Powershell incrementing counter on variables [duplicate]

Question

Is it possible to increment count on variable objects in Powershell?

Example:

$var1 = "This"
$var2 = "Is"
$var3 = "A Test"

1..3 | ForEach-Object {$var$_ = DoSometing}

Reason I am asking this, is because I am creating a GUI with system.Windows.Forms.CheckBox. I have several checkbox objects in variables that end with a number I want to manipulate.

$Checkbox1
$Checkbox2
$Checkbox3
$Checkbox4

I am wondering if there is a clean and good way to manipulate these objects with an Foreach-Object. Instead of manipulating each object seperatly.

What you're trying to do is ill-advised. Don't do it. Use an array instead: $var = 1..3 | ForEach-Object { DoSomething }. — Ansgar Wiechers
– Ansgar Wiechers, Commented Apr 24, 2019 at 12:12
Don't think New-variable will help much here. I think for your usecase, you could better loop over the Controls inside your Form object. eg: $Form.Controls. Simply loop over all controls and then check it by name, type or group. Hope it helps! — Michael B.
– Michael B., Commented Apr 24, 2019 at 12:24

AdminOfThings · Accepted Answer · 2019-04-24 12:46:57Z

0

If you really need to create variables, then this can be done with the New-Variable command.

Foreach ($z in (1..3)) {
    New-Variable -Name "Var$z" -Value $z
}

$var1,$var2,$var3
1
2
3

If you need to retrieve or update values for already existing variables, then similarly you can use Get-Variable and Set-Variable.

Foreach ($z in (1..3)) {
    Set-Variable -Name "Var$z" -Value "Updated $z"
    Get-Variable "Var$z" -ValueOnly
}

Updated 1
Updated 2
Updated 3

edited Apr 24, 2019 at 12:46

answered Apr 24, 2019 at 12:15

AdminOfThings

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1 Comment

doenoe Over a year ago

The variables are already created and contain data. I want to manipulate the data of variable 1 to 9 in a loop if this is possible. Alternatively I can manipulate the data the normal way, but this would create a lot of extra code and work when the script changes.

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