How to use AJAX with MVC

function BindDropdown() {
        $.ajax({
            url: "/apiFolder/ApiName",
            type: "Get",
            dataType: 'json',
            success: function (datas, status, xhr) {
                var vItems = "<option value='0'> ..Select.. </option>";
                $("#ddlRDName").empty();
                $.each(datas, function (index, rd) {
                    vItems += "<option value='" + rd.RoD_ID + "'> " + rd.RoD_Name + " </option>";
                });
                $("#ddlRDName").html(vItems);
                $("#ddlRDName").val("0");
            },
            error: function (xhr, textStatus, errorThrown) {
                //$('#dialog-overlay').hide();
            }
        });
    }