//
// Copyright (c) 2006 Microsoft Corporation. All rights reserved.
// 
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
// PARTICULAR PURPOSE.
//
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Management.Automation;
using System.Management.Automation.Host;
using System.Management.Automation.Runspaces;

namespace Microsoft.Samples.PowerShell.Runspaces
{
    using PowerShell = System.Management.Automation.PowerShell;

    class Runspace03
    {
        /// <summary>
        /// This sample uses the PowerShell class to execute
        /// a script that retrieves process information for the
        /// list of process names passed into the script.
        /// It shows how to pass input objects to a script and
        /// how to retrieve error objects as well as the output objects.
        /// </summary>
        /// <param name="args">Unused</param>
        /// <remarks>
        /// This sample demonstrates the following:
        /// 1. Creating an instance of the PowerSHell class.
        /// 2. Using this instance to execute a string as a PowerShell script.
        /// 3. Passing input objects to the script from the calling program.
        /// 4. Using PSObject to extract and display properties from the objects
        ///    returned by this command.
        /// 5. Retrieving and displaying error records that were generated
        ///    during the execution of that script.
        /// </remarks>
        static void Main(string[] args)
        {
            // Define a list of processes to look for
            string[] processNames = new string[] {
                "lsass", "nosuchprocess", "services", "nosuchprocess2" };

            // The script to run to get these processes. Input passed
            // to the script will be available in the $input variable.
            string script = "$input | get-process -name {$_}";

            // Create an instance of the PowerShell class.
            PowerShell powershell = PowerShell.Create().AddScript(script);

            Console.WriteLine("Process              HandleCount");
            Console.WriteLine("--------------------------------");

            // Now invoke the PowerShell and display the objects that are
            // returned...

            foreach (PSObject result in powershell.Invoke(processNames))
            {
                Console.WriteLine("{0,-20} {1}",
                    result.Members["ProcessName"].Value,
                    result.Members["HandleCount"].Value);
            }

            // Now process any error records that were generated while running the script.
            Console.WriteLine("\nThe following non-terminating errors occurred:\n");
            PSDataCollection<ErrorRecord> errors = powershell.Streams.Error;
            if (errors != null && errors.Count > 0)
            {
                foreach (ErrorRecord err in errors)
                {
                    System.Console.WriteLine("    error: {0}", err.ToString());
                }
            }
            System.Console.WriteLine("\nHit any key to exit...");
            System.Console.ReadKey();
        }
    }
}