Problem with calling a powershell function from c#

Question

I\'m trying to call a function in a powershell file as follows:

    string script = System.IO.File.ReadAllText(@\"C:\\Users\\Bob\\Desktop\\CallPS.ps1\");

           


        

Answer 1

This seems to work for me:

using (Runspace runspace = RunspaceFactory.CreateRunspace())
{
    runspace.Open();
    PowerShell ps = PowerShell.Create();
    ps.Runspace = runspace;
    ps.AddScript(script);
    ps.Invoke();
    ps.AddCommand("BatAvg").AddParameters(new Dictionary<string, string>
    {
        {"Name" , "John"},
        {"Runs", "6996"},
        {"Outs","70"}
    });

    foreach (PSObject result in ps.Invoke())
    {
        Console.WriteLine(result);
    }
}

Answer 2

The solution can be simplified further as in this case a non-default Runspace is not needed.

var ps = PowerShell.Create();
ps.AddScript(script);
ps.Invoke();
ps.AddCommand("BatAvg").AddParameters(new Dictionary<string, string>
{
     {"Name" , "John"}, {"Runs", "6996"}, {"Outs","70"}
});
foreach (var result in ps.Invoke())
{
     Console.WriteLine(result);
}

One other pitfall would be to use AddScript(script, true) in order to use a local scope. The same exception would be encountered (i.e. "The term 'BatAvg' is not recognized as the name of a cmdlet, function, script file, or operable program.").

Answer 3

As it seems the Runspace need to be connected to a Powershell to make that work - see the sample code at MSDN.