Mandatory parameter for inner function

Question

I'm stuck trying to figure out the best method for calling a function from a function and making parameters mandatory for both functions. I've got the below so far, and things work because I know what cmdline params to specify.

I did find this post but I'm not sure how to use that with a function that calls a function.

Edit: added shorter code. In the code, How would you make the ParamSet parameter [string]$killserver mandatory for both the parent function main and the child function KillSwitch so that if the function is run main -nukejobs Powershell prompts for the variable $killserver

Edit 2: worked out the prompting for the mandatory param serverlist and datelist but it appears now the child function doesn't write to host "receive input from $serverlist and $datelist"

Edit 3: corrected the Switch ($PSCmdlet.ParameterSetName){ value for RunMulti and now things look good.

Function Main{
  [CmdletBinding(SupportsShouldProcess=$true,DefaultParameterSetName="ViewOnly")]
  Param(
    [Parameter(Mandatory=$false,ParameterSetName="KillSwitch")]
    [Switch]$NukeJobs,
    [Parameter(Mandatory=$true,ParameterSetName="KillSwitch",
      HelpMessage="Enter ServerName to remove the scheduled reboot for, Check using main -viewonly")]
    [String]$killserver,
    [Parameter(Mandatory=$false,ParameterSetName="RunMulti")]
    [switch]$RunMultiple,
    [Parameter(Mandatory=$true,ParameterSetName="RunMulti")]
    [String]$serverlist,
    [Parameter(Mandatory=$true,ParameterSetName="RunMulti")]
    [String]$datelist
  )

  Switch ($PSCmdlet.ParameterSetName) {
    "KillSwitch" {
      KillSwitch -server $killserver
    } # end killswitch
    "RunMulti" {
      RunMulti -serverlist $serverlist -datelist $datelist
    } # end run multi
  } # end switch block
} # end main function

Function KillSwitch{
  Param(
    [Parameter(Mandatory=$true)]
    [String]$server
  )

  "Removing previous scheduled reboot for $server"
} # end killswitch function

Function RunMulti {
  Param(
    [Parameter(Mandatory=$true,
      HelpMessage="Text file with server names to reboot, one per line!")]
    [string]$serverlist,
    [Parameter(Mandatory=$true,
      HelpMessage="Text file with date/times, one per line!")]
    [String]$datelist
  )

  "receive input from $serverlist and $datelist"
}

I'm afraid I don't understand how [Parameter(Mandatory=$true)] is not what you want. That is how you make parameters mandatory. Perhaps you have a shorter code sample that outlines your problem? — Matt
Based on your code when i run main -NukeJobs i get asked for the killserver parameter, are you not getting the same result? — Bluecakes
The way you have it now with main -nukejobs PowerShell would prompt you for $killserver... so then if killswitch is called appropriately inside main there would never be a problem — Matt
Apologies, the problem is with RunMultiple because as the code sits, Powershell doesn't prompt for the parameters which are going to end up being file paths. — user4317867

user4317867 user4317867 · Accepted Answer · 2015-08-20T21:44:47

I found the mandatory parameters needed separate:

[Parameter(Mandatory=$true,ParameterSetName="RunOnce")] blocks.

For example, this won't work, even if Mandatory=$true

My guess is because it only applies to [switch]

[Parameter(Mandatory=$false,ParameterSetName="RunOnce",
HelpMessage="Enter ServerName to schedule reboot for.")]
[switch]$RunOnce,
[string]$server,
[string]$date,

But this will work, causing Powershell to prompt for $server and $date when the RunOnce switch is given.

[Parameter(Mandatory=$false,ParameterSetName="RunOnce",
 HelpMessage="Enter ServerName to schedule reboot for.")]
 [switch]$RunOnce,
[Parameter(Mandatory=$true,ParameterSetName="RunOnce")]
 [string]$server,
[Parameter(Mandatory=$true,ParameterSetName="RunOnce")]
 [string]$date,

Mandatory parameter for inner function

1 Answers