Question

I have the following js code:

var ret;

$.ajax({
    type: 'GET',
    url: '/Pay/Build64/',
    dataType: 'json',
    complete: function(response) {
        ret = response.Message;            
    },
    async: false
});
alert(ret);    

My action:

public JsonResult Build64()
        {
            return Json(new
            {
                Message = "Test"
            });
        }

The Build64 is called. But ret is undefined. Where is a error?

Answer 1

Whenever you return JsonResult you have to specify JsonRequestBehavior.AllowGet otherwise it will give error, for demo see this blog link controller code.