ginnivanj, for x64 apps, you should use the x64 version of 7z.dll (native 7-zip library) instead of 32 bit.

Umm... I'm not sure if I stated this before, but I was pretty sure I did O_o

Anyway, for a website to be able to use the 7zip library from a 64 bit .NET app, you have to use the 64 bit 7z.dll. Just download the full 64 bit 7zip app, and take the dll from there :)

Alternatively, compile your app with only x86 support (not "All Platforms") in which case you would be able to use the 32 bit one..

P.S. Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),  "7z.dll") in a website will return a path somewhere deep inside the windows dir, not your website's bin directory. That's why I asked markhor to add the AppSettings part, so that I don't have to specify the dll path EVERY single time I create the extractor or the compressor :P

Best regards,

/me

hello
Could you tell me what you have done for not having the following bug: Can not load 7-zip library or internal COM error! Message: failed to load library.
for now I blocked the above
Here is an part of my code in vb.net 2010 :
Imports SevenZip

sub extract(destindl as string)
If File.Exists(Application.StartupPath & "\7z.dll") = True Then
                SevenZipExtractor.SetLibraryPath(Application.StartupPath & "\7z.dll")
            Else
                Principal.voirinfo("Not Found 7z.dll")

                exit sub
            End If
Dim ext As SevenZipExtractor = New SevenZipExtractor(destindl) 'here error

end sub
excuse me for my bad english and thanks you for your help

my answer is my project for x86 and my version I used was of 7z.dll x64

I think I found the problem after a couple of hours of trying.

If your application/website is running in x64 and you try to SetLibraryPath to the x86, it will fail.

Solution?

1. Make sure you have both 7z.dll and 7z64.dll in your bin folder. I did that by adding the file to the project, using add existing file. Then, on properties, "Copy to outpu directory: always".

2. Now, you need to figure out which version to include:

if (IntPtr.Size == 8) //x64
    SevenZip.SevenZipExtractor.SetLibraryPath(Path.Combine(HttpContext.Current.Server.MapPath("~"), "bin", "7z64.dll"));
else //x86
    SevenZip.SevenZipExtractor.SetLibraryPath(Path.Combine(HttpContext.Current.Server.MapPath("~"), "bin", "7z.dll"));

I solve my problem granting access to "network service" user to the 7z.dll file. 

sorry for the english. 

tshh wrote:
I have a problem while using SevenZipSharp. When I use it in a console application, it works fine. But when it is used in a website, the code will raise a SevenZipLibraryException.

Detail
SevenZip.SevenZipLibraryException was caught
Message="Can not load 7-zip library or internal COM error! Message: failed to load library."
Source="SevenZipSharp"
StackTrace:
at SevenZip.SevenZipLibraryManager.LoadLibrary(Object user, Enum format)
at SevenZip.SevenZipExtractor.Init(Stream stream, InArchiveFormat format)
at SevenZip.SevenZipExtractor..ctor(Stream archiveStream, InArchiveFormat format)

Thanks.

See my blog post for the solution: http://blog.jongallant.com/2011/10/7-zip-dll-file-does-not-exist.html

I don't have any issue in local but in live web server I am also facing same error : Can not load 7-zip library or internal COM error! Message: failed to load library. 

we are using the 32 bit server. and here is code

SevenZip.SevenZipExtractor.SetLibraryPath(Path.Combine(HttpContext.Current.Server.MapPath("~"), "bin", "7z.dll"));

please help me to resolve this issue.

Thanks 

Mahesh

How did you do that could you please explain me with step by steps.

Thanks,

Mahesh

Explain... ¿who?, ¿what of all the things?