Powershell Script invoking async method?

Question

I need to invoke an async method of a CLR type like this:

$tokenTask = $tokenProvider.AcquireAccessToken()
$tokenTask.Wait()
Write-Output "Token: $($tokenTask.Result)"

This in not working since it for some reason cannot successfully invoke Wait:

Exception calling "Wait" with "0" argument(s): "One or more errors occurred."
At D:\UserManagement\STP.UserManagement.Identity.Client\STP.UserManagement.Identity.Client.Sample\authenticate.ps1:8 char:1
+ $tokenTask.Wait()
+ ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : AggregateException

How can I wait and get the result of my async method? Is there a keyword like await in PowerShell?

halllo · Accepted Answer · 2019-10-16 10:00:40Z

1

My problem was that my task was Faulted right from the start because of missing Add-Type for another assembly. I found it like this:

$tokenTask = $tokenProvider.AcquireAccessToken()
Write-Output "authenticating... ($($tokenTask.Status), $($tokenTask.Exception))"
$tokenTask.Wait()
Write-Output "authenticated ($($tokenTask.Status), $($tokenTask.Exception))"

answered Oct 16, 2019 at 10:00

halllo

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