When exactly do OnResultExecuted and OnResultExecuting fire?

Question

I\'m creating a custom ActionFilterAttribute in order to transform ViewResults and redirects into JsonResults during ajax requests. I\'ve

Answer 1

Let's take the following example which performs the transformation you described:

public class MyActionFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        if (filterContext.HttpContext.Request.IsAjaxRequest())
        {
            var result = filterContext.Result as ViewResultBase;
            if (result != null && result.Model != null)
            {
                filterContext.Result = new JsonResult
                {
                    Data = result.Model,
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };
            }
        }
    }

    public override void OnResultExecuting(ResultExecutingContext filterContext)
    {
    }

    public override void OnResultExecuted(ResultExecutedContext filterContext)
    {
    }
}

The OnResultExecuting method will be invoked immediately before the action result's ExecuteResult method runs and the OnResultExecuted method immediately after.