Powershell ForEach-Object : Cannot bind parameter

Question

I am trying to get the owner of a process using this code:

(Get-WmiObject -class win32_process | where{$_.ProcessName -eq 'explorer.exe'}).getowner() | Foreach-Object user | out-string 

This works great under Windows 8 but in Windows 7 I get this message:

ForEach-Object : Cannot bind parameter 'Process'. Cannot convert the "user" value of type "System.String" to type "System.Management.Automation.ScriptBlock". At C:\Program Files (x86)\Advanced Monitoring Agent GP\scripts\9660.ps1:1 char: 108 + (Get-WmiObject -class win32_process | where{$_.ProcessName -eq 'explorer.exe' }).getowner() | Foreach-Object <<<< user | out-string + CategoryInfo : InvalidArgument: (:) [ForEach-Object], Parameter BindingException + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.ForEachObjectCommand

Answer 1

Please modify the user iterator and try on both 7 and 8:

(Get-WmiObject -class win32_process | where{$_.ProcessName -eq 'explorer.exe'}).getowner() | Foreach-Object {$_.user } | out-string 

Answer 2

You can do this with line breaks:

gwmi win32_process | where ProcessName -Match "explorer" | foreach {$_.GetOwner().User | Out-String} 

Or without

gwmi win32_process | where ProcessName -Match "explorer" | foreach {$_.GetOwner().User} 

Remember to wrap your foreach 'script' inside {}'s.

For the sake of completeness I'll say this was done with Powershell 3.0, hence no {} for the where-object cmdlet, and no $_ for the ProcessName property.