PowerShell: Update SharePoint multiple value lookup column?!

Question

Hi.
I have some PowerShell scripts that access, update and insert data into various SharePoint 2010 lists. This all works nicely but there is one thing I'm having trouble with. I want to populate a lookup column in a list with multiple values. The column allows
multiple values and has many such records inserted manually - but I cannot do this using PowerShell. I can update the lookup column using a single "ID" lookup value - but not with multiple values.
I cannot find any documentation on how to do this using PowerShell. I have seen some examples (C#?) but there's little help in them.
Any suggestions?
Thank you,
Markus
Markus Sveinn Markusson

Answer 1

Well, being impatient in nature, I did a lot of browsing and searching - and finally found a solution that works for me - in this thread:
http://social.technet.microsoft.com/Forums/en/winserverpowershell/thread/3788a0ff-7011-4aea-bcc6-96a276a50e60. Adapted
to my code it looks like this:
$spAssignment = Start-SPAssignment
$spList = (Get-SPWeb -identity
http://site.domain.com -AssignmentCollection $spAssignment).Lists["Tickets"]
$spNew = $spList.Items.Add()
$spNew["Title"] = $Title
$spNew["Assigned To"] = $AssignID
$spNew["Description"] = $Descr
$spNew["Priority"] = $Priority 
#----- Begining of "solution"
$lookupentry1 = New-Object Microsoft.Sharepoint.SPFieldLookupValue(1,"Service 1")
$lookupentry2 = New-Object Microsoft.Sharepoint.SPFieldLookupValue(2,"Service 2")
$lookupentry3 = New-Object Microsoft.Sharepoint.SPFieldLookupValue(3,"Service 3")
$multientry = New-Object Microsoft.Sharepoint.SPFieldMultiChoiceValue($null)
$multientry.Add($lookupentry1)
$multientry.Add($lookupentry2)
$multientry.Add($lookupentry3)
$spNew["Service"] = $multientry
#----- End of "solution"
$spNew.Update()
Regards,
Markus
Markus Sveinn Markusson