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Posted 15 Jan 2012

Zipping using System.IO.Compression

, 1 Nov 2013
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This post shows how to create a zip package using System.IO.Compressio.

To use System.IO.Compression, you need to add a reference to WindowsBase.dll.

The following code snippet shows how to use some of the provided functionalities:

using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Packaging;

public static class ZipHelper
  public static void ZipFiles(string path, IEnumerable<string> files, 
         CompressionOption compressionLevel = CompressionOption.Normal)
    using (FileStream fileStream = new FileStream(path, FileMode.Create))
      ZipHelper.ZipFilesToStream(fileStream, files, compressionLevel);

  public static byte[] ZipFilesToByteArray(IEnumerable<string> files, 
         CompressionOption compressionLevel = CompressionOption.Normal)
    byte[] zipBytes = default(byte[]);
    using (MemoryStream memoryStream = new MemoryStream())
      ZipHelper.ZipFilesToStream(memoryStream, files, compressionLevel);
      zipBytes = memoryStream.ToArray();

    return zipBytes;

  public static void Unzip(string zipPath, string baseFolder)
    using (FileStream fileStream = new FileStream(zipPath, FileMode.Open))
      ZipHelper.UnzipFilesFromStream(fileStream, baseFolder);

  public static void UnzipFromByteArray(byte[] zipData, string baseFolder)
    using (MemoryStream memoryStream = new MemoryStream(zipData))
      ZipHelper.UnzipFilesFromStream(memoryStream, baseFolder);

  private static void ZipFilesToStream(Stream destination, 
          IEnumerable<string> files, CompressionOption compressionLevel)
    using (Package package = Package.Open(destination, FileMode.Create))
      foreach (string path in files)
        // fix for white spaces in file names (by ErrCode)
        Uri fileUri = PackUriHelper.CreatePartUri(new Uri(@"/" + 
                      Path.GetFileName(path), UriKind.Relative));
        string contentType = @"data/" + ZipHelper.GetFileExtentionName(path);

        using (Stream zipStream = 
                package.CreatePart(fileUri, contentType, compressionLevel).GetStream())
          using (FileStream fileStream = new FileStream(path, FileMode.Open))

  private static void UnzipFilesFromStream(Stream source, string baseFolder)
    if (!Directory.Exists(baseFolder))

    using (Package package = Package.Open(source, FileMode.Open))
      foreach (PackagePart zipPart in package.GetParts())
        // fix for white spaces in file names (by ErrCode)
        string path = Path.Combine(baseFolder, 

        using (Stream zipStream = zipPart.GetStream())
          using (FileStream fileStream = new FileStream(path, FileMode.Create))

  private static string GetFileExtentionName(string path)
    string extention = Path.GetExtension(path);
    if (!string.IsNullOrWhiteSpace(extention) && extention.StartsWith("."))
      extention = extention.Substring(1);

    return extention;

Enjoy it!


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

United States United States
I got my BS in Software Engineering from Iran, worked there for 4.5 years mainly in industrial automation field. Then I moved to Australia. In Australia, I had a great chance to work at some big companies. Since 2009 I have been living in the States. I received my MS in Information Systems from Illinois State University. Currently, I am a Senior Software Development Engineer.

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Comments and Discussions

QuestionSystem.IO.FileNotFoundException: Could not find file 'C:\Windows\system32\[file to zip] Pin
mtoha15-Feb-16 19:43
membermtoha15-Feb-16 19:43 
QuestionHow about folders Pin
pishkari24-Sep-14 0:35
memberpishkari24-Sep-14 0:35 
GeneralArticle with demo of compression. Pin
DaveAuld1-Nov-13 6:56
protectorDaveAuld1-Nov-13 6:56 
GeneralRe: Article with demo of compression. Pin
Tecfield1-Nov-13 7:59
memberTecfield1-Nov-13 7:59 
GeneralMy vote of 3 Pin
BillWoodruff15-Jul-13 18:25
memberBillWoodruff15-Jul-13 18:25 
GeneralRe: My vote of 3 Pin
Tecfield16-Jul-13 3:09
memberTecfield16-Jul-13 3:09 
GeneralRe: My vote of 3 Pin
BillWoodruff24-Jul-13 23:34
memberBillWoodruff24-Jul-13 23:34 
GeneralRe: My vote of 3 Pin
Tecfield25-Jul-13 3:03
memberTecfield25-Jul-13 3:03 
GeneralMy vote of 5 Pin
Abey Thomas2-Nov-12 20:44
memberAbey Thomas2-Nov-12 20:44 
QuestionCopy Stream Pin
Paul @ The Computer Station31-Oct-12 12:39
groupPaul @ The Computer Station31-Oct-12 12:39 
AnswerRe: Copy Stream Pin
Tecfield1-Nov-12 3:13
memberTecfield1-Nov-12 3:13 
Questionpackage.GetParts() issue in UnzipFilesFromStream Pin
Ayusman110-Aug-12 2:39
memberAyusman110-Aug-12 2:39 
AnswerRe: package.GetParts() issue in UnzipFilesFromStream Pin
Tecfield10-Aug-12 3:08
memberTecfield10-Aug-12 3:08 
GeneralRe: Sorry, no malice intended here, but this is a general commen... Pin
Darren Doody26-Jan-12 15:14
memberDarren Doody26-Jan-12 15:14 
GeneralReason for my vote of 5 this is better than j . Pin
javaevangelist7-Feb-12 8:39
memberjavaevangelist7-Feb-12 8:39 
GeneralNice, but please specify .NET version required. In the titl... Pin
Darren Doody26-Jan-12 13:00
memberDarren Doody26-Jan-12 13:00 
GeneralRe: As long as you can make a reference to <code>WindowsBase.dll... Pin
Tecfield26-Jan-12 15:05
memberTecfield26-Jan-12 15:05 
GeneralReason for my vote of 5 Nice example Pin
loctrice24-Jan-12 9:09
memberloctrice24-Jan-12 9:09 
GeneralVery nice. It does not handle subdirectories (at least not i... Pin
loctrice24-Jan-12 9:08
memberloctrice24-Jan-12 9:08 
GeneralReason for my vote of 5 it is nice one. works with out any t... Pin
venkata124-Jan-12 5:16
membervenkata124-Jan-12 5:16 
GeneralThank you very much for the good article. But I tried to zip... Pin
venkata124-Jan-12 5:10
membervenkata124-Jan-12 5:10 
GeneralRe: Sorry. I got it working. This is due to the white space in S... Pin
venkata124-Jan-12 5:14
membervenkata124-Jan-12 5:14 
SuggestionRe: Sorry. I got it working. This is due to the white space in S... Pin
ErrCode31-Oct-13 19:31
memberErrCode31-Oct-13 19:31 
GeneralRe: Sorry. I got it working. This is due to the white space in S... Pin
Tecfield1-Nov-13 1:34
memberTecfield1-Nov-13 1:34 
GeneralThere is no license mentioned here. Can one use this code in... Pin
ivanicin23-Jan-12 13:37
memberivanicin23-Jan-12 13:37 

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