To compress and decompress using GZip in C# and VB.NET you can use the Following snippet.
Samples
Sample C#
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public static byte[] DecompressGZip(byte[] bytesToDecompress) { using (GZipStream stream = new GZipStream(new MemoryStream(bytesToDecompress), CompressionMode.Decompress)) { const int size = 4096; byte[] buffer = new byte[size]; using (MemoryStream memoryStream = new MemoryStream()) { int count; do { count = stream.Read(buffer, 0, size); if (count > 0) { memoryStream.Write(buffer, 0, count); } } while (count > 0); return memoryStream.ToArray(); } } } public static byte[] CompressGZip(string input, Encoding encoding = null) { encoding = encoding ?? Encoding.Unicode; byte[] bytes = encoding.GetBytes(input); using (MemoryStream stream = new MemoryStream()) { using (GZipStream zipStream = new GZipStream(stream, CompressionMode.Compress)) { zipStream.Write(bytes, 0, bytes.Length); return stream.ToArray(); } } } |
Sample VB.NET
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Public Function DecompressGZip(bytesToDecompress As Byte()) As Byte() Using stream As New GZipStream(New MemoryStream(bytesToDecompress), CompressionMode.Decompress) Const size As Integer = 4096 Dim buffer As Byte() = New Byte(size - 1) {} Using memoryStream As New MemoryStream() Dim count As Integer Do count = stream.Read(buffer, 0, size) If count > 0 Then memoryStream.Write(buffer, 0, count) End If Loop While count > 0 Return memoryStream.ToArray() End Using End Using End Function Public Function CompressGZip(input As String, Optional encoding As Encoding = Nothing) As Byte() encoding = If(encoding, Encoding.Unicode) Dim bytes As Byte() = encoding.GetBytes(input) Using stream As New MemoryStream() Using zipStream As New GZipStream(stream, CompressionMode.Compress) zipStream.Write(bytes, 0, bytes.Length) Return stream.ToArray() End Using End Using End Function |
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