What is the best way to globally catch ajax errors in asp.net-mvc?

Question

I find myself putting this (simplified) code in a number of different javascript files:

 $(document).ajaxError(function (e, xhr, settings, exception) {
     alert('error in: ' + 
                         settings.url + ' \\n' + 
                         'error:\\n' + exception + 
                         ": " + xhr.responseText
          );
 });

is there any downside that someone can think of by just putting this in my Site.Master file once so I have a consistent solution to errors?. If I do that, is there anyway to override the behavior on a specific page?

showing the url or the exception to the end user does not make any sense... just show the error message from the server — Arun P Johny
– Arun P Johny, Commented Aug 26, 2013 at 16:47

Karl Anderson · Accepted Answer · 2013-08-26 17:33:01Z

1

Use $(document).ajaxError in your Site.Master file.

To override this in a specific instance, then just include the error callback on individual AJAX calls, like this:

$.ajax({
    url: '/yourUrl',
    success: function(result) {
        alert('It worked!');
    },
    error: function(XMLHttpRequest, textStatus, errorThrown) {
        alert('Your custom error message here.');
    }
});

For those that you do not want to override, them omit the error callback.

edited Aug 26, 2013 at 17:33

answered Aug 26, 2013 at 16:54

Karl Anderson

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2 Comments

leora Over a year ago

out of curiosity, What is the difference between the ajaxSetup() versus just having the $(document).ajaxError call directly as I have in the above question?

Karl Anderson Over a year ago

Wow, just read the documentation for this and it appears that using jQuery .ajaxSetup({error:{); is considered a bad practice and it is encouraged to use the $(document).ajaxError handler instead, I am updating my answer to reflect that.

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