C# DeflateStream DeflateStream(Stream, CompressionMode)

Description

DeflateStream DeflateStream(Stream, CompressionMode) Initializes a new instance of the DeflateStream class by using the specified stream and compression mode.

Syntax

DeflateStream.DeflateStream(Stream, CompressionMode) has the following syntax.


public DeflateStream(
  Stream stream,
  CompressionMode mode
)

Parameters

DeflateStream.DeflateStream(Stream, CompressionMode) has the following parameters.

  • stream - The stream to compress or decompress.
  • mode - One of the enumeration values that indicates whether to compress or decompress the stream.

Example

The following example shows how to use the DeflateStream class to compress and decompress a file.


// w w  w.j  a  va 2  s . c  om
using System;
using System.IO;
using System.IO.Compression;

public class Program
{
    public static void Main()
    {
        string directoryPath = @"c:\users\";

        DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);

        foreach (FileInfo fileToCompress in directorySelected.GetFiles())
        {
            Compress(fileToCompress);
      }

        foreach (FileInfo fileToDecompress in directorySelected.GetFiles("*.z"))
        {
            Decompress(fileToDecompress);
        }
    }

    public static void Compress(FileInfo fileToCompress)
    {
        using (FileStream originalFileStream = fileToCompress.OpenRead())
        {
            if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden)
                != FileAttributes.Hidden & fileToCompress.Extension != ".z")
            {
                using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".z"))
                {
                    using (DeflateStream compressionStream = new DeflateStream(compressedFileStream, CompressionMode.Compress))
                    {
                        originalFileStream.CopyTo(compressionStream);

                        Console.WriteLine("Compressed {0} from {1} to {2} bytes.",
                          fileToCompress.Name, fileToCompress.Length.ToString(), compressedFileStream.Length.ToString());
                    }
                }
            }
        }
    }

    public static void Decompress(FileInfo fileToDecompress)
    {
        using (FileStream originalFileStream = fileToDecompress.OpenRead())
        {
            string currentFileName = fileToDecompress.FullName;
            string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);

            using (FileStream decompressedFileStream = File.Create(newFileName))
          {
                using (DeflateStream decompressionStream = new DeflateStream(originalFileStream, CompressionMode.Decompress))
              {
                    decompressionStream.CopyTo(decompressedFileStream);
                    Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);
              }
          }
        }
    }
}




















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DeflateStream
GZipStream
ZipArchive
ZipArchiveEntry
ZipFile
ZipFileExtensions