PowerShell parameters from file - function

Question

I am having some issue in calling a function using named parameters.
This is the declaration of the function in a separate file (Security.ps1):
function Add-SSRSItemSecurity
(
[Parameter(Position=0,Mandatory=$false)]
[Alias("SSRSrange")]
[string]$range,[Parameter(Position=1,Mandatory=$false)]
[Alias("path")]
[string]$itemPath,
[Parameter(Position=2,Mandatory=$false)]
[Alias("grp")]
[string]$groupUserName,
[Parameter(Position=3,Mandatory=$false)]
[Alias("SSRSrole")]
[string]$role,
[Parameter(Position=2)]
[bool]$inherit=$true
)
I then call this function in another Host.ps1 script as:
Set-Location 'C:\SSRSJobs'
. .\SSRSsecurity.ps1
This call works in the Host file:
Add-SSRSItemSecurity -range "server1" -itemPath "/Test" -groupUserName "CN\Group" -role "Browser"
I tried to pass in multiple parameters to the function as a loop, but calling new variables each time:
$securityArray = #()
$securityArray = Get-Content -Path "C\ReleaseSecurity.txt"
foreach($line in $securityArray)
{
Add-SSRSItemSecurity $line;
}
The file having:
-range "server1" -itemPath "/Test" -groupUserName "CN\Group" -role "Browser"
-range "server2" -itemPath "/Test" -groupUserName "CN\Group" -role "Browser"
-range "server3" -itemPath "/Test" -groupUserName "CN\Group" -role "Browser"
The error I get is:
Add-SSRSItemSecurity : Cannot bind positional parameters because no names were given.
At line:229 char:27
+ Add-SSRSItemSecurity <<<< $line;
+ CategoryInfo : InvalidArgument: (:) [Add-SSRSItemSecurity], ParameterBindingExcepti
on
+ FullyQualifiedErrorId : AmbiguousPositionalParameterNoName,Add-SSRSItemSecurity
Inspecting the string, the $line variable does hold correct naming for parameters. I've tried all sorts of error trapping, but I'm unable to get a decent error message other than the above. I've also tried forms of quoting, but I cannot get the function to see the name binding.
Can multiple variables be called in a function that are bound to just a PowerShell variable name?

Answer 1

You can use splatting for that. Save the parameters as a CSV like this:
"range","itemPath","groupUserName","role"
"server1","/Test","CN\Group","Browser"
"server2","/Test","CN\Group","Browser"
"server3","/Test","CN\Group","Browser"
and load it like this:
Import-Csv 'C:\ReleaseSecurity.txt' | % {
Add-SSRSItemSecurity #_
}