(VB.NET) Compress Bytes

Demonstrates how to compress binary data.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim fac As New Chilkat.FileAccess

Dim fileBytes() As Byte
fileBytes = fac.ReadEntireFile("qa_data/bmp/big.bmp")
If (fac.LastMethodSuccess <> True) Then
    Debug.WriteLine(fac.LastErrorText)
    Exit Sub
End If


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

Dim compressedBytes() As Byte
compressedBytes = compress.CompressBytes(fileBytes)
If (compress.LastMethodSuccess <> True) Then
    Debug.WriteLine(compress.LastErrorText)
    Exit Sub
End If


Dim success As Boolean = fac.WriteEntireFile("qa_output/compressedBmp.dat",compressedBytes)
If (fac.LastMethodSuccess <> True) Then
    Debug.WriteLine(fac.LastErrorText)
    Exit Sub
End If