Answer 1 · edited May 23 '17 at 12:03

1

Most obvious answer: the dll is not at the given path.

But I assume you've tried that, but if you mix 32 bit and 64 bit applications this is also a known issue. So if your application is running 32 bits and the 7zip is installed as x64 this error will be thrown.

Also see this: A reference to .dll could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component

edited May 23 '17 at 12:03

Community

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answered Oct 14 '15 at 08:53

Leon

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I tryed with 32-Bit and 64-Bit and both are not working. – daniel59 Oct 14 '15 at 08:55
SevenZipSharp is basically just a wrapper for the COM object - since that error is being thrown I suggest you read into the answer (and links) from the referenced SO question – Leon Oct 14 '15 at 08:57
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I just found my mistake: I use .Net 4.5.2 but SevenZipSharp is just compatible up to .Net 4.0. – daniel59 Oct 14 '15 at 09:10
@daniel59: I use SevenZipSharp, too, but my project uses .Net 4.5.2, so it may have had some other reason in your case. – Tobias Knauss Nov 15 '18 at 13:52

Compress and Extract with SevenZipSharp

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