VB.NET

Compress String Feed to Base64

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64. 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.

Dim sbCompressedBase64 As New Chilkat.StringBuilder

Dim compress As New Chilkat.Compression
compress.Algorithm = "deflate"
compress.Charset = "utf-8"
compress.EncodingMode = "base64"

compress.FirstChunk = True
compress.LastChunk = False

Dim bdCompressed As New Chilkat.BinData
Dim sbUncompressedChunk As New Chilkat.StringBuilder

Dim i As Integer
For i = 0 To 24
    If (i = 24) Then
        compress.LastChunk = True
    End If


    sbUncompressedChunk.Clear()
    sbUncompressedChunk.AppendInt(i)
    sbUncompressedChunk.Append(": This is a line of data to be compressed..." & vbCrLf)

    compress.CompressSb(sbUncompressedChunk,bdCompressed)

    compress.FirstChunk = False
Next

Debug.WriteLine("The base64 encoded compressed text:")
Debug.WriteLine(bdCompressed.GetEncoded("base64"))

' Decompress in one call:
Dim originalText As String = compress.DecompressStringENC(bdCompressed.GetEncoded("base64"))
Debug.WriteLine(originalText)