Kendo-UI数据绑定到功能不起作用

Question

我使用Kendo UI MVVM - Fiddle跟随工作代码

这里复选框的模板中有一个绑定

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

它isChecked与模型的属性绑定.

现在,我需要在用户通过提醒已选中/未选中状态和用户名单击复选框时显示警告.

我尝试使用data-bind ="checked:showAlert()"但是没有用.

我们怎样才能做到这一点？

身体

<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>

使用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);
});

参考

1. 如何仅显示结果表中的选定记录
2. MVVM /自定义绑定
3. MVVM /事件绑定
4. Kendo MVVM概述
5. 价值绑定

Answer 1

您可以对更改事件进行数据绑定:

HTML:

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

查看型号:

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到observable(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);

(演示)