Write Method

GZipStream.Write Method (Byte[], Int32, Int32)


Writes compressed bytes to the underlying stream from the specified byte array.

Namespace:   System.IO.Compression
Assembly:  System (in System.dll)

public override void Write(
	byte[] array,
	int offset,
	int count


Type: System.Byte[]

The buffer that contains the data to compress.

Type: System.Int32

The byte offset in array from which the bytes will be read.

Type: System.Int32

The maximum number of bytes to write.

Exception Condition

The write operation cannot be performed because the stream is closed.

The write operation might not occur immediately but is buffered until the buffer size is reached or until the Flush or Close method is called.

The following example shows how to compress and decompress bytes by using the Read and Write methods.

using System;
using System.Text;
using System.IO;
using System.IO.Compression;

namespace ExampleConsoleApplication
    class Program
        static void Main(string[] args)
            UnicodeEncoding uniEncode = new UnicodeEncoding();

            byte[] bytesToCompress = uniEncode.GetBytes("example text to compress and decompress");
            Console.WriteLine("starting with: " + uniEncode.GetString(bytesToCompress));

            using (FileStream fileToCompress = File.Create("examplefile.gz"))
                using (GZipStream compressionStream = new GZipStream(fileToCompress, CompressionMode.Compress))
                    compressionStream.Write(bytesToCompress, 0, bytesToCompress.Length);

            byte[] decompressedBytes = new byte[bytesToCompress.Length];
            using (FileStream fileToDecompress = File.Open("examplefile.gz", FileMode.Open))
                using (GZipStream decompressionStream = new GZipStream(fileToDecompress, CompressionMode.Decompress))
                    decompressionStream.Read(decompressedBytes, 0, bytesToCompress.Length);

            Console.WriteLine("ending with: " + uniEncode.GetString(decompressedBytes));

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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