How to add Roles to Windows Authentication in ASP.NET Core

Question

I created an asp.net core project in visual studio 2015 with windows authentication. I can\'t figure out how to add roles to the Identity.

I have a table with usernames

Answer 1

this is working code that I use to check is a user is in a role \ group, please use it at your leisure

using System.Collections.Generic;
using System.DirectoryServices.AccountManagement;
using System.Linq;
using System.Security.Principal;

namespace Santander.IsUserInGroupOrRole_cs
{

public class IsUserInRole
{
    public static bool IsInGroup(string groupName)
    {
        var myIdentity = GetUserIdWithDomain();
        var myPrincipal = new WindowsPrincipal(myIdentity);
        return myPrincipal.IsInRole(groupName);
    }

    public bool IsInGroup(List groupNames)
    {
        var myIdentity = GetUserIdWithDomain();
        var myPrincipal = new WindowsPrincipal(myIdentity);

        return groupNames.Any(group => myPrincipal.IsInRole(group));
    }

    public static WindowsIdentity GetUserIdWithDomain()
    {
        var myIdentity = WindowsIdentity.GetCurrent();
        return myIdentity;
    }

    public static string GetUserId()
    {
        var id = GetUserIdWithDomain().Name.Split('\\');
        return id[1];
    }

    public static string GetUserDisplayName()
    {
        var id = GetUserIdWithDomain().Name.Split('\\');

        var dc = new PrincipalContext(ContextType.Domain, id[0]);
        var adUser = UserPrincipal.FindByIdentity(dc, id[1]);
        return adUser.DisplayName;

    }
}
}