Get Active Directory User’s GUID and SID in C#? (Part 2)

Yesterday we learned how to Get the Current User’s Active Directory info. Today we will learn how to get a named user’s Active Directory info?

Get a named User’s Active Directory info?

The first steps are the same as yesterday.

Step 1 – Create a new Console Application project in Visual Studio.

Step 2 – Add a .NET reference to System.DirectoryServices.AccountManagement.

Step 3 – Populate the Main Method as shown below.

using System;
using System.DirectoryServices.AccountManagement;

namespace NamedUserAdInfo
{
    class Program
    {
        static void Main(string[] args)
        {
            string userName = "Rhyous";
            PrincipalContext context = new PrincipalContext(ContextType.Domain);
            UserPrincipal user = UserPrincipal.FindByIdentity(context, userName);
            Console.WriteLine("Name: " + user.Name);
            Console.WriteLine("User: " + user.UserPrincipalName);
            Console.WriteLine("GUID: " + user.Guid);
            Console.WriteLine(" SID: " + user.Sid);
        }
    }
}

The only difference between the current user and a named user is that there is a static value for the current user called UserPrincipal.Current whereas for a named user, you need the user name.

Writing a program that does both

OK, so lets make a program that takes a parameter and does both. Here it is.

using System;
using System.DirectoryServices.AccountManagement;

namespace GetAdUserInfo
{
    class Program
    {
        static UserPrincipal user = UserPrincipal.Current;

        static void Main(string[] args)
        {
            ParseArgs(args);
            OutputUserInformation();
        }
        
        private static void OutputUserInformation()
        {
            Console.WriteLine("Name: " + user.Name);
            Console.WriteLine("User: " + user.UserPrincipalName);
            Console.WriteLine("GUID: " + user.Guid);
            Console.WriteLine(" SID: " + user.Sid);
        }

        private static void ParseArgs(string[] args)
        {
            foreach (var arg in args)
            {
                if (arg.StartsWith("user=", StringComparison.CurrentCultureIgnoreCase))
                {
                    string[] splitArgs = arg.Split("=".ToCharArray());
                    string userName = string.Empty;
                    if (splitArgs.Length == 2)
                        userName = splitArgs[1];
                    if (string.IsNullOrWhiteSpace(userName))
                    {
                        Syntax();
                    }

                    // set up domain context
                    PrincipalContext ctx = new PrincipalContext(ContextType.Domain);

                    // find a user
                    user = UserPrincipal.FindByIdentity(ctx, userName);
                    continue;
                }

                if (arg.StartsWith("user=", StringComparison.CurrentCultureIgnoreCase))
                {
                    Syntax();
                }

                // if arg not found treat it like /?
                {
                    Console.WriteLine("Argument not found: " + arg);
                    Syntax();
                }
            }
        }

        private static void Syntax()
        {
            String fullExeNameAndPath = System.Reflection.Assembly.GetExecutingAssembly().Location;
            String ExeName = System.IO.Path.GetFileName(fullExeNameAndPath);
            Console.WriteLine(ExeName + " user=[username]");
        }
    }
}

Here are the sample projects.
GetAdUserInfo.zip

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