javascript - Kendo-UI 数据绑定(bind)功能不起作用

Question

我有以下使用 Kendo UI MVVM 的工作代码 - Fiddle

这里有一个复选框的模板绑定(bind)

<input type="checkbox" name="selection" data-bind="checked: isChecked"/>

它绑定(bind)到模型的 isChecked 属性。

现在我需要通过提醒选中/未选中状态和用户名来在用户单击复选框时显示提醒。

我尝试使用 data-bind="checked: showAlert()"但没有成功。

我们怎样才能做到这一点？

body

<script id="selection-table-template" type="text/x-kendo-template">
    <tr>
        <td data-bind="text: name"></td>
        <td data-bind="text: age"></td>
        <td>
            <input type="checkbox" name="selection" data-bind="checked: isChecked"/>
        </td>
    </tr>
</script>

<script id="row-template" type="text/x-kendo-template">
    <tr data-bind="visible: isChecked">
        <td data-bind="text: name"></td>
        <td data-bind="text: age"></td>
    </tr>
</script>

<table id="selectionTable">
    <thead>
        <tr>
            <th>Name</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody data-template="selection-table-template" data-bind="source: employees"/>
</table>

<br />
<hr />

<table id="resultTable">
    <thead>
        <tr>
            <th>Name</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody data-template="row-template" data-bind="source: employees"/>
</table>

Javascript

var viewModel = kendo.observable({
    employees: [
        { name: "Lijo", age: "28", isChecked: true },
        { name: "Binu", age: "33", isChecked: true },
        { name: "Kiran", age: "29", isChecked: true }
    ] 
});


$(document).ready(function () {
    kendo.bind($("body"), viewModel);
});

引用文献

1. How to display only selected records in the result table
2. MVVM / Custom binding
3. MVVM / Event binding
4. Kendo MVVM Overview
5. Value binding

Answer 1

您可以对更改事件进行数据绑定(bind):

HTML:

<input type="checkbox" name="selection" 
data-bind="checked: isChecked, events: { change: printIsChecked }"/>

查看模型:

var viewModel = kendo.observable({
    employees: [{
        name: "Lijo",
        age: "28",
        isChecked: true
    }, {
        name: "Binu",
        age: "33",
        isChecked: true
    }, {
        name: "Kiran",
        age: "29",
        isChecked: true
    }],
    printIsChecked: function(e) {
        $("#out2").html("via event-binding on input: " + e.data.name + " is checked: " + e.data.isChecked);
    }
});

或将更改事件处理程序绑定(bind)到可观察对象(不更改您的 Html):

var viewModel = kendo.observable({
    employees: [{
        name: "Lijo",
        age: "28",
        isChecked: true
    }, {
        name: "Binu",
        age: "33",
        isChecked: true
    }, {
        name: "Kiran",
        age: "29",
        isChecked: true
    }],
    printIsChecked: function (e) {
        var changedItem = e.items[0];

        // note: might need to check e.field === "isChecked" 
        // if other fields might change or if you add/remove items from employees
        $("#out").html("via Observable.change: " + changedItem.name + " is checked: " + changedItem.isChecked);
    }
});  
viewModel.employees.bind("change", viewModel.printIsChecked);

( demo )