Error executing Powershell commandlets using C#

Question

I have the following code that I have tested and works:

    using (new Impersonator("Administrator", "dev.dev", #########"))
    {
        RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
        Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration);

        runspace.Open();

        RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);
        scriptInvoker.Invoke("Set-ExecutionPolicy Unrestricted");

        Pipeline pipeline = runspace.CreatePipeline();
        Command myCmd = new Command(@"C:\test.ps1");
        myCmd.Parameters.Add(new CommandParameter("upn", upn));
        myCmd.Parameters.Add(new CommandParameter("sipAddress", sipAddress));
        pipeline.Commands.Add(myCmd);

        // Execute PowerShell script
        Collection<PSObject> results = pipeline.Invoke();
    }

However, when I try to include the function in a different project so that it is called from a webservice it throws an execption:

    System.Management.Automation.CmdletInvocationException: Access to the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell' is denied. ---> System.UnauthorizedAccessException: Access to the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell' is denied.

I have no idea why this is happening. Any help would be appreciated.

What were you planning on doing with the impersonator object? Since at the moment you do not seem to be using it... — Edwin de Koning
– Edwin de Koning, Commented Jul 4, 2011 at 7:02
It was my attempt to fix the problem. It was posted as a solution for a similar problem. — Hugo
– Hugo, Commented Jul 4, 2011 at 7:14

Start-Automating · Accepted Answer · 2014-01-06 22:24:20Z

8

What's happening is that Impersonator only impersonates on the thread, and PowerShell's Runspace is running on another thread.

To make this work, you need to add:

runspace.ApartmentState = System.Threading.ApartmentState.STA;
runspace.ThreadOptions = System.Management.Automation.Runspaces.PSThreadOptions.UseCurrentThread;

just before you open the runspace.

This will force the runspace to run on the same thread as the impersonated token.

Hope this helps,

edited Jan 6, 2014 at 22:24

answered Jul 4, 2011 at 8:14

Start-Automating

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3 Comments

Start-Automating Over a year ago

Indeed I did. I fixed the answer.

Dinesh Haraveer Over a year ago

thanks for the answer. I couldn't found any namespace for the ThreadOptions.

Start-Automating Over a year ago

That's because I made a typo. The class is System.Management.Automation.PSThreadOptions

Stéphane B. · Accepted Answer · 2014-06-25 11:03:18Z

1

Use these namespaces :

using System.Management.Automation;
using System.Management.Automation.Runspaces;
using System.Threading;

Create Runspace with InitialSessionState

InitialSessionState initialSessionState = InitialSessionState.CreateDefault();
initialSessionState.ApartmentState = ApartmentState.STA;
initialSessionState.ThreadOptions = PSThreadOptions.UseCurrentThread;

using ( Runspace runspace = RunspaceFactory.CreateRunspace ( initialSessionState ) )
{
  runspace.Open();

  // scripts invocation                 

  runspace.Close();
}

edited Jun 25, 2014 at 11:03

answered Jun 25, 2014 at 10:01

Stéphane B.

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