How to iterate through an array of objects in Powershell

user_5847182 0
Viewed 1459

I'm doing some basic validation on form fields. What's the correct way to iterate through an array of objects to validate them? When I try the below I get

The property 'BackColor' cannot be found on this object. Verify that the property exists and can be set.

I guess what I'm missing is a way of telling Powershell these are references to other variables, rather than variables themselves.

$MandatoryFields = @(
    'txtUsername',
    'txtFirst',
    'txtLast',
    'txtEmail',
    'ComboLicense'
)

ForEach ($Field in $MandatoryFields) {
    If ([string]::IsNullOrWhitespace($Field.text)) {
        $Validation = "failed"
        $Field.BackColor = "red"
    }
}

EDIT: Okay, what I needed was the actual variables in the array, like so:

$MandatoryFields = @(
    $txtUsername,
    $txtFirst,
    $txtLast,
    $txtEmail,
    $ComboLicense
)
powershell
2 Answers

Try adding your objects to an array like below

$objects = [System.Collections.ArrayList]@()

$myObject = [PSCustomObject]@{
    Name     = 'Kevin'
    Language = 'PowerShell'
    State    = 'Texas'
}


$objects.add($myObject)

$myObject1= [PSCustomObject]@{
    Name     = 'Kevin'
    Language = 'PowerShell'
    State    = 'Texas'
}


  $objects.add($myObject1)

foreach($obj in $objects){

$obj.firstname

}
user_29753960

I'm assuming your using System.Windows.Forms to create your form. If that's the case when adding controls you should assign a name to the control. Then you can loop through your controls and check if the control name matches your list of mandatory controls and then execute your check.

$MandatoryFields = @(
    'txtUsername',
    'txtFirst',
    'txtLast',
    'txtEmail',
    'ComboLicense'
)

$Controls = MyForm.controls

ForEach ($c in $Controls) {
    ForEach ($Field in $MandatoryFields) {
        if ($c.Name -eq $Field) {
            If ([string]::IsNullOrWhitespace($c.text)) {
                $Validation = "failed"
                $c.BackColor = "red"
            }
        }
    }
}
user_47159050
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