powershell start-process doesn't accept two commands in ArgumentList because they have a same parameter

Question

I want to launch a admin powershell with two commands :

$command1 = "Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{example}' -Name DHCPClassId -Value National"
$command2 = "Restart-NetAdapter -Name Ethernet"
Start-Process powershell -Verb 'RunAs' -ArgumentList "-NoExit","-Command &{$command1,$command2}"

And i have an error : he don't want to execute these two because they have a same parameter (-Name), so, what can i do ?

score 1 · Accepted Answer · answered Mar 27 '21 at 17:50

PowerShell's statement separator is ;, not , (the latter constructs arrays).

Also:

Even though passing arguments individually, as elements of an array to Start-Process is conceptually clean, it should be avoided due to a long-standing bug: pass a single string encoding all arguments to -ArgumentList - see this answer for more information.
When using PowerShell's CLI, -Command & { ... } is never necessary - just use -Command ...; that is, there is no reason to construct a script block ({ ... }) that you must then invoke with & - all commands given are directly executed by default.

To put it all together:

$command1 = "Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{example}' -Name DHCPClassId -Value National"
$command2 = "Restart-NetAdapter -Name Ethernet"
Start-Process powershell -Verb RunAs "-NoExit -Command $command1; $command2"

powershell start-process doesn't accept two commands in ArgumentList because they have a same parameter

1 Answers1