Compress and decompress strings in C# | |||
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I modified the methods from Papenoo pa so they handled strings in stead of byte arrays. using System.IO.Compression; using System.Text; using System.IO; public static string Compress(string text) { byte[] buffer = Encoding.UTF8.GetBytes(text); MemoryStream ms = new MemoryStream(); using (GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true)) { zip.Write(buffer, 0, buffer.Length); } ms.Position = 0; MemoryStream outStream = new MemoryStream(); byte[] compressed = new byte[ms.Length]; ms.Read(compressed, 0, compressed.Length); byte[] gzBuffer = new byte[compressed.Length + 4]; System.Buffer.BlockCopy(compressed, 0, gzBuffer, 4, compressed.Length); System.Buffer.BlockCopy(BitConverter.GetBytes(buffer.Length), 0, gzBuffer, 0, 4); return Convert.ToBase64String (gzBuffer); } public static string Decompress(string compressedText) { byte[] gzBuffer = Convert.FromBase64String(compressedText); using (MemoryStream ms = new MemoryStream()) { int msgLength = BitConverter.ToInt32(gzBuffer, 0); ms.Write(gzBuffer, 4, gzBuffer.Length - 4); byte[] buffer = new byte[msgLength]; ms.Position = 0; using (GZipStream zip = new GZipStream(ms, CompressionMode.Decompress)) { zip.Read(buffer, 0, buffer.Length); } return Encoding.UTF8.GetString(buffer); } } The strings need to be longer than 3-400 characters; otherwise the compression rate is not good enough. Tags: Base64Encode C# EnableVisualStyles How to convert UTF8 string to Base64 string UTF8Decode UTF8Encode | |||
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