ASP.NET MVC Ajax Error handling

If the server sends some status code different than 200, the error callback is executed:

$.ajax({    url: '/foo',    success: function(result) {        alert('yeap');    },    error: function(XMLHttpRequest, textStatus, errorThrown) {        alert('oops, something bad happened');    }});

and to register a global error handler you could use the $.ajaxSetup() method:

$.ajaxSetup({    error: function(XMLHttpRequest, textStatus, errorThrown) {        alert('oops, something bad happened');    }});

Another way is to use JSON. So you could write a custom action filter on the server which catches exception and transforms them into JSON response:

public class MyErrorHandlerAttribute : FilterAttribute, IExceptionFilter{    public void OnException(ExceptionContext filterContext)    {        filterContext.ExceptionHandled = true;        filterContext.Result = new JsonResult        {            Data = new { success = false, error = filterContext.Exception.ToString() },            JsonRequestBehavior = JsonRequestBehavior.AllowGet        };    }}

and then decorate your controller action with this attribute:

[MyErrorHandler]public ActionResult Foo(string id){    if (string.IsNullOrEmpty(id))    {        throw new Exception("oh no");    }    return Json(new { success = true });}

and finally invoke it:

$.getJSON('/home/foo', { id: null }, function (result) {    if (!result.success) {        alert(result.error);    } else {        // handle the success    }});

After googling I write a simple Exception handing based on MVC Action Filter:

public class HandleExceptionAttribute : HandleErrorAttribute{    public override void OnException(ExceptionContext filterContext)    {        if (filterContext.HttpContext.Request.IsAjaxRequest() && filterContext.Exception != null)        {            filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.InternalServerError;            filterContext.Result = new JsonResult            {                JsonRequestBehavior = JsonRequestBehavior.AllowGet,                Data = new                {                    filterContext.Exception.Message,                    filterContext.Exception.StackTrace                }            };            filterContext.ExceptionHandled = true;        }        else        {            base.OnException(filterContext);        }    }}

and write in global.ascx:

 public static void RegisterGlobalFilters(GlobalFilterCollection filters) {      filters.Add(new HandleExceptionAttribute()); }

and then write this script on the layout or Master page:

<script type="text/javascript">      $(document).ajaxError(function (e, jqxhr, settings, exception) {                       e.stopPropagation();                       if (jqxhr != null)                           alert(jqxhr.responseText);                     });</script>

Finally you should turn on custom error.and then enjoy it :)

Unfortunately, neither of answers are good for me. Surprisingly the solution is much simpler. Return from controller:

return new HttpStatusCodeResult(HttpStatusCode.BadRequest, e.Response.ReasonPhrase);

And handle it as standard HTTP error on client as you like.