如何使用LINQ to LDAP获取活动目录中的用户列表？

Question

I want to access to ActiveDirectory using LINQ to LDAP and I want to Get List of All users in that
how can I do that?

Answer 1

You can try something like below.

using ActiveDs;
using BdsSoft.DirectoryServices.Linq;
using System.Linq.Expressions;
using System.DirectoryServices;

[DirectorySchema( "user", typeof( IADsUser ) )]
class User
{
    public string Name { get; set; }

    public string sAMAccountName { get; set; }

    public string objectCategory { get; set; }

    public string mail { get; set; }

    public string Description { get; set; }

    [DirectoryAttribute( "PasswordLastChanged", DirectoryAttributeType.ActiveDs )]
    public DateTime PasswordLastSet { get; set; }

    [DirectoryAttribute("distinguishedName")]
    public string Dn { get; set; }

    [DirectoryAttribute("memberOf")]
    public string[] Groups { get; set; }

}

Use this code to access AD from a console app, placing your AD server in the below code:

static void Main( string[] args )
{

    IEnumerable<User> users = GetADUsers();

    Console.WriteLine( "Users: " + users.Count().ToString() );

}

static DirectoryEntry ROOT = new DirectoryEntry( "LDAP://MyADDomainLocation.com" );

private static IEnumerable<User> GetADUsers()
{
    IEnumerable<User> users;

    var usersDS = new DirectorySource<User>( ROOT, SearchScope.Subtree );

            users = from usr in usersDS
                    where usr.Name == "A*" // FIlter A then any character(s)
                    select usr;

     users = users.OrderBy( user => user.Name ).ToList(); // Sort them alphabetically by name.

    return users;
}

For more information check Get All Users using C# with Linq To Active Directory

and LINQ to LDAP

For .NET Core or Standard , please see Chris D's answer , below.

For get comprehensive knowledge about this subject check (Almost) Everything In Active Directory via C#

I hope this will help to you.

Answer 2

Sorry to reply to such an old question, but I felt it needed an updated answer. I wrote a .NET Standard library for this:

• Linq2Ldap.Core ( NuGet , GitHub ) The platform-independent core library that can translate from Expressions into LDAP filters, and parse them back out, again.

It has two wrapper libraries for Active Directory:

• Linq2Ldap.Protocols ( NuGet , GitHub ) - A thin wrapper around Linq2Ldap.Core + System.DirectoryServices.Protocols.
• Linq2Ldap ( NuGet , GitHub ) - A thin wrapper for System.DirectoryServices.

The heart of it can transpile between Expression<Func<T, bool>> s and LDAP filters. The models ( T ) referenced by the Expressions must implement an interface, IEntry , that basically defines a fancy indexer class that you'd use like this: m => m["cn"] == "someuser" . You can also create special properties to alias your directory attributes, too. Please see the project wiki for more info.