Adding ability to cancel a running PowerShell operation (using System.Management.Automation in VB.NET)

Question

Hi

I use code such as the (simplified) example below to run a PowerShell command in my VB app using System.Management.Automation.

I need to be able to add the ability to cancel a long running operation once it has started, does the below support the use of CancellationToken or similar, if so how? or if not how can I modify the below so if I click a cancel button on my form it would stop the operation?

Thanks

Private Async Sub btn_Click(sender As Object, e As EventArgs) Handles btn.Click  
  
        Dim computers As New List(Of String)({"PC1", "PC2", "PC3"}) ' this is just example, real code could have hundreds of computers  
  
        Using ps As PowerShell = PowerShell.Create()  
  
            ps.AddCommand("Test-Connection").AddParameter("ComputerName", computers).AddParameter("Count", 1)  
  
            Dim output As New PSDataCollection(Of PSObject)()  
            AddHandler output.DataAdded, AddressOf Output_DataAdded  
  
            AddHandler ps.Streams.Error.DataAdded, AddressOf Error_DataAdded  
  
            Dim results As PSDataCollection(Of PSObject) = Await Task.Run(Function() ps.InvokeAsync(Of PSObject, PSObject)(Nothing, output))  
  
        End Using  
  
    End Sub  

Answer 1

Hi there,

You can add Stop-Process at the end of the script.

The Stop-Process cmdlet stops one or more running processes. You can specify a process by process name or process ID (PID), or pass a process object to Stop-Process. Stop-Process works only on processes running on the local computer.

Stop-Process

https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/stop-process?view=powershell-7.2

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Answer 2

The answer on the page below solved my problem

https://stackoverflow.com/a/38769801/9294915