Output Value from select-object calculated value - object

Question

I've used a hash table to calculate some values for my VMWare inventory script, but now when I output the data, it records it as a key/value pair. I'd like to dump just the value. When I simply take what I'm handed that works fine, but when I get picky PS starts to stonewall me. :-)
Here is the relevant part of the script.
foreach ($machine in $vmList) {
$vmname = $machine.Name
$properties = #{
'Name'=Get-VM $vmname | Select -ExpandProperty Name
'RAM'=Get-VM $vmname | Select -ExpandProperty MemoryGB
'CpuCount'=Get-VM $vmname | Select -ExpandProperty NumCpu
'UsedDiskGB'=Get-VM $vmname | Select-Object #{n="UsedDiskGB"; e={[math]::Round( $_.UsedSpaceGB, 3 )}}
'TotalDiskGB'=Get-VM $vmname | Select-Object #{n="TotalDiskGB"; e={[math]::Round((Get-HardDisk -vm $_ | Measure-Object -Sum CapacityGB).Sum)}}
'Networks'=Get-VM $vmname | Select-Object #{n="Networks"; e={(Get-NetworkAdapter -VM $_ |Sort-Object NetworkName |Select -Unique -Expand NetworkName) -join '; '}}
'OS'=(Get-VM -Name $vmname | Get-View).summary.config.guestFullName
}
$object=New-Object -TypeName PSObject -Prop $properties
Export-Csv -Path $WorkDir\vms.csv -Append -Encoding UTF8 -InputObject $Object
Write-Output $Object
}
How do I get UsedDiskGB, Networks and TotalDiskGB to display just the value instead of something like '#{TotalDiskGB=80}'? Ram, OS, CpuCount and Name work exactly as desired already.
Also, suggestions on doing this in a faster way are welcome. I'm sure all these calls can be done better. I had it done in a single line, but then they asked for OS to be added and that changed everything.

Answer 1

Easy, but bad way:
In the expression pipe to |Select -ExpandProperty <property name> to get just the value. Such as:
'TotalDiskGB'=Get-VM $vmname | Select-Object #{n="TotalDiskGB"; e={[math]::Round((Get-HardDisk -vm $_ | Measure-Object -Sum CapacityGB).Sum)}}|select -expand totaldiskgb
The better way:
Structure your properties better to start with. Try this:
'TotalDiskGB'= [math]::Round((Get-HardDisk -vm (Get-VM $vmname) | Measure-Object -Sum CapacityGB).Sum)
The reason you're having issues is because you are creating a PSCustomObject with your Select, and Totaldiskgb is a property of that object. You don't want to make an object, you just want the value of that property.
Edit: Thank you to #briantist for pointing out that Get-VM $vmname should be called once, and stored as an object to be used later, rather than called for each time it is needed for a member of $Properties. For example:
foreach ($machine in $vmList) {
$vmname = $machine.Name
$vmobject = Get-VM $vmname
$properties = #{
'Name'=$vmobject | Select -ExpandProperty Name
'RAM'=$vmobject | Select -ExpandProperty MemoryGB
'CpuCount'=$vmobject | Select -ExpandProperty NumCpu
'UsedDiskGB'=[math]::Round( $vmobject.UsedSpaceGB, 3 )
'TotalDiskGB'=[math]::Round((Get-HardDisk -vm $vmobject | Measure-Object -Sum CapacityGB).Sum)
'Networks'=(Get-NetworkAdapter -VM $vmobject |Sort-Object NetworkName |Select -Unique -Expand NetworkName) -join '; '
'OS'=($vmobject | Get-View).summary.config.guestFullName
}
$object=New-Object -TypeName PSObject -Prop $properties
Export-Csv -Path $WorkDir\vms.csv -Append -Encoding UTF8 -InputObject $Object
Write-Output $Object
}