The .NET Framework 4.5 Gets ZIP: Listing 1

Creating a compressed file with System.IO.Packaging.ZIPPackage.

'Get list of files in directory tree from FolderPath (Does not capture an empty folder)
  Dim files() = IO.Directory.GetFiles(FolderPath, "*.*", SearchOption.AllDirectories)
  If FolderPath.EndsWith("\") Then FolderPath = FolderPath.Substring(0, FolderPath.Length - 1)
  Using Zip As Package = ZipPackage.Open(ZipFullFilename, FileMode.OpenOrCreate, FileAccess.ReadWrite)
    For Each item In files
      Dim relFile = item.Substring(FolderPath.Length)
      relFile = relFile.Replace(" "c, "_"c).Replace("\", "/")
      If relFile.StartsWith("/") = False Then relFile = "/" & relFile
      Dim filePart As PackagePart = Zip.CreatePart(New Uri(relFile), _
                Net.Mime.MediaTypeNames.Application.ZIP, Optimization)
      'Read the file into a byte array that can be written to Zip stream
      Dim arrBuffer As Byte() = File.ReadAllBytes(item)
      filePart.GetStream().Write(arrBuffer, 0, arrBuffer.Length)
  End Using

About the Author

Joe Kunk is a Microsoft MVP in Visual Basic, three-time president of the Greater Lansing User Group for .NET, and developer for Dart Container Corporation of Mason, Michigan. He's been developing software for over 30 years and has worked in the education, government, financial and manufacturing industries. Kunk's co-authored the book "Professional DevExpress ASP.NET Controls" (Wrox Programmer to Programmer, 2009). He can be reached via email at [email protected].

comments powered by Disqus


  • Visual Studio 'Tea & Technology' Video Miniseries Starts Next Week

    The goal of the miniseries is to provide an insider's snapshot look at some of the people who contribute to shaping the Visual Studio IDE every day.

  • Microsoft Releases OpenJDK 21 Build for Java Jockeys

    Microsoft today announced its "Microsoft Build of OpenJDK 21," taking advantage of new features and functionality in Java 21.

  • 'Dev Home' Update Leads Developer Goodies in AI-Powered Windows 11 Update

    Along with today's new AI-powered Windows 11 update come new goodies for developers, including a new edition of Dev Home, a preview offering described as a "control center" providing coding-focused features and functionality.

  • Community Dev Gives VS Code Python Some YAPF

    The latest update to Python in Visual Studio Code includes a new extension for Python formatting that was contributed by a member of the open source community.

Subscribe on YouTube