Check policy action filter that uses ModelState to bind values to it

CheckPolicyFilterFactoryAttribute.cs

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using System;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;

namespace Performa365.Web.Utils.Filters
{
    public class CheckPolicyFilter : IAsyncActionFilter
    {
        private readonly IAuthorizationService _authorizationService;

        private readonly string _policyName;

        public CheckPolicyFilter(IAuthorizationService authorizationService, string policyName)
        {
            this._authorizationService = authorizationService;
            this._policyName = policyName;
        }

        public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
        {
            var ctrl = ((Controller)context.Controller);

            var result = await this._authorizationService.AuthorizeAsync(
                ctrl.User,
                context.ModelState,
                this._policyName);

            if (result.Succeeded)
                return;

            context.Result = new ChallengeResult();
        }
    }

    public class CheckPolicyFilterFactoryAttribute : Attribute, IFilterFactory
    {
        private readonly string _policyName;

        public bool IsReusable => false;

        public CheckPolicyFilterFactoryAttribute(string policyName)
        {
            this._policyName = policyName;
        }

        public IFilterMetadata CreateInstance(IServiceProvider serviceProvider)
        {
            var authorizationService = serviceProvider.GetService<IAuthorizationService>();

            return new CheckPolicyFilter(authorizationService, this._policyName);
        }
    }
}