Question

I have stripped my getJSON call to the simplest example possible trying to figure out why it’s not working but I’m out of ideas. I currently have:

public JsonResult MyAction()
{
    return Json(new { status = "OK" });
}

$.getJSON('MyController/MyAction', function(result) { alert('worked'); });

The action is called, but the alert does not get fired and looking in Chrome developer tools I see a Status 500 error code is returned. What can possibly be causing this? How can I debug it?

Answer 1

By default MVC 2.0 blocks GET requests to actions that return a JsonResult.

Use JsonRequestBehavior.AllowGet to force the issue, or use POST.

public JsonResult MyAction()
{
    return Json(new { status = "OK" }, JsonRequestBehavior.AllowGet);
}

Or use post:

$.post('MyController/MyAction', function(result) {
    alert('worked');
});