Page is not redirecting to the login page while using Authorization Filter - asp.net-mvc

Question

I have created an AuthorizationFilter to check authorization while accessing action methods. The code is below:
public class MyAuthorizeActionFilter : IAuthorizationFilter
{
private readonly int _userAge;
public MyAuthorizeActionFilter(int userAge)
{
_userAge = userAge;
}
public void OnAuthorization(AuthorizationFilterContext context)
{
bool isAuthorized = CheckUserPermission(context.HttpContext.User, _userAge);
if (!isAuthorized)
{
context.Result = new UnauthorizedResult();
}
}
private bool CheckUserPermission(ClaimsPrincipal user, int age)
{
if (user.Claims == null || !user.Claims.Any())
return false;
var dob = Convert.ToDateTime(user.FindFirst(ClaimTypes.DateOfBirth).Value);
var years = DateTime.Today.Year - dob.Year;
return years >= age;
}
}
Then I have created an Authorize Attribute, which is below:
public class MyAuthorizeAttribute : TypeFilterAttribute
{
public MyAuthorizeAttribute(int age) : base(typeof(MyAuthorizeActionFilter))
{
Arguments = new object[] { age };
}
}
I used the above authorize attribute in my controller action method.
[MyAuthorize(21)]
public IActionResult Index()
{
return View();
}
Now the problem is when unauthorize, the system doesn't redirect to the login page. Though I put the below code in ConfigureService method in the startup class.
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
.AddCookie(options =>
{
options.Cookie.Name = "_auth";
options.LoginPath = new PathString("/account/login");
options.LogoutPath = new PathString("/account/logout");
options.AccessDeniedPath = new PathString("/account/login");
});
Can any body help me to redirect to the login page when the page is unauthorize.

Answer 1

In OnAuthorization after checking the authorization, we can redirect to the account/login page with below code.
context.Result = new RedirectResult("~/account/login");
OR
context.Result = new RedirectToRouteResult(
new RouteValueDictionary(
new
{
controller = "account",
action = "login"
}));