The Compression Class

That's new and extremly unique !!! The compression class in .net Frame Work 2.0
Add the class, ready to use !

Imports System
Imports System.Text
Imports System.IO
Imports System.IO.Compression

Module Compress
Public Function StringCompress( _
ByVal originalText As String) As Byte( )
' ----- Generate a compressed version of a string.
' First, convert the string to a byte array.
Dim workBytes( ) As Byte = _
Encoding.UTF8.GetBytes(originalText)

' ----- Bytes will flow through a memory stream.
Dim memoryStream As New MemoryStream( )

' ----- Use the newly created memory stream for the
' compressed data.
Dim zipStream As New GZipStream(memoryStream, _
CompressionMode.Compress, True)
zipStream.Write(workBytes, 0, workBytes.Length)
zipStream.Flush( )

' ----- Close the compression stream.
zipStream.Close( )

' ----- Return the compressed bytes.
Return memoryStream.ToArray
End Function

Public Function BytesDecompress( _
ByVal compressed( ) As Byte) As String
' ----- Uncompress a previously compressed string.
' Extract the length for the decompressed string.
Dim lastFour(3) As Byte
Array.Copy(compressed, compressed.Length - 4, _
lastFour, 0, 4)
Dim bufferLength As Integer = _
BitConverter.ToInt32(lastFour, 0)

' ----- Create an uncompressed bytes buffer.
Dim buffer(bufferLength - 1) As Byte

' ----- Bytes will flow through a memory stream.
Dim memoryStream As New MemoryStream(compressed)

' ----- Create the decompression stream.
Dim decompressedStream As New GZipStream( _
memoryStream, CompressionMode.Decompress, True)

' ----- Read and decompress the data into the buffer.
decompressedStream.Read(buffer, 0, bufferLength)

' ----- Convert the bytes to a string.
Return Encoding.UTF8.GetString(buffer)
End Function

Public Sub FileCompress(ByVal sourceFile As String, _
ByVal destinationFile As String)
' ----- Decompress a previously compressed string.
' First, create the input file stream.
Dim sourceStream As New FileStream( _
sourceFile, FileMode.Open, FileAccess.Read)

' ----- Create the output file stream.
Dim destinationStream As New FileStream( _
destinationFile, FileMode.Create, FileAccess.Write)

' ----- Bytes will be processed by a compression
' stream.
Dim compressedStream As New GZipStream( _
destinationStream, CompressionMode.Compress, True)

' ----- Process bytes from one file into the other.
Const BlockSize As Integer = 4096
Dim buffer(BlockSize) As Byte
Dim bytesRead As Integer
Do
bytesRead = sourceStream.Read(buffer, 0, BlockSize)
If (bytesRead = 0) Then Exit Do
compressedStream.Write(buffer, 0, bytesRead)
Loop

' ----- Close all the streams.
sourceStream.Close( )
compressedStream.Close( )
destinationStream.Close( )
End Sub

Public Sub FileDecompress(ByVal sourceFile As String, _
ByVal destinationFile As String)
' ----- Compress the entire contents of a file, and
' store it in a new file. First, get the files
' as streams.
Dim sourceStream As New FileStream( _
sourceFile, FileMode.Open, FileAccess.Read)
Dim destinationStream As New FileStream( _
destinationFile, FileMode.Create, FileAccess.Write)

' ----- Bytes will be processed through a
' decompression stream.
Dim decompressedStream As New GZipStream( _
sourceStream, CompressionMode.Decompress, True)

' ----- Process bytes from one file into the other.
Const BlockSize As Integer = 4096
Dim buffer(BlockSize) As Byte
Dim bytesRead As Integer
Do
bytesRead = decompressedStream.Read(buffer, _
0, BlockSize)
If (bytesRead = 0) Then Exit Do
destinationStream.Write(buffer, 0, bytesRead)
Loop

' ----- Close all the streams.
sourceStream.Close( )
decompressedStream.Close( )
destinationStream.Close( )
End Sub
End Module