How do I return a Json object from Action Attribute?

Question

when overriding OnActionExecuting, how do I return a Json result without passing to action?

Answer 1

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
   if (/* whatever */)
   {
      var result = new JsonResult();
      result.Data = /* json data */;
      filterContext.Result = result;
      return;
   }

   base.OnActionExecuting(filterContext);
   return;
}