我正在尝试使用KnockoutJS和Knockout Mapping
将数据绑定到ASP.NET Webforms应用程序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; }
}
JSON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"}]}
但这会产生错误,
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?
如果我直接使用数据调用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"
(由david.s建议)
它工作正常......但是如果我将JSON结果直接传递给bindModel,则会给出错误
d is not defined
知道如何解决这个问题吗?
答案 0 :(得分:5)
从您的JSON响应{"d":[ ... ]}
我可以看到该数组被称为d
。所以你的绑定应该是foreach: d
。
答案 1 :(得分:0)
只是一个猜测,但你没有传递数组绑定。
您正在传递json对象。 {d:[{foo:bar},{foo:bar},]}
您可以更改此行bindModel(result);
到bindModel(result.d);
以访问“d”包含的数组。
我创建了一个JSBin .. http://jsbin.com/uxikew/2/edit
ajax调用已被删除,但你明白了。
答案 2 :(得分:-1)
感谢所有答案和帮助...
最后管理以使其正常工作,
将data-bind="foreach: Item"
更改为data-bind="foreach: d"
(由david.s提取)
和viewModel = ko.mapping.fromJS(data);
到viewModel = ko.mapping.fromJSON(data);