How to check if a not mandatory parameter was used on a customized PowerShell function? To answer this question, I’ve made an example where you’ll see how you can handle it.
Let’s imagine that we have the following parameters on a function…
function Set-ServiceRunningStatus{ [CmdletBinding()] Param( [Parameter(ValueFromPipeline=$true)] [string[]]$ComputerName, [Parameter(Mandatory=$true, HelpMessage = "Enter a service name (or filter for multiple) to set Running Status")] [string]$Name, [switch]$Force ) BEGIN { } #BEGIN PROCESS { } #PROCESS END { } #END } And we want to check if during the function execution the non-mandatory ComputerName parameter is being used… You can use the automatic variable $PSBoundParameters to perform your check.
if ($PSBoundParameters.ContainsKey('ComputerName')) { Write-Verbose "[PROCESS] Getting Services for $($ComputerName)" } else { Write-Verbose "[PROCESS] Getting Services" }#if param ComputerName Let me know if it helped.
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