MVC: How to serialize a knockout object into a JSON property through AJAX

Question

I'm trying to serialize a knockout object and pass it into a JSON property called multipleCharge.

This is the ajax code to send data though Get method to a mvc controller

        $.ajax({
            url: _url,
            type: 'GET',
            //data: { multipleCharge: ko.mapping.toJS(_vm)},
            data: { multipleCharge : { AccountId : 2 } },
            dataType: 'json'});

And this is the method

[HttpGet]
public HttpResponseMessage GetSalesInvoiceMultipleCharge
    ([FromUri]MultipleChargeDto multipleCharge)
{
    ...
}

Please, note that the ajax method has a comment line. Using the hardcoded line, it works, multipleCharge object is not null, but if I uncomment the another line, it's a bad request in my browser.

Look at this.

enter image description here

Any idea about what's happening. Using the Chrome console, it looks ok; so I can't identify the error.

so, does URLs have limit lenght? – Darf Zon Feb 16 '14 at 22:10 — Darf Zon, Feb 16 '14 at 22:10

score 0 · Answer 1 · edited May 23 '17 at 10:25

It is may be IIS problems with very long URL.
See this Issue with URL length in IIS7 (Windows Server 2008) question and related answers.
Also see this http://www.iis.net/configreference/system.webserver/security/requestfiltering documentation.
You could try to solve this problem by editing web.config. But also you could use POST method instead of GET and send your data in request body.

MVC: How to serialize a knockout object into a JSON property through AJAX

1 Answers1