Unzip files programmatically in net

Question

I am trying to programatically unzip a zipped file   I have tried using the System IO Compression GZipStream class in  NET  but when my app runs  actually a unit test  I get this exception       System IO InvalidDataException  The magic number in GZip header is not correct  Make sure you are passing in a GZip stream     I now realize that a  zip file is not the same as a  gz file  and that GZip is not the same as Zip    However  since I m able to extract the file by manually double clicking the zipped file and then clicking the  Extract all files -button  I think there should be a way of doing that in code as well    Therefore I ve tried to use Process Start   with the path to the zipped file as input  This causes my app to open a Window showing the contents in the zipped file  That s all fine  but the app will be installed on a server with none around to click the  Extract all files -button    So  how do I get my app to extract the files in the zipped files   Or is there another way to do it  I prefer doing it in code  without downloading any third party libraries or apps  the security department ain t too fancy about that

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Free  and no external DLL files   Everything is in one CS file   One download is just the CS file  another download is a very easy to understand example   Just tried it today and I can t believe how simple the setup was   It worked on first try  no errors  no nothing   https   github com jaime-olivares zipstorer

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you can use Info-unzip command line cod you only need to download unzip exe from Info-unzip official website    internal static void Unzip string sorcefile                try                       AFolderFiles AFolderFilesDelete DeleteFolder TempBackupFolder      delete old folder                AFolderFiles AFolderFilesCreate CreateIfNotExist TempBackupFolder      delete old folder                 need to Command command also to export attributes to a excel file             System Diagnostics Process process   new System Diagnostics Process                System Diagnostics ProcessStartInfo startInfo   new System Diagnostics ProcessStartInfo                startInfo WindowStyle   System Diagnostics ProcessWindowStyle Hidden     window type             startInfo FileName   UnzipExe              startInfo Arguments   sorcefile     -d     TempBackupFolder              process StartInfo   startInfo              process Start                  string result   process StandardOutput ReadToEnd                process WaitForExit                process Dispose                process Close                      catch  Exception ex   throw ex

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I use this to either zip or unzip multiple files   The Regex stuff is not required  but I use it to change the date stamp and remove unwanted underscores   I use the empty string in the Compress    zipPath string to prefix something to all files if required   Also  I usually comment out either Compress   or Decompress   based on what I am doing   using System  using System IO Compression  using System IO  using System Text RegularExpressions   namespace ZipAndUnzip       class Program               static void Main string   args                        var directoryPath   new DirectoryInfo   C  your path                  Compress directoryPath               Decompress directoryPath                      public static void Compress DirectoryInfo directoryPath                        foreach  DirectoryInfo directory in directoryPath GetDirectories                                  var path   directoryPath FullName                  var newArchiveName   Regex Replace directory Name    0-9  8     20130913                    newArchiveName   Regex Replace newArchiveName                                string startPath   path   directory Name                  string zipPath   path        newArchiveName     zip                    ZipFile CreateFromDirectory startPath  zipPath                                     public static void Decompress DirectoryInfo directoryPath                        foreach  FileInfo file in directoryPath GetFiles                                  var path   directoryPath FullName                  string zipPath   path   file Name                  string extractPath   Regex Replace path   file Name    zip                         ZipFile ExtractToDirectory zipPath  extractPath

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You can do it all within  NET 3 5 using DeflateStream  The thing lacking in  NET 3 5 is the ability to process the file header sections that are used to organize the zipped files  PKWare has published this information  which you can use to process the zip file after you create the structures that are used  It is not particularly onerous  and it a good practice in tool building without using 3rd party code   It isn t a one line answer  but it is completely doable if you are willing and able to take the time yourself  I wrote a class to do this in a couple of hours and what I got from that is the ability to zip and unzip files using  NET 3 5 only

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Standard zip files normally use the deflate algorithm   To extract files without using third party libraries use DeflateStream  You ll need a bit more information about the zip file archive format as Microsoft only provides the compression algorithm   You may also try using zipfldr dll  It is Microsoft s compression library  compressed folders from the Send to menu   It appears to be a com library but it s undocumented  You may be able to get it working for you through experimentation

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I found out about this one  Unzip package on NuGet  today  since I ran into a hard bug in DotNetZip  and I realized there hasn t been really that much work done on DotNetZip for the last two years   The Unzip package is lean  and it did the job for me - it didn t have the bug that DotNetZip had  Also  it was a reasonably small file  relying upon the Microsoft BCL for the actual decompression  I could easily make adjustments which I needed  to be able to keep track of the progress while decompressing   I recommend it

