Question

更新的代码：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js" type="text/javascript"></script>
<script src="http://github.com/downloads/SteveSanderson/knockout/knockout-2.2.0.js" type="text/javascript"></script>

</head>

<body>

<form id="new-pub">

    <input data-bind="value: Title" /><br/>

    <select size="10" multiple="multiple"
            data-bind="selectedOptions: Attachment, options: AttachmentSelect"></select>


</form>


<script type="text/javascript">

var AttachmentSelect=["C2012_info_mail.pdf", "C2012_programme.pdf"];

 var viewModel =
 {
    Title : ko.observable('Hello world'),
    Attachment: ko.observableArray([ "C2012_info_mail.pdf" ,  "C2012_programme.pdf" ])
};

 ko.applyBindings(viewModel, document.getElementById("new-pub"));

</script>

</body>
</html>

预计会突出显示（{1}}个selected个项目，但没有任何反应。为什么呢？

Answer 1

您必须为您的选择添加value绑定：

<select data-bind="options: myList, value: selected" multiple="multiple" size="5">

viewModel也是一个函数，因此你必须创建它的实例：

ko.applyBindings(new viewModel());

这是工作小提琴：http://jsfiddle.net/wM3EX/4/

修改：

更改options和selectedOptions出价的顺序。选项应始终是第一个：

<select size="10" multiple="true" data-bind="options: AttachmentSelect, selectedOptions: Attachment"> </select>

工作小提琴：http://jsfiddle.net/S96pA/2/

Knockoutjs multiselect没有更新

1 个答案: