(PowerShell) Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

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This example demonstrates how to iterate through all entries in a ZIP archive using:

• Zip.EntryAt to obtain the first entry
• ZipEntry.GetNext to advance through the remaining entries

The example prints each ZIP entry's stored filename and whether the entry is a file or directory.

This approach is useful when sequentially processing ZIP entries without repeatedly calling EntryAt by index.

Suppose the ZIP archive contains:

docs/
docs/readme.txt
images/logo.png
hello.txt

The example iterates through each entry in the order stored within the ZIP archive.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$zip = New-Object Chilkat.Zip

# Open an existing ZIP archive.
$success = $zip.OpenZip("c:/temp/example.zip")
if ($success -eq $false) {
    $($zip.LastErrorText)
    exit
}

# A ZIP archive may contain zero entries.
if ($zip.NumEntries -eq 0) {

    $("The ZIP archive is empty.")

    $zip.CloseZip()
    exit
}

# ------------------------------------------------------------
# Get the first ZIP entry.
# 
# EntryAt(0,entry) initializes the ZipEntry object so that
# it represents the first entry in the ZIP archive.
# 
$entry = New-Object Chilkat.ZipEntry

$success = $zip.EntryAt(0,$entry)
if ($success -eq $false) {
    $($zip.LastErrorText)
    exit
}

# ------------------------------------------------------------
# Iterate through all ZIP entries.
# 
# GetNext updates the same ZipEntry object so that it
# represents the next entry in the ZIP archive.
# 
while (($success -eq $true)) {

    if ($entry.IsDirectory -eq $true) {

        $("[Directory] " + $entry.FileName)

    }
    else {

        $("[File] " + $entry.FileName)
    }

    # Advance to the next entry.
    $success = $entry.GetNext()
}

$zip.CloseZip()

$("Done.")