How to Serialize Model in View and Pass to Controller Action - json

Question

I have a very specific need to serialize a model in the view and then pass it to a controller action at some point. I can get it to work by doing several hacks but its not pretty.
My test controller action
public ActionResult Index()
{
DefaultOptionValueRound defaultOptionValueRound = new DefaultOptionValueRound()
{
OptionId = 1835,
OptionValueId = 40343
};
TestModel testModel = new TestModel()
{
DefaultOptionValueRound = defaultOptionValueRound
};
return View(testModel);
}
The View
#using Common.Repository.Extensions
#model EngA.SandboxApplication.Controllers.TestModel
#Html.Hidden("DefaultOptionValueRound", Html.Raw(Json.Encode(Model.DefaultOptionValueRound)))
<input type="button" value="submit" onclick="SerializeModelTest.processOptionMag()"/>
<script language="javascript">
SerializeModelTest = {
processOptionMag: function () {
//Testing: This Works
//var defaultOptionValueRound = { OptionId: 1834, OptionValueId: 4034377 }
//var data = JSON.stringify({ defaultOptionValueRound: defaultOptionValueRound });
//This Does Not Work
var defaultOptionValueRound = $("#DefaultOptionValueRound").val();
var data = { defaultOptionValueRound: defaultOptionValueRound }; //Stringify Does not work either
$.ajax({
contentType: 'application/json; charset=utf-8',
type: "Post",
cache: false,
url: '#Url.Action("ProcessOptionMag", "SerializeModelTest")',
data: data,
dataType: "json",
traditional: true,
success: function(data) {
alert(data);
}
});
}
}
</script>
The problem is that the serialized model is returned in a stringify form already.
There must be an elegant way of doing this without me have to do JS string manipulation to make it work.
Thank you for your help

Answer 1

I found out that I can un-stringify my result using JSON.Parse and then repackage it with other parameters for sending to the controller.
var defaultOptionValueRound = $("#DefaultOptionValueRound").val();
var data = JSON.stringify({ defaultOptionValueRound: JSON.parse(defaultOptionValueRound) });
Now everything works.