Move Item path null - powershell

Question

I have to move files from a folder corresponding to a CSV column like that :
id
name
1a
file1
2b
file2
3c
file3
4d
file4
So if in my folder I have a file named file1 I need to create a folder named 1a and put file1 inside.
I have the following script
$CsvId = Import-Csv './test.csv'
$sourcePath= "C:\Users\olong\Desktop\object"
$dirPath = "C:\Users\olong\Desktop\dir"
$files = Get-ChildItem -Path $sourcePath | ForEach-Object -Process {[System.IO.Path]::GetFileNameWithoutExtension($_)}
$pattern = '(?<=_).*(?=_)'
ForEach ($item In $CsvId) {
$objectID = $item.'id'
$docID = $item.'name'
$location = $dirPath+ "\" + $objectID
Foreach ($file in $files) {
if($file -contains $docID) {
if (-not (Test-Path -Path $location)) {
mkdir -Path $location
}
Move-Item ($file.FullName) -Destination $location -Verbose -Force
}
}
}
But it gives me that error :
Move-Item : Cannot bind argument to parameter 'Path' because it is null.
At C:\Users\olong\Desktop\scriptMove.ps1:19 char:15
+ Move-Item ($file.FullName) -Destination $location -Verbose -Force
+ ~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Move-Item], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.MoveItemCommand
With PowerShell's debugger $file is not null and with or without parenthesis on $file.FullName does nothing

Answer 1

I think what you want to do is to get the file(s) as mentioned in the csv under header 'name' having any extension into a subfolder as mentioned in field 'id' and create that subfolder first if it does not already exist.
If my assumtion is correct, you can try below:
$sourcePath = "C:\Users\olong\Desktop\object"
$destinationPath = "C:\Users\olong\Desktop\dir"
Import-Csv -Path './test.csv' | ForEach-Object {
$targetDirectory = Join-Path -Path $destinationPath -ChildPath $_.id
# create the output subfolder if it does not already exist
$null = New-Item -Path $targetDirectory -ItemType Directory -Force
# next use the file basename from the $_.name column as filter and move the file(s)
Get-ChildItem -Path $sourcePath -Filter "$($_.name).*" -File | Move-Item -Destination $targetDirectory
}