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With  NET 4 5 you can now unzip files using the  NET framework   using System  using System IO   namespace ConsoleApplication     class Program         static void Main string   args              string startPath     c  example start         string zipPath     c  example result zip         string extractPath     c  example extract          System IO Compression ZipFile CreateFromDirectory startPath  zipPath         System IO Compression ZipFile ExtractToDirectory zipPath  extractPath                 The above code was taken directly from Microsoft s documentation  http   msdn microsoft com en-us library ms404280 v vs 110  aspx  ZipFile is contained in the assembly System IO Compression FileSystem   Thanks nateirvin   see comment below

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We have used SharpZipLib successfully on many projects  I know it s a third party tool  but source code is included and could provide some insight if you chose to reinvent the wheel here

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String ZipPath     c  my data zip   String extractPath     d   myunzips   ZipFile ExtractToDirectory ZipPath  extractPath     To use the ZipFile class  you must add a reference to the System IO Compression FileSystem assembly in your project

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For  Net 4 5   It is not always desired to write the uncompressed file to disk  As an ASP Net developer  I would have to fiddle with permissions to grant rights for my application to write to the filesystem  By working with streams in memory  I can sidestep all that and read the files directly   using  ZipArchive archive   new ZipArchive postedZipStream         foreach  ZipArchiveEntry entry in archive Entries                 var stream   entry Open               Do awesome stream stuff             Alternatively  you can still write the decompressed file out to disk by calling ExtractToFile     using  ZipArchive archive   ZipFile OpenRead pathToZip         foreach  ZipArchiveEntry entry in archive Entries                entry ExtractToFile Path Combine destination  entry FullName               To use the ZipArchive class  you will need to add a reference to the System IO Compression namespace and to System IO Compression FileSystem

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From here       Compressed GZipStream objects written   to a file with an extension of  gz can   be decompressed using many common   compression tools  however  this class   does not inherently provide   functionality for adding files to or   extracting files from  zip archives

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Use the DotNetZip library at http   www codeplex com DotNetZip     class library and toolset for manipulating zip files  Use VB  C  or any  NET language to easily create  extract  or update zip files         DotNetZip works on PCs with the full  NET Framework  and also runs on mobile devices that use the  NET Compact Framework  Create and read zip files in VB  C   or any  NET language  or any scripting environment         If all you want is a better DeflateStream or GZipStream class to replace the one that is built-into the  NET BCL  DotNetZip has that  too  DotNetZip s DeflateStream and GZipStream are available in a standalone assembly  based on a  NET port of Zlib  These streams support compression levels and deliver much better performance than the built-in classes  There is also a ZlibStream to complete the set  RFC 1950  1951  1952

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Until now  I was using cmd processes in order to extract an  iso file  copy it into a temporary path from server and extracted on a usb stick  Recently I ve found that this is working perfectly with  iso s that are less than 10Gb  For a iso like 29Gb this method gets stuck somehow       public void ExtractArchive                 try                        try                               Directory Delete copyISOLocation OutputPath  true                              catch  Exception e  when  e is IOException    e is UnauthorizedAccessException                                           Process cmd   new Process                cmd StartInfo FileName    cmd exe               cmd StartInfo RedirectStandardInput   true              cmd StartInfo RedirectStandardOutput   true              cmd StartInfo CreateNoWindow   true              cmd StartInfo UseShellExecute   false              cmd StartInfo WindowStyle   ProcessWindowStyle Normal                 stackoverflow             cmd StartInfo Arguments    -R                cmd Disposed     sender  args    gt                    Console WriteLine  CMD Process disposed                               cmd Exited     sender  args    gt                    Console WriteLine  CMD Process exited                               cmd ErrorDataReceived     sender  args    gt                    Console WriteLine  CMD Process error data received                    Console WriteLine args Data                              cmd OutputDataReceived     sender  args    gt                    Console WriteLine  CMD Process Output data received                    Console WriteLine args Data                                 stackoverflow               cmd Start                 cmd StandardInput WriteLine  C                   Console WriteLine cmd StandardOutput Read                 cmd StandardInput Flush                 cmd StandardInput WriteLine  cd C     Program Files  x86     7-Zip                    Console WriteLine cmd StandardOutput ReadToEnd                 cmd StandardInput Flush                 cmd StandardInput WriteLine string Format  7z exe x -o 0   1    copyISOLocation OutputPath  copyISOLocation TempIsoPath                  Console WriteLine cmd StandardOutput ReadToEnd                 cmd StandardInput Flush                cmd StandardInput Close                cmd WaitForExit                Console WriteLine cmd StandardOutput ReadToEnd                 Console WriteLine cmd StandardError ReadToEnd

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From Embed Ressources   using  Stream  pluginZipResourceStream   Assembly GetExecutingAssembly   GetManifestResourceStream programName          filename zip          using  ZipArchive zip   new ZipArchive  pluginZipResourceStream                 zip ExtractToDirectory Application StartupPath

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This will do it System IO Compression ZipFile ExtractToDirectory ZipName  ExtractToPath

[c#] Unzip files programmatically in .net

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