Model Binding is Failing when I pass JSON via $.get()

Question

This question is related to the this.

I'm using the following to extract the attributes & values from the select elements on my page:

var valuesArray = $("select").map(function()
{
    return $.getAttributes($(this).find(":selected"));
});

var arr = new Array();
$.each(valuesArray, function()
{
    arr.push($(this)[0]); // this filters out things like 'length'
});

basically, after I get an array of the objects representing the attributes of my select boxes, I want to convert that to a data string that I can pass to the server

// get data string for server
var data = $.toJSON(arr); 

The JSON returned is:

[{"siteId":"2"},{"filterId":"2","factSheetPanelId":"2"}]

and I pass it to the server like so:

$.get(url, data, function(result)
{
    // do stuff
}, "html");

The code on the server is but it's not picking up the values & Model Binding is failing

public PartialViewResult PanelList(FactsheetPanel panel, Site site)
{
    // panel.FactsheetPanelId == 0. I would expect it to be 2
    // same for site.SiteId..
}

Can anyone see anyting obviously wrong with this?

Answer 1

Don't pass JSON. jQuery will simply pass that to the server, which won't know what to do with it unless you write a JSON data binder.

Instead, pass a JavaScript object. jQuery will serialize that into query string parameters, which work correctly. E.g.:

var data = {
               panel: { filterId: "2", factSheetPanelId: "2" },
               site: { siteId: "2" }
           };

Answer 2

That looks wrong. It would have helped if you also posted your FactsheetPanel and Site classes but anyway, as far as I understand, here's how your JSON should be after getting the values from your HTML elements and processing them.

{"site.siteId":"2", "panel.filterId":"2","panel.factSheetPanelId":"2"}