asp.net-mvc-3 – KnockoutJs Observable Arrays和Dropdownlists

我有一个viewmodel,从Mvc3控制器填充,绑定到一个下拉列表,这是正常的.

我有额外的数据存储在“platforms”observableArray中,和
我希望这些数据显示在文本框中,取决于
下拉列表中的选定值.

到目前为止,这是我的代码： –

<script type="text/javascript">
    $(document).ready(function () {
        var sampleSubmission = function () {
            this.selectedPlatform = ko.observable();
            this.platforms = ko.observableArray();

            this.showSearch = ko.observable(false);
            this.craftText = ko.observable();
            this.showSerialNumber = ko.observable(0);

            this.selectedPlatform.subscribe(function (platformId) {





            } .bind(this));
        };

        var sampleSubmissionViewModel = new sampleSubmission();
        ko.applyBindings(sampleSubmissionViewModel);

        //Load the platforms
        $.ajax({
            url: '@Url.Action("GetPlatforms","Home")',type: 'GET',success: function (data) {
                sampleSubmissionViewModel.platforms(data);
            }
        });
    });  

</script>

有谁有任何想法我是如何实现这一目标的？

提前致谢.