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powershellazurepowershell-4.0

PowerShell PromptForChoice

I have the following problem.

I want to offer the user of my powershell script the choice of what Azure Subscription to use. I've been following this example (included because it also shows the part I can't figure out).

Example

$title = "Delete Files"
$message = "Do you want to delete the remaining files in the folder?"

$yes = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes", `
    "Deletes all the files in the folder."

$no = New-Object System.Management.Automation.Host.ChoiceDescription "&No", `
    "Retains all the files in the folder."

$options = [System.Management.Automation.Host.ChoiceDescription[]]($yes, $no)


$result = $host.ui.PromptForChoice($title, $message, $options, 0)

I can get as far as offering the list with the following

My version

After connecting.....

$title = "Azure subscriptions"
$message = "Please pick a subscription"
$all_subscriptions = Get-AzureRmSubscription
$options = [System.Management.Automation.Host.ChoiceDescription[]]($all_subscriptions.name)
$result = $host.ui.PromptForChoice($title, $message, $options, 0)

I'm aware this is missing the part of the code that specifies the choice which in the example is this 

New-Object system.Management.Automation.Host.ChoiceDescription "&Yes", `
    "Deletes all the files in the folder."`

I've tried a foreach loop using the $all_subscriptions.name but this (at least how I done this) doesn't seem to work. Can anyone point me in the right direction here. Is PromptForChoice even the right way to do this?

TLDR;

How do I build a dynamic list a user can select from using PromptForChoice within powershell

Solution

  • Assuming you have less than 10 choices to pick from, you can prepend &N and generate the choice descriptions on the fly with hot keys then numbered 1 - 9:

    $choiceIndex = 1
$options = $all_subscriptions |ForEach-Object {
    New-Object System.Management.Automation.Host.ChoiceDescription "&$($choiceIndex++) - $($_.Name)"
}
$chosenIndex = $host.ui.PromptForChoice($title, $message, $options, 0)
$SubscriptionToUse = $all_subscriptions[$chosenIndex]