如何从Action Attribute返回Json对象？

Question

当重写OnActionExecuting时,如何在不传递操作的情况下返回Json结果？

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;
}