Reading Powershell Progress Bar Output in C#

Question

I have a program that is calling a powershell script from an event handler. The powershell script is provided by a third party, and I do not have any control over it.

T

Answer 1

You need to add an event handler for the DataAdded event to the Progress stream of your PowerShell instance:

using (PowerShell psinstance = PowerShell.Create())
{ 
    psinstance.AddScript(@"C:\3rd\party\script.ps1");
    psinstance.Streams.Progress.DataAdded += (sender,eventargs) => {
        PSDataCollection<ProgressRecord> progressRecords = (PSDataCollection<ProgressRecord>)sender;
        Console.WriteLine("Progress is {0} percent complete", progressRecords[eventargs.Index].PercentComplete);
    };
    psinstance.Invoke();
}

(you can of course substitute the lambda expression in my example with a delegate or a regular event handler should you want to)