Visual Basic 6.0

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. Visual Basic 6.0

Dim success As Long
success = 0

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

Dim sbCompressedBase64 As New ChilkatStringBuilder

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

compress.FirstChunk = 1
compress.LastChunk = 0

Dim bdCompressed As New ChilkatBinData
Dim sbUncompressedChunk As New ChilkatStringBuilder

Dim i As Long
For i = 0 To 24
    If (i = 24) Then
        compress.LastChunk = 1
    End If

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

    success = compress.CompressSb(sbUncompressedChunk,bdCompressed)

    compress.FirstChunk = 0
Next

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

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