VB.NET

Compress Bytes to Base64 (or any other encoding)

See more Compression Examples

Compresses bytes to base64 or any other encoding. Also decompress to return the original. VB.NET

Dim success As Boolean = False

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' First create some binary data to compress.
Dim binData As New Chilkat.BinData

Dim i As Integer
For i = 1 To 16
    binData.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex")
Next

Dim compress As New Chilkat.Compression
compress.Algorithm = "deflate"
compress.EncodingMode = "base64"

Dim uncompressedBytes() As Byte
uncompressedBytes = binData.GetBinary()

' Compress and return the compressed bytes in base64 format.
Dim compressedBase64 As String = compress.CompressBytesENC(uncompressedBytes)
Debug.WriteLine("compressed and base64 encoded: " & compressedBase64)

' Compress and return in hex format:
compress.EncodingMode = "hex"
Dim compressedHex As String = compress.CompressBytesENC(uncompressedBytes)
Debug.WriteLine("compressed and hex encoded: " & compressedHex)

' Now decompress..
Dim binData2 As New Chilkat.BinData

' Decompress the base64..
compress.EncodingMode = "base64"
uncompressedBytes = compress.DecompressBytesENC(compressedBase64)
binData2.AppendBinary(uncompressedBytes)
' Show the uncompressed bytes in hex format:
Debug.WriteLine(binData2.GetEncoded("hex"))
Debug.WriteLine("--")

' Decompress the hex..
compress.EncodingMode = "hex"
uncompressedBytes = compress.DecompressBytesENC(compressedHex)
binData2.Clear()
binData2.AppendBinary(uncompressedBytes)
' Show the uncompressed bytes in hex format:
Debug.WriteLine(binData2.GetEncoded("hex"))
Debug.WriteLine("--")