Ticket/Filters/LoginFilter.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Ticket.Model.Filters
{
    public class LoginFilter : AuthorizeAttribute
    {
        public override void OnAuthorization(AuthorizationContext filterContext)
        {
            var canAnonymous = filterContext.ActionDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true);
            if (!canAnonymous)
            {
                var isLogin = filterContext.RequestContext.HttpContext.Session["isLogin"];
                if (isLogin == null)
                {
                    filterContext.Result = new RedirectResult("/User/Login");
                }
            }

        }
    }
}