How can I use Dependency Injection in a .Net Core ActionFilterAttribute?

Question

AuthenticationRequiredAttribute Class

public class AuthenticationRequiredAttribute : ActionFilterAttribute
{
    ILoginTokenKeyApi _loginTo         


        

Answer 1

Instead of resolving at construction, ActionExecutingContext.HttpContext.RequestServices should give you a reference to the request's service container at the time of the request.

So:

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    var svc = filterContext.HttpContext.RequestServices;
    var memCache = svc.GetService();
    //..etc