(PowerShell) Extract a Single ZIP Entry While Preserving Its Stored Path

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This example demonstrates how to use the ZipEntry.Extract method to extract a single entry from a ZIP archive.

The example first creates a ZIP archive containing a text file. It then re-opens the ZIP, finds the entry, and extracts it to a base directory.

The Extract method uses the relative path stored within the ZIP entry. Any required subdirectories are created automatically beneath the specified base directory.

Note: This example requires Chilkat v11.0.0 or greater.

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

$success = $false

# ------------------------------------------------------------
# First create a sample ZIP archive containing a small text file.

$zip = New-Object Chilkat.Zip

$success = $zip.NewZip("c:/temp/sampleText.zip")
if ($success -eq $false) {
    $($zip.LastErrorText)
    exit
}

# Add a small text file from memory.
$success = $zip.AddString("myApp/docs/hello.txt","Hello from a ZIP entry!","utf-8")
if ($success -eq $false) {
    $($zip.LastErrorText)
    exit
}

# Write the ZIP archive to disk and close it.
$success = $zip.WriteZipAndClose()
if ($success -eq $false) {
    $($zip.LastErrorText)
    exit
}

# ------------------------------------------------------------
# Now open the ZIP archive we just created.

$zip2 = New-Object Chilkat.Zip

$success = $zip2.OpenZip("c:/temp/sampleText.zip")
if ($success -eq $false) {
    $($zip2.LastErrorText)
    exit
}

# Find the entry by its stored ZIP path.
$entry = New-Object Chilkat.ZipEntry

$success = $zip2.EntryOf("myApp/docs/hello.txt",$entry)

if ($success -eq $false) {
    $("Entry not found.")
    exit
}

# Extract this single entry to the base directory:
# 
#     c:/temp/extracted
# 
# Because the entry's stored path is:
# 
#     myApp/docs/hello.txt
# 
# the file will be extracted to:
# 
#     qa_output/extracted/myApp/docs/hello.txt
# 
# The required subdirectories are created automatically.
$success = $entry.Extract("c:/temp/extracted")
if ($success -eq $false) {
    $($entry.LastErrorText)
    exit
}

$zip2.CloseZip()

$("Entry extracted successfully.")