Powershell Script assistance required - powershell

Question

I'm piping a file's contents to Select-Object and creating two properties for each name, ComputerName and FileExists, where the latter value is the result of Test-Path
Get-Content c:\Users\Admin\Documents\Scripts\Serverlist.txt | `
Select-Object #{Name='ComputerName';Expression={$_}},#{Name='FolderExist';Expression={ Test-Path "\\$_\c$\Data\Repository"}},
#{Name='Size';Expression={$_.Sum}}
I want to return the size of this folder if it exists on each server. How would you do it ?
Tried adding
#{Name='Size';Expression={$_.Sum}}
to my select-object but that does not return any value

Answer 1

I think this is what you are looking for
Get-Content c:\Users\Admin\Documents\Scripts\Serverlist.txt | Select-Object #{Name='ComputerName';Expression={$_}},#{Name='FolderExist';Expression={ Test-Path "\\$_\c$\Data\Repository"}}, #{Name='Size';Expression={ "{0:n2}" -f ((gci -path "\\$_\c$\Data\Repository" -recurse | measure-object -property length -sum).sum /1mb) + " mb" }}

Answer 2

Since at least one calculated property depends on the other, you would have to do at least 2 Select-Object statements, but I would probably use ForEach-Object and New-Object instead:
Get-Content c:\Users\Admin\Documents\Scripts\Serverlist.txt | ForEach-Object {
New-Object psobject -Property #{
'ComputerName' = $_
'FileExists' = ($FileExists = Test-Path ($FilePath = "\\$_\c$\Data\repository"))
'Size' = if($FileExists){ (Get-Item $FilePath).Length } else { $null }
}
}
(Get-Item $FilePath).Length won't get you far if C:\Data\repository is a directory, but you can substitute your own statement inside the if block
For the sake of my future coworkers I would probably avoid doing a one-liner like your example, and write multiple statements like so:
Get-Content c:\Users\Admin\Documents\Scripts\Serverlist.txt | ForEach-Object {
$ComputerName = $_
$FilePath = "\\$ComputerName\c$\Data\repository"
$FileExists = Test-Path $FilePath
if($FileExists){
$Size = Get-Item $FilePath | Select-Object -ExpandProperty Length
} else {
$Size = $null
}
New-Object psobject -Property #{
'ComputerName' = $ComputerName
'FileExists' = $FileExists
'Size' = $Size
}
}