.net core过滤器中判断controller或者Action是否包含某个属性

 public override void OnActionExecuting(ActionExecutingContext context)
        {
            bool isNoPermissionRequired = false;
            //获取请求进来的控制器与方法
            var controllerActionDescriptor = context.ActionDescriptor as ControllerActionDescriptor;
            if (controllerActionDescriptor != null)
            {
                //判断请求的控制器有没有NoPermissionRequiredAttribute（不需要权限判断）
                isNoPermissionRequired = controllerActionDescriptor.ControllerTypeInfo.IsDefined(typeof(NoPermissionRequiredAttribute), true);
                if (!isNoPermissionRequired)
                {
                    //判断请求的方法有没有NoPermissionRequiredAttribute
                    isNoPermissionRequired = controllerActionDescriptor.MethodInfo.IsDefined(typeof(NoPermissionRequiredAttribute), true);
                }
            }
            //需要权限
            if (isNoPermissionRequired)
            {
                return；
            }

　　　//auth success,do other things
           base.OnActionExecuting(context);
        }

 public class NoPermissionRequiredAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext context)
        {
            base.OnActionExecuting(context);
        }
    }