C# - Gzip Uncompress and Compress Example using System.IO.Compression.GZipStream

Post date: May 11, 2012 8:44:31 AM

Sometimes it is a good idea to compress some data that you manage in a system.

If you are managing compress data in the system it will end up as arrays of bytes. To make it easier to work with it you can convert it to a string using


and then back to byte array using


using System.Text;using System.IO;using System.IO.Compression;using System;namespace Decrompressor { public class GZipManager { public static string Deccompress(byte[] byteArray) { StringBuilder uncompressed = new StringBuilder(); using (MemoryStream memoryStream = new MemoryStream(byteArray)) { using (GZipStream gZipStream = new GZipStream(memoryStream, CompressionMode.Decompress)) { byte[] buffer = new byte[1024]; int readBytes; while ((readBytes = gZipStream.Read(buffer, 0, buffer.Length)) != 0) { for (int i = 0; i < readBytes; i++) uncompressed.Append((char)buffer[i]); } } return uncompressed.ToString(); } } public static byte[] Compress(string text, Encoding encoding = null) { if (string.IsNullOrEmpty(text)) throw new ArgumentException("text cannot be null nor empty"); encoding = encoding ?? System.Text.Encoding.Unicode; byte[] inputBytes = encoding.GetBytes(text); using (MemoryStream resultStream = new MemoryStream()) { using (GZipStream gZipStream = new GZipStream(resultStream, CompressionMode.Compress)) { gZipStream.Write(inputBytes, 0, inputBytes.Length); return resultStream.ToArray(); } } } }}