powershellvariablesquotesvariable-expansion

PowerShell using a variable in quotes within a command

I have this which works (triple double quotes are not a mistake; it works exactly like this)—concentrate on the Start-Process part:

Start-Process powershell -Credential $cred -WorkingDirectory "$lettre_disque" -ArgumentList '-noprofile -command &{Start-Process """D:\WD Drive Unlock.exe""" -verb runas}'

Now I'm simply trying to replace the string D:\WD Drive Unlock.exe with a variable named $chemin_fichier which contains the exact same text (D:\WD Drive Unlock.exe).

I'm trying:

"""$chemin_fichier"""

""$chemin_fichier""

"$chemin_fichier"

""""$chemin_fichier""""

Nothing works...

How do I get that variable to show up? This command is pretty confusing. What is the right combination? Do I have to escape something or?

Solution

  • I'd break your command into pieces using splatting:

    $chemin_fichier = 'D:\WD Drive Unlock.exe'

$ArgList = @{
    FilePath = 'powershell'
    Credential = $cred
    WorkingDirectory = $lettre_disque
    ArgumentList = @(
        '-NoProfile'
        '-Command'
        "`"Start-Process -FilePath '$chemin_fichier' -Verb runas`""
    )
}
Start-Process @ArgList

    Wrapping your command in a script block was unnecessary.