C# Powershell executing custom function from script file

Question

I have a powershell script file that contains multiple functions. I would like to call one of the functions using C#. When I invoke my command, it throws an error

    "The term 'LogIn-System' is not recognized as the name of a cmdlet, 
function, script file, or operable program. Check the spelling of the name, 
or if a path was included, verify that the path is correct and try again."

Here is some sample code:

using (PowerShell powerShellInstance = PowerShell.Create())
{
   powerShellInstance.Runspace = runSpace;

   powerShellInstance
     .AddScript("myfunctions.ps1")
     .Invoke();
   powerShellInstance
     .AddCommand("LogIn-System")
     .AddParameter("SystemName", "Connect");
   Collection<PSObject> PSOutput = await Task.Run(() => 
     powerShellInstance.Invoke());
}

AddScript() should be commands instead of a path. Try either dot-sourcing with .AddScript(".\myfunctions.ps1") or use Import-Module like .AddScript("Import-Module myfunctions.ps1") instead. Or check out one of the other suggestions in this question: stackoverflow.com/questions/6266108 — Cpt.Whale
– Cpt.Whale, Commented Jul 29, 2021 at 16:21

user16554958 · Accepted Answer · 2021-08-03 20:15:41Z

0

You have to use two separate invokes. One to import the module, the second is your script. Since Import-Module is a Command from a previous loaded module, call it with AddCommand. Specify the Module name to import with the AddParameter function. For example:

PS
   .AddCommand("Import-Module")
   .AddParameter("Name", "ExchangeOnlineManagement")
   .Invoke();

PS
   .AddScript([your script name])
   .Invoke();

answered Aug 3, 2021 at 20:15

user16554958

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