Check Multiple Computers if Path Exists and Export to CSV - powershell

Question

I want to make a script that will check whether or not a directory exists on each computer in "computers.csv".
This is what I've come up with:
$results = #()
$computers = Get-Content "C:\Users\me\Desktop\Notes\Computers.csv"
foreach ($computer in $computers) {
$path = Test-Path "\\$computer\c$\Program Files\Folder\"
if ($path -eq $true)
$Output = "True"
else
$Output = "False"
}
$details = #{
Computer_Name = $computer
Output = $Output
}
$results += New-Object PSObject -Property $details
$results |
Select-Object -Property Computer_Name,Output |
Export-Csv c:\results.csv -NoTypeInformation
Script is failing and I'm not entirely sure why. I need the script to export to a CSV due to how many computers are being queried.

Answer 1

You've got several syntax errors. You're missing brackets with if and else, and your foreach closing bracket is in the wrong place. Try this:
$results = #()
$computers = Get-Content "C:\Users\me\Desktop\Notes\Computers.csv"
foreach ($computer in $computers) {
$path = Test-Path "\\$computer\c$\Program Files\Folder\"
If ($path -eq $true) {
$Output = "True"
}
Else {
$Output = "False"
}
$details = #{
Computer_Name = $computer
Output = $Output
}
$results += New-Object PSObject -Property $details
}
$results | select-object -property Computer_Name, Output | Export-csv c:\results.csv -NoTypeInformation
That said, this pattern is one that should be avoided:
$results = #()
foreach ($item in $set) {
$results += $item
}
$results
The problem is that $results += $item copies the entire array into a new array and then adds the new item. It's a huge overhead as the size of the array increases.
Try something like this instead:
Get-Content "C:\Users\me\Desktop\Notes\Computers.csv" | ForEach-Object {
[PSCustomObject]#{
Computer_Name = $_
Output = Test-Path "\\$_\c$\Program Files\Folder\"
}
} | Export-Csv -Path C:\results.csv -NoTypeInformation