通过Json / Ajax将对象和对象行传递给MVC控制器始终返回空值

Question

Please see the attached image我无法弄清楚为什么传递给控制器​​的对象的所有值总是显示为null。我在这里错过了什么？在此先感谢!!

控制器

{
  "query": {
    "has_child": {
      "type": "sometype",
      "score_mode": "sum",
      "query": {
        "bool": {
          "must": [
            {
              "term": {
                "somefield": "somevalue"
              }
            },
            {
              "function_score": {
                "script_score": {
                  "script": "1"
                }
              }
            }
          ]
        }
      },
      "inner_hits": {}
    }
  }
}

查看

[HttpPost]
public JsonResult SaveOrder(Order order, List<Item> items)
{ 
    //do something here;
    return Json("OK");
}

类

<script type="text/javascript" 
     src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>

<script type="text/javascript">
    $(document).ready(function () {
        $("#btnsave").on('click', function () {
            var url = '@Url.Action("SaveOrder", "Employee")';
            var data1 = { CustomerName: 'MS' };
            var data2 = [{ ItemName: "Laptop", Quantity: 5 },
                         { ItemName: "Desktop", Quantity : 25}];

            $.ajax({
                url: url,
                type: "POST",
                data: { order:data1, items: data2 },
                datatype: "json",
                ContentType: "application/json",
                cache: false,
                success: function (resp) {
                    alert('Success' + resp);
                },
                error: function (resp) {
                    alert("Something Went Wrong" + resp);
                }
            })
        })
    })
</script>

Result