使用 Knockoutjs 绑定对象列表

我正在尝试使用KnockoutJS和Knockout Mapping将数据绑定到Webforms应用程序 ASP.NET

.HTML

<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script src="Scripts/knockout-2.3.0.js" type="text/javascript"></script>
<script src="Scripts/knockout.mapping-latest.js" type="text/javascript"></script>
<script type="text/javascript">
    function bindModel(data) {
        var viewModel;
        viewModel = ko.mapping.fromJS(data);
        console.log(viewModel);
        ko.applyBindings(viewModel);
    }
    $(document).ready(function () {
        $.ajax({
            url: "TestPage.aspx/GetItems",
            data: {},
            type: "POST",
            contentType: "application/json",
            dataType: "JSON",
            timeout: 10000,
            success: function (result) {
                bindModel(result);
            },
            error: function (xhr, status) {
                alert(status + " - " + xhr.responseText);
            }
        });
    });
</script>
...
<table>
    <thead>
        <tr>
            <th>
                Id
            </th>
            <th>
                Name
            </th>
        </tr>
    </thead>
    <tbody data-bind="foreach: Item">
        <tr>
            <td data-bind="text: Id">
            </td>
            <td data-bind="text: Name">
            </td>
        </tr>
    </tbody>
</table>

C#

[WebMethod]
public static List<Item> GetItems()
{
    List<Item> itemlist = new List<Item>
        {
            new Item {Id = 1, Name = "Item1", Description = "Item 1 Description"},
            new Item {Id = 2, Name = "Item2", Description = "Item 2 Description"}
        };
    return itemlist;
}
public class Item
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
}

杰伦响应

{"d":[{"__type":"KnockoutWebFormsTest.Item","Id":1,"Name":"Item1","Description":"Item 1 Description"},{"__type":"KnockoutWebFormsTest.Item","Id":2,"Name":"Item2","Description":"Item 2 Description"}]}

但这给出了一个错误，

Uncaught ReferenceError: Unable to parse bindings.
Bindings value: foreach: Item
Message: Item is not defined

我在这里做错了什么，如何解决这个问题？

---

编辑：

如果我直接用数据调用bindModel，例如

bindModel({ "d": [{ "__type": "KnockoutWebFormsTest.Item", "Id": 21, "Name": "Item1", "Description": "Item 1 Description" }, { "__type": "KnockoutWebFormsTest.Item", "Id": 2, "Name": "Item2", "Description": "Item 2 Description"}] });

并将data-bind="foreach: Item"更改为data-bind="foreach: d"(如 david.s 建议的那样(

它工作正常...但是如果我将 JSON 结果直接传递给绑定模型，它会给出错误

d is not defined

知道如何解决这个问题吗？