Compress-Archive Not Working?

johnmsch 

Hey, John.

Yes, you certainly can manipulate an archive, however, you have to do so from .NET. Here's a very basic example, which you can easily extend as it's a pretty simple set of classes to work with.

Example

# Add the required .NET library reference.
Add-Type -AssemblyName "System.IO.Compression.FileSystem";

# Open the Zip file.
$Archive = [System.IO.Compression.ZipFile]::Open("<full path to your Zip file>", [System.IO.Compression.ZipArchiveMode]::Update);

# Delete the first entry.
$Archive.Entries[0].Delete();

# Finish up properly by disposing the $Archive object.
$Archive.Dispose();

In a real-world context, you'd most likely enumerate the Entries collection and make smarter decisions based on file size, type, etc.

References

• ZipFile Class (System.IO.Compression) | Microsoft Learn
• ZipArchive Class (System.IO.Compression) | Microsoft Learn
• ZipArchiveEntry Class (System.IO.Compression) | Microsoft Learn

Cheers,

Lain