Acho q acabou

GerenciaProjetos/Filters/LoginFilterAttribute.cs

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+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace GerenciaProjetos.Filters
+{
+    public class LoginFilterAttribute : Attribute, IActionFilter
+    {
+        public bool Restrito { get; set; }
+
+        public void OnActionExecuted(ActionExecutedContext context)
+        {
+            int? IdUsuario = context.HttpContext.Session.GetInt32("Id");
+
+            if (IdUsuario == null)
+            {
+                context.Result = new RedirectToRouteResult(new { controller = "Home", action = "Index" });
+            }
+            else if (context.HttpContext.Session.GetInt32("EAdmin") != 1 && Restrito)
+            {
+                context.Result = new RedirectToRouteResult(new
+                {
+                    controller = "Dashboard",
+                    action = "Index"
+                });
+            }
+        }
+
+        public void OnActionExecuting(ActionExecutingContext context)
+        {
+
+        }
+    }
+}