using System.Web.Mvc;
using System.Web.Mvc.Ajax;

namespace ChadSoft.Web.Mvc.Filters
{
    public class EnablePartialRenderingAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            // We only care about AJAX requests, so if this isn't one, just return
            if (!filterContext.HttpContext.Request.IsMvcAjaxRequest())
                return;

            // Grab the existing result and cast it to a ViewResult
            var result = filterContext.Result as ViewResult;

            // Replace the result with a PartialViewResult
            filterContext.Result = new PartialViewResult
            {
                TempData = result.TempData,
                ViewData = result.ViewData,
                ViewName = string.Format("Partial_{0}", result.ViewName)
            };
        }

    }
}