PowerBuilder

Compress and Decompress a String

See more Compression Examples

Demonstrates how to compress and decompress a string. PowerBuilder

integer li_rc
long li_Success
oleobject loo_Sb
long i
oleobject loo_Compress
string ls_CompressedBase64
string ls_DecompressedString

li_Success = 0

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

loo_Sb = create oleobject
li_rc = loo_Sb.ConnectToNewObject("Chilkat.StringBuilder")
if li_rc < 0 then
    destroy loo_Sb
    MessageBox("Error","Connecting to COM object failed")
    return
end if

for i = 1 to 20
    loo_Sb.Append("This is the original uncompressed string.~r~n")
next

loo_Compress = create oleobject
li_rc = loo_Compress.ConnectToNewObject("Chilkat.Compression")

loo_Compress.Algorithm = "deflate"
//  Indicate that the utf-8 byte representation of the string should be compressed.
loo_Compress.Charset = "utf-8"

loo_CompressedBytes = loo_Compress.CompressString(loo_Sb.GetAsString())

//  If the compressed data is desired in string format, then get the base64 representation of the bytes.
loo_Compress.EncodingMode = "base64"
ls_CompressedBase64 = loo_Compress.CompressStringENC(loo_Sb.GetAsString())
Write-Debug "Compressed Bytes as Base64: " + ls_CompressedBase64

//  Now decompress...
ls_DecompressedString = loo_Compress.DecompressString(loo_CompressedBytes)
Write-Debug "The original string after decompressing from binary compressed data:"
Write-Debug ls_DecompressedString

//  To decompress from Base64...
loo_Compress.EncodingMode = "base64"
ls_DecompressedString = loo_Compress.DecompressStringENC(ls_CompressedBase64)
Write-Debug "The original string after decompressing from Base64:"
Write-Debug ls_DecompressedString


destroy loo_Sb
destroy loo_Compress