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How to built-in sort generic collection using one of the attribute?

lapucca
lapucca asked
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Last Modified: 2014-12-23
Hi, I'm using vs2012
I have a collection, List<UserPrincipal>.  How can I use the the buit-in collection Sort function to sort the collection based on one of the attribute of UserPrincipal (SamAccountName)?  Looked at MSDN but didn't see any example code on how to do this.

Thank you.
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it_saigeDeveloper
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Distinguished Expert 2019

Commented:
This works for me:
using System;
using System.Collections.Generic;
using System.DirectoryServices.AccountManagement;
using System.Linq;

namespace EE_Q28585582
{
	class Program
	{
		private static List<UserPrincipal> users = new List<UserPrincipal>();

		static void Main(string[] args)
		{
			PrincipalContext context = new PrincipalContext(ContextType.Domain);
			UserPrincipal user = new UserPrincipal(context);
			PrincipalSearcher searcher = new PrincipalSearcher(user);
			foreach (Principal result in searcher.FindAll())
			{
				UserPrincipal upe = result as UserPrincipal;
				if (upe != null)
					users.Add(upe);
			}

			foreach (UserPrincipal up in users)
				Console.WriteLine(up.Name);
			Console.ReadLine();

			var usort = (from up in users orderby up.SamAccountName select up);
			foreach (UserPrincipal up in usort)
				Console.WriteLine(up.Name);
			Console.ReadLine();
		}
	}
}

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-saige-
Senior Systems and Integration Developer
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Commented:
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Top Expert 2015

Commented:
*No Points*

Slightly shorter version of Carl's suggestion:

list.Sort((left, right) => string.Compare(left.SAMAccountName, right.SAMAccountName));

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Author

Commented:
Carl,
That works great thank you.
Kaufmed, Your loc gives red underline.  Error message says can't convert because it's not delegate.
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Most Valuable Expert 2011
Top Expert 2015

Commented:
It's possible you may need to include the type as well--usually you don't have to.

e.g.

list.Sort((UserPrincipal left, UserPrincipal right) => string.Compare(left.SAMAccountName, right.SAMAccountName));

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Most Valuable Expert 2011
Top Expert 2015

Commented:
That's what I get for trying to do it from memory  ; )

Corrected:

s.Sort((left, right) => { return string.Compare(left.SamAccountName, right.SamAccountName); });

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Author

Commented:
Hi, I have a new question related to this one, ID: 28586081
Appreciate it if you can have a look.

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