C# get variable from powershell script

Question

How can I get the powershell variable $test from a c# application?

I tried it like this:

RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration);
runspace.Open();

RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);

Pipeline pipeline = runspace.CreatePipeline();
//Here's how you add a new script with arguments
Command myCommand = new Command(scriptFile);
CommandParameter testParam = new CommandParameter("key", "value");
CommandParameter testParam2 = new CommandParameter("key", "value");
CommandParameter testParam3 = new CommandParameter("key", "value");
myCommand.Parameters.Add(testParam);
myCommand.Parameters.Add(testParam2);
myCommand.Parameters.Add(testParam3);

pipeline.Commands.Add(myCommand);

// Execute PowerShell script
var results = pipeline.Invoke();
var resultVariable = runspace.SessionStateProxy.PSVariable.GetValue("test");

resultVariable is null. But I filled it in powershell with an int (i.e. $test = 4).

Don't you need to use GetValue("$test") (with a $) instead? — oɔɯǝɹ
– oɔɯǝɹ, Commented Jan 23, 2015 at 12:01
This doesn't work either... I can call the function with the variable PSHome, this works. But not the variable I have set. — greenhoorn
– greenhoorn, Commented Jan 23, 2015 at 12:02
Might be a duplicate of: stackoverflow.com/questions/17467629/… — David Brabant
– David Brabant, Commented Jan 23, 2015 at 12:05
It's not. I have seen this post but the answer does not work. — greenhoorn
– greenhoorn, Commented Jan 23, 2015 at 12:07

user4003407 · Accepted Answer · 2015-01-23 12:41:15Z

3

Use $global:test=4 in script or run script in same scope. By default script run in its own scope, so any variable changed in script does not visible outside.

answered Jan 23, 2015 at 12:41

user4003407

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