CODEWITHSUNDEEP
powershell
blitz
blitz

Reputation: 21

Access objects using variable name powershell

I am unable to access my object using .PropertyName.

I have tried using $val.Options.$propertyName but it yields no result.

$propertyName is a value input from a file

`$val.$propertyName` results in "Cannot index into null array"

$result = New-Object -TypeName 'System.Collections.ArrayList';
        foreach ($user in $users) {
            $val = Get-LocalUser $user | Select *
            $val = $val.$propertyName
            $result.Add($val)
        }

Upvotes: 1

Views: 366

Answers (2)

Theo
Theo

Reputation: 61263

You don't need an arraylist at all. Just let PowerShell do the collecting by capturing the output inside the loop

$result = foreach ($user in $users) {
    (Get-LocalUser $user).$propertyName
}
This is assuming your variable `$propertyName` contains a valid attribute name

While the above code does what you've asked for, I don't think the result would be very helpful, because it just lists whatever is in the property stored in $propertyName, and you cannot see which user has what values in there. A better approach would be to output objects with the properties you want returned.

Something like

# just an example..
$propertyName = 'Description'
$users        = 'WDAGUtilityAccount', 'Administrator'
$result = foreach ($user in $users) {
    output an object with the name of the user, and also the property you are after
    Get-LocalUser $user | Select-Object Name, $propertyName
}

$result

Since parameter -Name (the first positional parameter) can take an array of usernames, this can be shortened to:

$result = Get-LocalUser $users | Select-Object Name, $propertyName

Upvotes: 2

JPBlanc
JPBlanc

Reputation: 72680

In your context $val.$propertyName does't mean anything can you try :

$result = New-Object -TypeName 'System.Collections.ArrayList';
        foreach ($user in $users) {
            $val = Get-LocalUser $user
            $result.Add($val)
        }

$result will be an array of "Localuser".

Upvotes: 1

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