get contents of div and post to db from ajax Actionlink mvc4

get contents of div and post to db from ajax Actionlink mvc4

This code retrieves clicked items and updates a div on a page that has a
submit button in it. How do I get the contents of that div, post to db and
return to previous page?
I know it's a lot but I can't get a grip on posting with Ajax.
$(".ITA").on("click", "li", function () {
var div = $("#AddedItems");
var parent = $(this).closest("ul");
var itemtoadd = parent.find("[data-id]").attr("data-id");
var name = parent.find("[data-name]").attr("data-name");
alert(itemtoadd + name);
//how to get these and post to db?
var itemtoadd = ("<li class = " + itemtoadd + ">" + name + "</li>");
alert(itemtoadd); //for debug
$(itemtoadd).appendTo(div);
});
I didn't get far with the link
@Ajax.ActionLink(
"Submit", "PostToDb",
new AjaxOptions {
HttpMethod = "POST",
//what to do with data:?
})