Create and use PowerShell object reference in C#

Question

I need to instantiate a new object and pass it to a command input like this:

using (var pipeline = runspace.CreatePipeline())
{
    // Create configuration object
    pipeline.Commands.AddScript(
        "$eap = New-EapConfiguration -UseWinlogonCredential");

    var cmd = new Command("Add-VpnConnection");
    // Set connection settings...
    cmd.Parameters.Add(new CommandParameter(
        "EapConfigXmlStream", "$eap.EapConfigXmlStream"));

    pipeline.Commands.Add(cmd);
    pipeline.Invoke();
}

Result:

Unable to convert "$eap.EapConfigXmlStream" in "System.Xml.XmlDocument" object type...

$eap.EapConfigXmlStream is interpreted as string, not as object reference

Any suggestion will be welcome

Edit:

@JohnB: This PS command works:

Set-VpnConnection -Name "MyVpnConnection"
    -EapConfigXmlStream (New-EapConfiguration -UseWinlogonCredential).EapConfigXmlStream

But this C# replacement does not works:

cmd.Parameters.Add(new CommandParameter("EapConfigXmlStream",
    "(New-EapConfiguration -UseWinlogonCredential).EapConfigXmlStream"));

(New-EapConfiguration -UseWinlogonCredential).EapConfigXmlStream interpreted as string

i have a feeling that the EapConfigXmlStream param is expecting an XmlDocument - at least that is what I seem to understand from reading learn.microsoft.com/en-us/powershell/module/vpnclient/… — jazb
– jazb, Commented Aug 8, 2019 at 7:36

Falco Alexander · Accepted Answer · 2019-08-08 09:02:12Z

1

it should work like this. CommandParameter(String, Object) expects an object, but you pass a string "EapConfigXmlStream", "$eap.EapConfigXmlStream"

Pass a PSObject instead:

    Runspace runspace = RunspaceFactory.CreateRunspace();
    runspace.Open();
    Collection<PSObject> configXML;

    using (var pipeline = runspace.CreatePipeline())
    {
        pipeline.Commands.AddScript(
            "(New-EapConfiguration -UseWinlogonCredential).EapConfigXmlStream");
        configXML = pipeline.Invoke();
    }

    using (var pipeline = runspace.CreatePipeline())
    {
        var cmd = new Command("Add-VpnConnection");
        cmd.Parameters.Add(new CommandParameter(
            "EapConfigXmlStream", configXML[0]));
        pipeline.Commands.Add(cmd);
        pipeline.Invoke();
    }

answered Aug 8, 2019 at 9:02

Falco Alexander

3,4122 gold badges26 silver badges45 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

alex Over a year ago

Thank you very much for your help. I am trying it... Is it possible to keep the same pipeline and do not export object in C# context and import again in PS context ? Just create an object reference and use it (always stay in PS context)

Falco Alexander Over a year ago

not so sure, I did a quick test and it won't let me Invoke the pipeline twice. There will probably be a more elegant way.

alex Over a year ago

Your solution works perfectly. I exported New-EapConfiguration instead and use cmd.Parameters.Add("EapConfigXmlStream", config.Properties["EapConfigXmlStream"].Value);

Collectives™ on Stack Overflow

Create and use PowerShell object reference in C#

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related