extract 7zip in C# code

Question

I need use 7zip in C#. Without console, just with 7zSharp.dll ? + I find some data here

http://7zsharp.codeplex.com/releases/view/10305 ,

but I don't know how to use it( - I could create .bat(.cmd) file, but I need throught dll file) Exactly: I need extract .7z file with key)

Have you already tried [DotNetZip](http://dotnetzip.codeplex.com/)? — Oliver, Nov 03 '11 at 12:23

score 21 · Answer 1 · edited Oct 05 '17 at 22:33

Download the standalone console version from 7zip.com and add it to your project.

You need those 3 Files added in the project:

7za.exe
7za.dll
7zxa.dll

Don't forget to say Copy to Output Directory in it's preferences.

Extract an archive:

public void ExtractFile(string sourceArchive, string destination)
    {
        string zPath = "7za.exe"; //add to proj and set CopyToOuputDir
        try
        {
            ProcessStartInfo pro = new ProcessStartInfo();
            pro.WindowStyle = ProcessWindowStyle.Hidden;
            pro.FileName = zPath;
            pro.Arguments = string.Format("x \"{0}\" -y -o\"{1}\"", sourceArchive, destination);
            Process x = Process.Start(pro);
            x.WaitForExit();
        }
        catch (System.Exception Ex) {
            //handle error
        }
    }

Create an archive:

public void CreateZip(string sourceName, string targetArchive)
{
    ProcessStartInfo p = new ProcessStartInfo();
    p.FileName = "7za.exe";
    p.Arguments = string.Format("a -tgzip \"{0}\" \"{1}\" -mx=9", targetArchive, sourceName);
    p.WindowStyle = ProcessWindowStyle.Hidden;
    Process x = Process.Start(p);
    x.WaitForExit();
}

Hi, how to include the password in the Arguments to create zipped and extract zipped with the solution above? — hunterex, Aug 21 '18 at 12:37
@hunterex the argument for passwords is "-p" so it's -pMySuperS3cr3tPassword — Uke, Jun 08 '20 at 13:29
In order for ProcessWindowStyle to work, you also need to have UseShellExecute set to true — , Jun 09 '21 at 10:06
Note that `Process` implements `IDisposable`, so don't forget to wrap those last two lines into a `using` statement — taiji123, Oct 01 '21 at 13:16

score 6 · Answer 2 · edited May 23 '17 at 11:54

6

The authors of 7zip provide the LZMA SDK and good documentation which should be able to achieve what you want. The SDK includes C# code capable of compression / decompression.

Another option would be to use a something like C# (.NET) Interface for 7-Zip Archive DLLs

UPDATE: Another user asked a similar question here: How do I create 7-Zip archives with .NET? The answer has several of the same links I provided and a few more.

edited May 23 '17 at 11:54

Community

1
1

answered Nov 03 '11 at 12:17

robowahoo

1,259
9
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Note that the .NET LZMA SDK code does not provide for streaming compression and decompression, so working with large files without writing them to disk is very difficult. The main function is basically something like this: `void Code(Stream in, Stream out)`. Reading a compressed file and processing it as you would require writing a `Stream` class that did the processing as the writes came in. Wrapper streams like `new Decompressingwrapper(compressedInput)` and `new CompressingWrapper(decompressedInput) would make it MUCH easier to use in most scenarios. – James Mar 13 '18 at 22:45

Péter Szilvási · Answer 3 · 2022-07-19T13:38:31.840

Aspose.ZIP can be used to extract zip files with ease. Download it via NuGet package manager.

PM> Install-Package Aspose.Zip

The following code shows how to open or extract 7z file programmatically using C#:

using (SevenZipArchive archive = new SevenZipArchive("Sample.7z"))
{
    archive.ExtractToDirectory(dataDir + "Sample_ExtractionFolder");
}

The code below explains how to extract or unzip a password protected 7zip file programmatically using C#:

using (SevenZipArchive archive = new SevenZipArchive("Sample_Encrypted.7z"))
{
    archive.ExtractToDirectory("Sample_Encrypted7zip", "password");
}

Credit to Farhan Raza's blog post: https://blog.aspose.com/2021/04/28/open-extract-7zip-7z-file-unzip-in-csharp-asp-net/

score 0 · Answer 4 · answered Nov 03 '11 at 12:05

0

It doesn't look like this library supports encrypted files. No method takes a key as a parameter.

answered Nov 03 '11 at 12:05

Christian Wattengård

5,543
5
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...and how I can extract .7z file with key? – koder_mooder Nov 03 '11 at 12:16
not with this lib... You could just use System.Diagnostics to start a console process, but seeing as you don't want to do that... Start reading the SDK :) – Christian Wattengård Nov 03 '11 at 12:21

score 0 · Answer 5 · answered Nov 03 '11 at 12:08

0

The 7zSharp library doesn't seem to support password as input, just a zip file.

The library just calls the .exe of 7zip, so you could donwload the source and alter it to accept a password parameter which you then pass to the executable.

answered Nov 03 '11 at 12:08

CodeCaster

147,647
23
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1

Yeah that's great, I just explained how you could do that. I'm not gonna write the code for you. – CodeCaster Nov 03 '11 at 12:57

extract 7zip in C# code

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