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);
}
}
}
}
}