Zip folder in C#

Question

What is an example (simple code) of how to zip a folder in C#?

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Update:

I do not see namespace ICSharpCode. I downloaded ICSharpCode.SharpZipLib.dll but I do not know where to copy that DLL file. What do I need to do to see this namespace?

And do you have link for that MSDN example for compress folder, because I read all MSDN but I couldn't find anything.

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OK, but I need next information.

Where should I copy ICSharpCode.SharpZipLib.dll to see that namespace in Visual Studio?

Answer 1

Following code uses a third-party ZIP component from Rebex:

// add content of the local directory C:\Data\  
// to the root directory in the ZIP archive
// (ZIP archive C:\archive.zip doesn't have to exist) 
Rebex.IO.Compression.ZipArchive.Add(@"C:\archive.zip", @"C:\Data\*", "");

Or if you want to add more folders without need to open and close archive multiple times:

using Rebex.IO.Compression;
...

// open the ZIP archive from an existing file 
ZipArchive zip = new ZipArchive(@"C:\archive.zip", ArchiveOpenMode.OpenOrCreate);

// add first folder
zip.Add(@"c:\first\folder\*","\first\folder");

// add second folder
zip.Add(@"c:\second\folder\*","\second\folder");

// close the archive 
zip.Close(ArchiveSaveAction.Auto);

You can download the ZIP component here.

Using a free, LGPL licensed SharpZipLib is a common alternative.

Disclaimer: I work for Rebex

Answer 2

"Where should I copy ICSharpCode.SharpZipLib.dll to see that namespace in Visual Studio?"

You need to add the dll file as a reference in your project. Right click on References in the Solution Explorer->Add Reference->Browse and then select the dll.

Finally you'll need to add it as a using statement in whatever files you want to use it in.

Answer 3

using DotNetZip (available as nuget package):

public void Zip(string source, string destination)
{
    using (ZipFile zip = new ZipFile
    {
        CompressionLevel = CompressionLevel.BestCompression
    })
    {
        var files = Directory.GetFiles(source, "*",
            SearchOption.AllDirectories).
            Where(f => Path.GetExtension(f).
                ToLowerInvariant() != ".zip").ToArray();

        foreach (var f in files)
        {
            zip.AddFile(f, GetCleanFolderName(source, f));
        }

        var destinationFilename = destination;

        if (Directory.Exists(destination) && !destination.EndsWith(".zip"))
        {
            destinationFilename += $"\\{new DirectoryInfo(source).Name}-{DateTime.Now:yyyy-MM-dd-HH-mm-ss-ffffff}.zip";
        }

        zip.Save(destinationFilename);
    }
}

private string GetCleanFolderName(string source, string filepath)
{
    if (string.IsNullOrWhiteSpace(filepath))
    {
        return string.Empty;
    }

    var result = filepath.Substring(source.Length);

    if (result.StartsWith("\\"))
    {
        result = result.Substring(1);
    }

    result = result.Substring(0, result.Length - new FileInfo(filepath).Name.Length);

    return result;
}

Usage:

Zip(@"c:\somefolder\subfolder\source", @"c:\somefolder2\subfolder2\dest");

Or

Zip(@"c:\somefolder\subfolder\source", @"c:\somefolder2\subfolder2\dest\output.zip");

Answer 4

ComponentPro ZIP can help you achieve that task. The following code snippet compress files and dirs in a folder. You can use wilcard mask as well.

using ComponentPro.Compression;
using ComponentPro.IO;

...

// Create a new instance.
Zip zip = new Zip();
// Create a new zip file.
zip.Create("test.zip");

zip.Add(@"D:\Temp\Abc"); // Add entire D:\Temp\Abc folder to the archive.

// Add all files and subdirectories from 'c:\test' to the archive.
zip.AddFiles(@"c:\test");
// Add all files and subdirectories from 'c:\my folder' to the archive.
zip.AddFiles(@"c:\my folder", "");
// Add all files and subdirectories from 'c:\my folder' to '22' folder within the archive.
zip.AddFiles(@"c:\my folder2", "22");
// Add all .dat files from 'c:\my folder' to '22' folder within the archive.
zip.AddFiles(@"c:\my folder2", "22", "*.dat");
// Or simply use this to add all .dat files from 'c:\my folder' to '22' folder within the archive.
zip.AddFiles(@"c:\my folder2\*.dat", "22");
// Add *.dat and *.exe files from 'c:\my folder' to '22' folder within the archive.
zip.AddFiles(@"c:\my folder2\*.dat;*.exe", "22");

TransferOptions opt = new TransferOptions();
// Donot add empty directories.
opt.CreateEmptyDirectories = false;
zip.AddFiles(@"c:\abc", "/", opt);

// Close the zip file.
zip.Close();

http://www.componentpro.com/doc/zip has more examples