Throw an exception from an ajax request and catching it

Question

i am trying to simulate exception management in ASP MVC,

Here is what i have:

public JsonResult callit()
{
        throw new HttpException(400, "Bad Request");
}

and then i try to call it like this:

$.ajax({
        type: 'GET',
        url: '@Url.Action("callit", "rat", new { area = "test" })',
        cache: 'false',
        error: function (request, status, error) {
            alert(request.responseText);
        }
});

But my application keeps on stopping when the exception is thrown and my error is not being triggered unless i stop the program. What should i do?

You can write an action filter to handle exceptions. http://stackoverflow.com/questions/4707755/asp-net-mvc-ajax-error-handling — Uber Bot, Oct 13 '15 at 23:05
@StephenMuecke i get red lines stating i cannot explicitly convert type web exception to jsonresult — Carlos Miguel Colanta, Oct 13 '15 at 23:08
Because `JsonResult` is a specific type of `ActionResult` which requires you to use `return Json(..)` - refer the [inheritance hierarchy here](https://msdn.microsoft.com/en-us/library/system.web.mvc.actionresult(v=vs.118).aspx) — , Oct 13 '15 at 23:15
Ah alright, please post an answer so i can accept it. thanks for the help. — Carlos Miguel Colanta, Oct 13 '15 at 23:16

score 3 · Accepted Answer · answered Oct 13 '15 at 23:25

Rather than throwing an exception, return a HttpStatusCodeResult and change you method to ActionResult

public ActionResult callit() // or public HttpStatusCodeResult callit()
{  
    return new HttpStatusCodeResult(400, "Bad Request");
}

Throw an exception from an ajax request and catching it

1 Answers1