ASP.NET MVC “Ajax.BeginForm” executes OnSuccess even though model is not valid

Question

I have a \"submit feedback\" form which uses \"Ajax.BeginForm\" to render a partial containing the form elements. The OnSuccess event is triggering even if the ModelState is

Answer 1

I return a bad request instead of the View to ensure that the ajax call returns onfail and not onsuccess.

In the xhr.statustext you can find the string written in the bad request and manage correctly the onfail event.

Server side:

if (!ModelState.IsValid)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest, "Model not valid");
        }

Client side:

$.ajax({
        url: '',
        method: 'POST'            
       }).fail(function (xhr) {
           alert(xhr.statustext);
       });