如何获得id时选择在剑道ui自动完成在knockout js

Question

我在我的应用程序中使用敲出剑道自动完成。我想获得所选自动完成的值字段。下面是自动完成的小提琴。我想显示id，而不是文本。

小提琴

Javascript代码:

var ViewModel = function() {
    this.choices = ko.observableArray([
        { id: "1", name: "apple"},
        { id: "2", name: "orange"},
        { id: "3", name: "banana"}
    ]);
    this.selectedChoice = ko.observable();   
};
ko.applyBindings(new ViewModel());

HTML:

<input data-bind="kendoAutoComplete: { dataTextField: 'name', 
                                       dataValueField:'id', 
                                       data: choices,
                                       value: selectedChoice }" />
 Selected: <strong data-bind="text: selectedChoice"> </strong>

Answer 1

您可以使用select函数(并删除该值):

<input data-bind="kendoAutoComplete: { dataTextField: 'name', 
                                       dataValueField:'id', 
                                       data: choices,
                                       select: function(e) { 
    $data.selectedChoice(this.dataItem(e.item.index()).id);
}}" />

演示

Answer 2

另一种方法是使用ko.computed获取所选数据的id。

HTML:

<input data-bind="kendoAutoComplete: { dataTextField: 'name', 
                                       dataValueField: 'id', 
                                       data: choices,
                                       value: selectedChoice }" />
Selected: <strong data-bind="text: selectedChoiceId"> </strong>

JS:

var ViewModel = function() {
    this.choices = ko.observableArray([
        { id: "1", name: "apple"},
        { id: "2", name: "orange"},
        { id: "3", name: "banana"}
    ]);
    this.selectedChoice = ko.observable('');
    this.selectedChoiceId = ko.computed(function () {
        var choices = this.choices();
        for (var i in choices) {
            if (choices[i].name == this.selectedChoice())
                return choices[i].id;
        }
        return "";
    }, this);
};
ko.applyBindings(new ViewModel());

小提琴:http://jsfiddle.net/novalagung/vp41vc69/