Assign local variable within scriptblock - powershell

Question

I am trying to assign a local variable from within a scriptblock with no luck. The goal is log a status of each machine for the action taken with the data prior and the data after the change. I am not sure how to assign a local variable from within a script block. Any help is much appreciated.
$csvContents = #() # Create the empty array that will eventually be the CSV file
$Computers = Get-ADComputer -Filter '(OperatingSystem -like "Windows Server*") -and (Name -like "AD*")' | Sort-Object Name
foreach ($Computer in $Computers) {
$row = New-Object PSObject # Create an object to append to the array
$row | Add-Member -MemberType NoteProperty -Name "ComputerName" -Value NotSet
$row | Add-Member -MemberType NoteProperty -Name "PingStatus" -Value NotSet
$row | Add-Member -MemberType NoteProperty -Name "DNSChangeStatus" -Value NotSet
$row | Add-Member -MemberType NoteProperty -Name "BeforeChange" -Value NotSet
$row | Add-Member -MemberType NoteProperty -Name "AfterChange" -Value NotSet
#Write-Host "$($Computer.Name): " -ForegroundColor Yellow
$row.ComputerName = $Computer.Name
$rtn = Test-Connection -CN $Computer.dnshostname -Count 1 -BufferSize 16 -Quiet
if ($rtn -match 'True') {
Write-Host -ForegroundColor Green $Computer.DnsHostname
$row.PingStatus = 'Pingable'
Invoke-Command -ComputerName $Computer.Name -ScriptBlock {
$NewDnsServerSearchOrder = "10.93.108.225","10.93.108.134"
$Adapters = Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.DHCPEnabled -ne 'True' -and $_.DNSServerSearchOrder -eq "10.93.108.226"}
if ($Adapters -ne $null) {
# Show DNS servers before update
Write-Host "Before: " -ForegroundColor Green
$row.DNSChangeStatus = 'Change Needed'
$Adapters | ForEach-Object {
$_.DNSServerSearchOrder
$row.BeforeChange = $_.DNSServerSearchOrder
}
# Update DNS servers
$Adapters | ForEach-Object {$_.SetDNSServerSearchOrder($NewDnsServerSearchOrder)} | Out-Null
# Show DNS servers after update
$Adapters = Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.DHCPEnabled -ne 'True' -and $_.DNSServerSearchOrder -ne $null}
Write-Host "After: " -ForegroundColor Green
$Adapters | ForEach-Object {
$_.DNSServerSearchOrder
$row.AfterChange = $_.DNSServerSearchOrder
}
} else {
Write-Host "No DNS change needed " -ForegroundColor Yellow
$row.DNSChangeStatus = 'No DNS Change Needed'
}
}
} else {
Write-Host -ForegroundColor Red $Computer.DnsGostname
Write-Host -ForegroundColor Red "Host not pingable"
$row.PingStatus = 'Not Pingable'
}
$csvContents += $row # append the new data to the array
$row = $null
}
$csvContents | Export-Csv -Path C:\DNSChanges.csv

Answer 1

I can't tell exactly what you want to do so I'll guess it's "pass a variable to scriptblock being invoked on a remote machine". If this is the case, you can either add parameters to the scriptblock or use the $using: qualifier as in:
$using:row.DNSChangeStatus = 'Change Needed'
Note that you can't "return" anything that way so you'd have to actually return the modified object from Invoke-Command.
$row = Invoke-Command -ComputerName $Computer.Name -ScriptBlock {
and add
$row
as the last line of the scriptblock.