Log handled exception in AJAX request to ELMAH

HandleAjaxErrorAttribute.cs

using System.Net;
using System.Web.Mvc;

namespace MyApp.Web.PresentationLogic.ActionFilters
{
  public class HandleAjaxErrorAttribute : HandleErrorAttribute
	{
		public override void OnException(ExceptionContext filterContext)
		{
			if (!filterContext.RequestContext.HttpContext.Request.IsAjaxRequest())
			{
				base.OnException(filterContext);

				return;
			}
			else
			{
				if (filterContext.HttpContext.IsDebuggingEnabled)
				{
					return;
				}

				filterContext.ExceptionHandled = true;
				filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
				filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.BadRequest;
				filterContext.HttpContext.Response.StatusDescription = filterContext.Exception.Message;

				Elmah.ErrorSignal.FromCurrentContext().Raise(filterContext.Exception);
			}
		}
	}
}