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How to compress/decompress directories using GZipStream

, 1 Feb 2012
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My alternative is to rather use a tried and tested compression api. It's simpler to use and you don't have to spend time developing helper methods to zip and unzip files.http://dotnetzip.codeplex.com/[^]Create a zip file using (ZipFile zip = new ZipFile()) { ...
My alternative is to rather use a tried and tested compression api. It's simpler to use and you don't have to spend time developing helper methods to zip and unzip files.
http://dotnetzip.codeplex.com/[^]
 
Create a zip file
 
 using (ZipFile zip = new ZipFile())
  {
    zip.AddFile("ReadMe.txt");
    zip.AddFile("7440-N49th.png");
    zip.AddFile("2008_Annual_Report.pdf");        
    zip.Save("Archive.zip");
  }
 
Extract a zip file
 
private void MyExtract()
  {
      string zipToUnpack = "C1P3SML.zip";
      string unpackDirectory = "Extracted Files";
      using (ZipFile zip1 = ZipFile.Read(zipToUnpack))
      {
          // here, we extract every entry, but we could extract conditionally
          // based on entry name, size, date, checkbox status, etc.  
          foreach (ZipEntry e in zip1)
          {
            e.Extract(unpackDirectory, ExtractExistingFileAction.OverwriteSilently);
          }
       }
    }
 
Create a downloadable zip within asp.net
 
public void btnGo_Click (Object sender, EventArgs e)
{
  Response.Clear();
  Response.BufferOutput= false;  // for large files
  String ReadmeText= "This is a zip file dynamically generated at " + System.DateTime.Now.ToString("G");
  string filename = System.IO.Path.GetFileName(ListOfFiles.SelectedItem.Text) + ".zip";
  Response.ContentType = "application/zip";
  Response.AddHeader("content-disposition", "filename=" + filename);
  
  using (ZipFile zip = new ZipFile()) 
  {
    zip.AddFile(ListOfFiles.SelectedItem.Text, "files");
    zip.AddEntry("Readme.txt", "", ReadmeText);
    zip.Save(Response.OutputStream);
  }
  Response.Close();
}
 
as well as various other uses.

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

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About the Author

Dean Oliver
Software Developer BBD Johannesburg
South Africa South Africa
Bsc (Hons) Business Information Systems.
MCTS: Web Applications Development with Microsoft .NET Framework 4
MCTS: Windows Communication Foundation Development with Microsoft .NET Framework 4
MCTS: Accessing Data with Microsoft .NET Framework 4
Microsoft Certified Professional Developer Certification.

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