CODEWITHSUNDEEP
c#powershellpipeline
Sam Stephenson
Sam Stephenson

Reputation: 5190

Pass multiple variables to PowerShell from C#

I'm invoking a PowerShell script from C#, I'm using a hashtable to pass through parameters however when it comes to invoking the PowerShell script I get

A positional parameter cannot be found that accepts argument

The PowerShell script has two parameters. The hashtable has two keys with one value each. PowerShell script below:

param([string]$username,[string]$path)
#Gets SID
$objUser = New-Object System.Security.Principal.NTAccount($username)
$strSID = $objUser.Translate([System.Security.Principal.SecurityIdentifier])
$SID = $strSID.Value
# delets user
net user $username /DELETE
# removes folder
rmdir /q $path
Remove-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\$SID"

C# that calls the PowerShell script:

class RunScript
{
    public static void FireScript(String script, Hashtable var)
    {
        RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
        Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration);
        runspace.Open();
        RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);

    Pipeline pipeline = runspace.CreatePipeline();

    String scriptfile = "..\\..\\Resources\\" + script + ".ps1";

    Command myCommand = new Command(scriptfile, false);

    foreach (DictionaryEntry entry in var)
    {
        CommandParameter testParam = new CommandParameter(entry.Key.ToString(),entry.Value);

        //CommandParameter testParam = new CommandParameter(null, entry.Value);
        myCommand.Parameters.Add(testParam);
    }

    pipeline.Commands.Add(myCommand);
    Collection<PSObject> psObjects;
    psObjects = pipeline.Invoke();
    runspace.Close();
}
}

Code that calls firescript:

Hashtable var = new Hashtable();
var.Add("username","testb");
var.Add("path", "C:\\Documents and Settings\\testb");
RunScript.FireScript("remove user",var);

Upvotes: 2

Views: 3490

Answers (1)

lex87
lex87

Reputation: 1326

I think that you need to set this parameter attribute: ValueFromPipeline which conform to this link represents an 'Optional named parameter. True indicates that the cmdlet parameter takes its value from a pipeline object. Specify this keyword if the cmdlet accesses the complete object, not just a property of the object. The default is false.'

You can check also check this link for some examples. The code could be like this:

param(
      [parameter(Position=0, ValueFromPipeline=$true)][string]$username
      [parameter(Position=1, ValueFromPipeline=$true)][string]$path
     )

Upvotes: 0

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