How to pass a custom enum to a function in powershell - powershell

Question

When defining a function, how can you reference a custom enum?
Here's what I'm trying:
Add-Type -TypeDefinition #"
namespace JB
{
public enum InternetZones
{
Computer
,LocalIntranet
,TrustedSites
,Internet
,RestrictedSites
}
}
"# -Language CSharpVersion3
function Get-InternetZoneLogonMode
{
[CmdletBinding()]
param
(
[Parameter(Mandatory=$true)]
[JB.InterfaceZones]$zone
)
[string]$regpath = ("HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\{0}" -f [int]$zone)
$regpath
#...
#Get-PropertyValue
}
Get-InternetZoneLogonMode -zone [JB.InternetZones]::TrustedSites
But this gives the error:
Get-ZoneLogonMode : Unable to find type [JB.InterfaceZones]. Make sure that the assembly that contains this type is loaded.
At line:29 char:1
+ Get-ZoneLogonMode -zone [JB.InternetZones]::TrustedSites
+ ~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (JB.InterfaceZones:TypeName) [], RuntimeException
+ FullyQualifiedErrorId : TypeNotFound
NB: I'm aware I could use ValidateSet for similar functionality; however that has the disadvantage of only having a name value; as opposed to allowing me to program using friendly names which are then mapped to ints in the background (I could write code for that; but enum seems more appropriate if possible).
I'm using Powershell v4, but ideally I'd like a PowerShell v2 compatible solution as most users are on that version by default.
Update
I've corrected the typo (thanks PetSerAl; well spotted).
[JB.InterfaceZones]$zone now changed to [JB.InternetZones]$zone.
Now I'm seeing error:
Get-InternetZoneLogonMode : Cannot process argument transformation on parameter 'zone'. Cannot convert value "[JB.InternetZones]::TrustedSites" to type
"JB.InternetZones". Error: "Unable to match the identifier name [JB.InternetZones]::TrustedSites to a valid enumerator name. Specify one of the following
enumerator names and try again: Computer, LocalIntranet, TrustedSites, Internet, RestrictedSites"
At line:80 char:33
+ Get-InternetZoneLogonMode -zone [JB.InternetZones]::TrustedSites
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Get-InternetZoneLogonMode], ParameterBindingArgumentTransformationException
+ FullyQualifiedErrorId : ParameterArgumentTransformationError,Get-InternetZoneLogonMode

Answer 1

The ISE gave this one away to me but your attempted syntax was not completely incorrect. I was able to do this and get it to work.
Get-InternetZoneLogonMode -Zone ([JB.InternetZones]::TrustedSites)
Again, If you look at the highlighting you will see how I came to that conclusion.

Answer 2

Per comments by PetSerAl & CB:
Corrected typo in function definition
from [JB.InterfaceZones]$zone
to [JB.InternetZones]$zone
Changed function call
from Get-InternetZoneLogonMode -zone [JB.InternetZones]::TrustedSites
to Get-InternetZoneLogonMode -zone TrustedSites