how to set Set-VMFirmware on a single line in powershell

Question

i am trying to make a small c# application to create my Hyper V VM's but i has got a problem with powershell in c# so i just running every powershell cmdlet using cmd.exe

but now i cant get how to set dvddrive as firstbootdevice in generation 2 virtual machine in just one line for powershell script i use

$VMNAME= "SQL3"
$VMDVD = Get-VMDvdDrive -VMName $VMNAME
Set-VMFirmware -VMName $VMNAME -FirstBootDevice $VMDVD

but how can i do it in a single line

Answer 1

通常，任何变量引用都可以由子表达式（ $() ）代替：

Set-VMFirmware -VMName "SQL3" -FirstBootDevice $(Get-VMDvdDrive -VMName "SQL3")

Answer 2

If you have multiple DVD drives and know the ISO file

$DvdBootDrive = Get-VMDvdDrive -VMName $VmName | where {$_.Path -Like "*AutoInstall.iso*" }
Set-VMFirmware -VMName $VmName -FirstBootDevice $DvdBootDrive