Powershell create New-Variable from foreach loop to be used outside of the loop-CodePudding

So I am pulling in an array and then cleaning it to just the unique values I need and then running that though a foreach loop to create

$ZoneArray = Import-Csv -Path "Test.csv" | select Zone
$Zones = @()
foreach ($Zone in $ZoneArray){
        $Zones  = $Zone.Zone
}
$Zones = $Zones | select -Unique

foreach ($ZonesTest in $Zones){
            Set-Variable -Name "Zone$_" -Value $ZonesTest -Force
    
            New-UDTab -Text $ZonesTest -Content {
                    New-Variable -Name 'CurrentZone'
                    New-UDmuButton -Id 'Zone1Test' -Text (   " On") -Variant contained -FullWidth -OnClick {
                            Show-UDToast -Message "Starting" -Duration 1000 -Position center
                            $ZoneFullArray = $FullArray | Where-Object Zone -eq $ZonesTest
                            foreach ($ZoneFullArrayTest in $ZoneFullArray){
                                    Set-UDButtonStateChange -Id 'Zone1Test' -Text $ZoneFullArrayTest.ReceiverIPAddress
                                    Start-Sleep -Milliseconds 1000
                            }
                    }
            }
    }

Using Set-Variable -Name "Zone$_" -Value $ZonesTest -Force I am able to call the correct value while it is running. I have tried using

$Q=1
Set-Variable -Name "Zone$Q" -Value $ZonesTest -Force`
$Q

But then I don't know how to dynamically call back the correct $Zone$Q for the later button press.

Is there anyway to program a dynamic variable that remembers the state it was made and then I can recall it later without knowing it's name? I know that sounds really confusing.

Ideas?

Edit:

I am banging my head against the wall. I know that the $ZoneFullArray = ... and foreach ($ZoneFullArrayTest in $ZoneFullArray){... is what is breaking it but can't think of another way to write it. The problem I am trying to solve with the second foreach to create a button dynamically based off the CSV table and then pull the value of the IP addresses that match the main row value making $Zones. The issue is that the code within the button is not run until it is pressed so it is hard to write them dynamically.

CodePudding user response：

As iRon points out, variable indirection (referring to variables indirectly, via dynamically created variable names) is best avoided - see this post.

It sounds like what you're really looking for are script-block closures that lock in then-current variable values in each iteration of a loop, along the following lines:

# Sample input zones.
$zones = 'foo', 'bar', 'baz'

# Create a script block with a closure for each zone.
$scriptBlocks = 
 foreach ($zone in $zones) {
   # .GetNewClosure() locks in the iteration-specific value of $zone
   { "This zone: $zone" }.GetNewClosure()
 } 

# Execute the script blocks to demonstrate that the values where
# captured as intended.
$scriptBlocks | ForEach-Object { & $_ }

Output:

This zone: foo
This zone: bar
This zone: baz

CodePudding user response：

So I ended up using the code blocks @mklement0 suggested but added the param option I found to pass data into the code block.

$CodeBlock = { param($par1, $par2)
foreach ($Row in $par1){
        $SwitchIPCurrent = $Row.SwitchIP
        $SwitchUsernameCurrent = $Row.SwitchUsername
        $SwitchPasswordCurrent = $Row.SwitchPassword
        $SwitchPortCurrent = $Row.SwitchPort
}
}

To run the code just pass the param into the code block

&$CodeBlock -par1 $ImportedArray -par2 $Variable