Cfrgtkky

newbie here. I am trying to write a PowerShell script to:

1. loop through all files in directory


2. List item


3. 
   

   Get all .pdf files ONLY

   
   
   

   Rename them-the file names are long - over 30 chars
   -They contain 2 numbers which I need to extract
   -Example:

   
   
   

   Cumulative Update 11 for Microsoft Dynamics NAV 2018 (Build 25480).pdf ->
   RESULT : = 18CU11.pdf

   
   

I tried examples from bunch of sites and I can't seem to even loop successfully.
Either get an error - that path doesn't exist or that can't rename files as somehow loop gets a filepath and that I can't rename

Get-ChildItem "C:Users******DesktopPowerShell Practice" -Filter *.pdf |  #create list of files



ForEach-Object{

    $oldname = $_.FullName;

    $newname = $_.FullName.Remove(0,17); 

    #$newname = $_.FullName.Insert(0,"CU")



    Rename-Item $oldname $newname;



    $oldname;

    $newname;  #for testing

}

That's just latest attempt, but any other ways of doing it will be fine - as long as it does the job.

Try this logic:

[string]$rootPathForFiles = Join-Path -Path $env:USERPROFILE -ChildPath 'DesktopPowerShell Practice'

[string]$listOfFilesToRename = Get-ChildItem -Path $rootPathForFiles -Filter '*.PDF' | Select-Object -ExpandProperty FullName

$listOfFilesToRename | ForEach-Object {

    #get the filename wihtout the directory

    [string]$newName = Split-Path -Path $_ -Leaf 

    #use regex replace to apply the new format

    $newName = $newName -replace '^Cumulative Update (d+) .*NAV 20(d+).*$', '$2CU$1.pdf' # Assumes a certain format; if the update doesn't match this expectation the original filename is maintained

    #Perform the rename

    Write-Verbose "Renaming '$_' to '$newName'" -Verbose #added the verbose switch here so you'll see the output without worrying about the verbose preference

    Rename-Item -Path $_ -NewName $newName 

}

Check the Help for Rename-Item. The Parameter -NewName requires the name of the file only, not the full path.

Try out this:

Get-ChildItem "C:Users******DesktopPowerShell Practice-Filter" -Filter *.pdf |  #create list of files



ForEach-Object{

    $oldname = $_.FullName

    $newname = $_.Name.Remove(0,17)



    Rename-Item -Path $oldname -NewName $newname



    $oldname

    $newname  #for testing

}

Please try this

Get-ChildItem -Path "C:Users******DesktopPowerShell Practice-Filter" -Filter *.pdf | Rename-Item -NewName $newname