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Unzip a Text File Entry into a StringBuilder Using ZipEntry.UnzipToSb

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This example demonstrates how to use the ZipEntry.UnzipToSb method to inflate a text file entry directly into a StringBuilder object.

The ZIP entry is uncompressed entirely in memory and appended to the StringBuilder without creating a temporary file on disk.

This is useful when:

• Processing text files directly in memory
• Avoiding temporary filesystem files
• Reading configuration files, JSON, XML, CSV, or source code from ZIP archives
• Automatically converting line endings while inflating the text

The srcCharset argument specifies how the uncompressed bytes should be interpreted, such as:

• utf-8
• utf-16
• windows-1252

The lineEndingBehavior argument controls line-ending conversion:

• 0 — Leave line endings unchanged
• 1 — Convert all line endings to bare LF
• 2 — Convert all line endings to CRLF

Suppose the ZIP archive contains:

config/settings.json

The example inflates the JSON file directly into a StringBuilder.

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Local $bSuccess = False

$oZip = ObjCreate("Chilkat.Zip")

; Open an existing ZIP archive.
$bSuccess = $oZip.OpenZip("qa_data/zips/configFiles.zip")
If ($bSuccess = False) Then
    ConsoleWrite($oZip.LastErrorText & @CRLF)
    Exit
EndIf

; Locate the JSON file entry within the ZIP archive.
$oEntry = ObjCreate("Chilkat.ZipEntry")

$bSuccess = $oZip.EntryOf("config/settings.json",$oEntry)
If ($bSuccess = False) Then
    ConsoleWrite("ZIP entry not found." & @CRLF)
    $oZip.CloseZip 
    Exit
EndIf

; ------------------------------------------------------------
; Inflate the ZIP entry directly into a StringBuilder.
; 
; The uncompressed text is appended to the StringBuilder.
; 
$oSb = ObjCreate("Chilkat.StringBuilder")

; Leave line endings unchanged.
Local $iLineEndingBehavior = 0

; Interpret the uncompressed bytes as UTF-8 text.
Local $srcCharset = "utf-8"

$bSuccess = $oEntry.UnzipToSb($iLineEndingBehavior,$srcCharset,$oSb)
If ($bSuccess = False) Then
    ConsoleWrite($oEntry.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Uncompressed text:" & @CRLF)
ConsoleWrite("" & @CRLF)
ConsoleWrite($oSb.GetAsString() & @CRLF)

$oZip.CloseZip 

ConsoleWrite("Done." & @CRLF)