Initializes a new instance of the ZipArchive class from the specified stream. Using archive As ZipArchive = ZipFile.Open(zipPath, ZipArchiveMode.Update)Īrchive.CreateEntryFromFile(newFile, "NewEntry.txt", CompressionLevel.Fastest) String zipPath = extractPath = newFile = (ZipArchive archive = ZipFile.Open(zipPath, ZipArchiveMode.Update))Īrchive.CreateEntryFromFile(newFile, "NewEntry.txt") ĭim zipPath As String = "c:\users\exampleuser\end.zip"ĭim extractPath As String = "c:\users\exampleuser\extract"ĭim newFile As String = "c:\users\exampleuser\NewFile.txt" You must reference the System.IO.Compression.FileSystem assembly to execute the code. The third example shows how to use extension methods to create a new entry in a zip archive from an existing file and extract the archive contents. If destinationPath.StartsWith(extractPath, StringComparison.Ordinal) Then ' Ordinal match is safest, case-sensitive volumes can be mounted within volumes that ' Gets the full path to ensure that relative segments are removed.ĭim destinationPath As String = Path.GetFullPath(Path.Combine(extractPath, entry.FullName)) If (".txt", StringComparison.OrdinalIgnoreCase) Then Using archive As ZipArchive = ZipFile.OpenRead(zipPath)įor Each entry As ZipArchiveEntry In archive.Entries If Not extractPath.EndsWith((), StringComparison.Ordinal) ThenĮxtractPath = Path.DirectorySeparatorChar ' Without this, a malicious zip file could try to traverse outside of the expected ' Ensures that the last character on the extraction path If (destinationPath.StartsWith(extractPath, StringComparison.Ordinal))Ĭonsole.WriteLine("Provide path where to extract the zip file:")ĭim extractPath As String = Console.ReadLine()ĮxtractPath = Path.GetFullPath(extractPath) Ordinal match is safest, case-sensitive volumes can be mounted within volumes that String destinationPath = Path.GetFullPath(Path.Combine(extractPath, entry.FullName)) Gets the full path to ensure that relative segments are removed. If ((".txt", StringComparison.OrdinalIgnoreCase)) Using (ZipArchive archive = ZipFile.OpenRead(zipPath))įoreach (ZipArchiveEntry entry in archive.Entries) If (!extractPath.EndsWith((), StringComparison.Ordinal))ĮxtractPath = Path.DirectorySeparatorChar Without this, a malicious zip file could try to traverse outside of the expected Ensures that the last character on the extraction path String zipPath = path where to extract the zip file:") ĮxtractPath = Path.GetFullPath(extractPath) The following example shows how to open a zip archive and iterate through the collection of entries. Writer.WriteLine("Information about this package.") Using writer As StreamWriter = New StreamWriter(readmeEntry.Open()) Using archive As ZipArchive = New ZipArchive(zipToOpen, ZipArchiveMode.Update)ĭim readmeEntry As ZipArchiveEntry = archive.CreateEntry("Readme.txt") Using zipToOpen As FileStream = New FileStream("c:\users\exampleuser\release.zip", FileMode.Open) Using (StreamWriter writer = new StreamWriter(readmeEntry.Open())) ZipArchiveEntry readmeEntry = archive.CreateEntry("Readme.txt") Using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update)) Using (FileStream zipToOpen = new FileMode.Open)) The first example shows how to create a new entry and write to it by using a stream. In Windows 8.x Store apps, you can compress and decompress files by using the DeflateStream or GZipStream class, or you can use the Windows Runtime types Compressor and Decompressor. The System.IO.Compression.FileSystem assembly is not available for Windows 8.x Store apps. These extension methods enable you to compress and decompress the contents of the entry to a file. If you reference the System.IO.Compression.FileSystem assembly in your project, you can access four extension methods (from the ZipFileExtensions class) for the ZipArchive class: CreateEntryFromFile(ZipArchive, String, String), CreateEntryFromFile(ZipArchive, String, String, CompressionLevel), ExtractToDirectory(ZipArchive, String), and ExtractToDirectory(ZipArchive, String, Boolean) (available in. For example, creating a new entry with a relative path of AddedFolder\NewFile.txt creates a compressed text file in a directory named AddedFolder. You include the relative path of the new entry within the zip package. The CreateEntry method enables you to specify a directory hierarchy when adding the entry. When you create a new entry, the file is compressed and added to the zip package. Open a stream to a single file contained in a zip archive Retrieve all the files from a zip archive ToĮxtract the contents of a zip archive to a directory The methods for manipulating zip archives and their file entries are spread across three classes: ZipFile, ZipArchive, and ZipArchiveEntry.
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