case insensitive Powersell script

Question

The resource group from the initial deployment will be found, but a failure will occur while App Gateway backend names are created.

How can I make this part below case insensitive?

$BackendName = ($Client+"-"+$Env+"-"+$Role+"-BackEndPool")

Answer 1

There should no case sensitivity issue when doing variable assignments. You should be able to reference $Client as $client or $CLIENT.

One problem that you might have is that $env is normally used to reference environment variables.
IE, $env:COMPUTERNAME.

https://www.computerperformance.co.uk/powershell/environmental-variables/

If you are trying to define your own $env variable, then you might run into problems. I would recommend using a different variable name.

Beyond that we would need more details about what error or what output you get and you expect to get.

Answer 2

Where would you require case sensitivity (or case compliance)? Should the contents of $BackendName be all upper-case or all lower-case? That's easy:

$BackendName = ($Client+"-"+$Env+"-"+$Role+"-BackEndPool").ToLower()  
  
OR  
  
$BackendName = ($Client+"-"+$Env+"-"+$Role+"-BackEndPool").ToUpper()  

Or should any of the items you're concatenating be all lowercase or uppercase? Or should the only the first letter of each word be in uppercase? Something like this might help:

$Client = "IAmInCaMeLcAsE"  
$Env = "envwasalllower-case"  
$Role = "ROLEwasUpper-Case"  
  
$text = "$Client $Env $Role"  
( Get-Culture ).TextInfo.ToTitleCase( $text.ToLower() )  

Answer 3

You can't make the content case-insensitive -- that's up to the comparison operation. You'd need something to check the client and return what you want. Maybe something like this?

$ListOfClients = @('MarkNew','MarkOld')                         # this is a list of clients with the 'correct' casing  
$WantedCasing = @{'marknew'='MarkNew'; 'markold'='MarkOld'}     # hash keys are case insensitive  
  
function CheckCasing {  
    param (  
        [string]$Client  
    )  
    If ($ListOfClients -ccontains $Client){     # case sensitive!  
        $Client  
    }  
    else{  
        if ($WantedCasing.ContainsKey($Client)){  
            $WantedCasing.$Client               # return wanted casing  
        }  
    }  
}  
  
# check for proper casing  
$clients = "MarkNew","mArKnEw","MarkOld","markOLD"  
ForEach ($x in $clients){  
    CheckCasing $x  
}