VBScript

Append Dir Tree to Existing Zip w/out Rewriting Entire Zip

See more Zip Examples

Demonstrates how to use the QuickAppend method to append a directory tree to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

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

set zip = CreateObject("Chilkat.Zip")

' The NewZip method only initializes the Zip object -- it does
' not create or write a .zip file.
success = zip.NewZip("notUsed.zip")
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

' Add a references to all files in a directory tree.
' Note: this does not read or compress the file contents --
' it simply adds file references to the zip object.
recurse = 1
success = zip.AppendFiles("c:/temp/abc123/*",recurse)
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

' Appends the contents of the zip object to the preExisting.zip
' zip archive.  preExisting.zip is opened, and the files
' referenced by this zip object are streamed in, compressed,
' and appended to the end of the archive.
success = zip.QuickAppend("preExisting.zip")
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Success!")

' Note: Additional files, directory trees, or in-memory data
' can be appended by calling AddFile, AppendFiles,
' AddString, AddBd, AddSb, etc. multiple times.
' Whatever files and/or in-memory data that are referenced by
' this zip object will be appended to preExisting.zip when
' QuickAppend is called

outFile.Close