Remove files from .zip file with Powershell

Question

I am going to write a Powershell script to remove files from a .zip file. In my .zip file, I have test.txt (latest) test1.txt (older) test2.txt .... testN.txt (oldest)

Answer 1

Adopting this VBScript solution:

$zipfile = 'C:\path\to\your.zip'
$files   = 'some.file', 'other.file', ...
$dst     = 'C:\some\folder'

$app = New-Object -COM 'Shell.Application'
$app.NameSpace($zipfile).Items() | ? { $files -contains $_.Name } | % {
  $app.Namespace($dst).MoveHere($_)
  Remove-Item (Join-Path $dst $_.Name)
}

---

If you have .net Framework 4.5 installed, something like this should work, too:

[Reflection.Assembly]::LoadWithPartialName('System.IO.Compression')

$zipfile = 'C:\path\to\your.zip'
$files   = 'some.file', 'other.file', ...

$stream = New-Object IO.FileStream($zipfile, [IO.FileMode]::Open)
$mode   = [IO.Compression.ZipArchiveMode]::Update
$zip    = New-Object IO.Compression.ZipArchive($stream, $mode)

($zip.Entries | ? { $files -contains $_.Name }) | % { $_.Delete() }

$zip.Dispose()
$stream.Close()
$stream.Dispose()

The parentheses around filtering items from the Entries collection are required, because otherwise the subsequent Delete() would modify the collection. This would prevent reading (and thus deleting) other items from the collection. The resulting error message looks like this:

An error occurred while enumerating through a collection: Collection was modified;
enumeration operation may not execute..
At line:1 char:1
+ $zip.Entries | ? { $filesToRemove -contains $_.Name } | % { $_.Delete() }
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Collecti...ipArchiveEntry]:Enumerator) [], RuntimeException
    + FullyQualifiedErrorId : BadEnumeration