How to have the $Env variable available in the script?

Question

I am executing a powershell script using C#, but when I try to get an environment variable inside the powershell script it does not work.

If I run the powershell script manually using the console it works.

Do you have any idea on how to solve this issue ?

Code sample for C#:

Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();

// set directory for ps
if (!string.IsNullOrEmpty(sessionPath))
    runspace.SessionStateProxy.Path.SetLocation(sessionPath);

Pipeline pipeline = runspace.CreatePipeline();
Command command = new Command(script, false);
pipeline.Commands.Add(command);
pipeline.Commands.Add("Out-String");
pipeline.InvokeAsync();

script powershell:

$path = $env:PATH;
write-output $path # this is empty ! $env does seems to exist in the runspace ?

I found a workaround by using the script [here](http://stackoverflow.com/a/14382047/1832488) but I would prefer to find how to configure the runspace so the Env variable is set. — codea, Nov 28 '13 at 17:26

score 0 · Answer 1 · answered Nov 28 '13 at 16:20

Maybe you could try this code instead in your PowerShell script. This should work regardless of how the script is invoked:

$path = [environment]::GetEnvironmentVariable("Path")
write-output $path

More info on environment variable manipulation of this kind can be found here.

score 0 · Answer 2 · edited May 26 '20 at 15:41

0

The only thing that springs to mind is that you are not passing in a configuration when creating the run space.

var config = RunspaceConfiguration.Create();
var runspace = RunspaceFactory.CreateRunspace(config);

The only thing I've done hosting Powershell was writing unit tests for a Powershell plugin. Code is here: https://github.com/openxtra/TimeTag/tree/master/Test

See DatabasePoSHSnapInTest and PowerStatsPoSHSnapInTest folders for the test projects.

edited May 26 '20 at 15:41

LarsTech

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answered Nov 28 '13 at 16:29

Jack Hughes

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Did not work either when I create a new configuration and I pass it to my runspace. – codea Nov 28 '13 at 17:21

score 0 · Accepted Answer · answered Nov 29 '13 at 01:29

0

Change this line:

Command command = new Command(script, false);

to

Command command = new Command(script, true);

Your script variable is a script (multiple commands). By passing false, PowerShell thinks that script names a command.

answered Nov 29 '13 at 01:29

Keith Hill

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I am passing a .ps1 file path as a command, if I use (script,true) it does not work. – codea Dec 11 '13 at 11:44
To make it work, I read the file as string first, then I used Command command = new Command(script, true); – codea Dec 11 '13 at 11:53

How to have the $Env variable available in the script?

3 Answers3