剔除选中/取消选中所有组合框

本文介绍了剔除选中/取消选中所有组合框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我使用敲除功能将JSON对象映射到用户控件，我有一个复选框列表， 它们看起来像

<input type="checkbox" data-bind="checked: IsEnabled1" />

我有JsonObject

var viewModel = { IsEnabled1 :ko.observable(true), IsEnabled2 :ko.observable(true), IsEnabled3 :ko.observable(false) }; ... ko.applyBindings(viewModel);

我想添加将被选中/取消选中所有其他复选框的全局复选框，我在JavaScript端进行了此更改，但是全局复选框更新了UI部分，但它们来自单独复选框的数据未映射到JSON对象. /p>

全局复选框

$("#GeneralTable thead tr th:first input:checkbox").click(function () { var checkedStatus = this.checked; $("#GeneralTable tbody tr td:first-child input:checkbox").each(function () { this.checked = checkedStatus; }); });

在此代码之后，我的JSON对象包含与UI不相关的数据.

如何从JS端更改复选框后更新所有JSON?

解决方案

请检查示例: jsfiddle/MenukaIshan/5gaLjh2c/

我认为这正是您所需要的.所有项目均具有IsChecked可观察的属性. ViewModel包含计算得出的可观察(可读和可写)形式，用于检查或取消选中所有项目.

I using knockout for mapping JSON obejct to user control, I have a list of single checkboxes, They look like

<input type="checkbox" data-bind="checked: IsEnabled1" />

I Have JsonObject

var viewModel = { IsEnabled1 :ko.observable(true), IsEnabled2 :ko.observable(true), IsEnabled3 :ko.observable(false) }; ... ko.applyBindings(viewModel);

And I want to add global check box that will be check/uncheck all other, I made this changes on JavaScript side but global check box update UI part but they data from separate check boxes doesn't mapping to JSON object .

Global checkbox

$("#GeneralTable thead tr th:first input:checkbox").click(function () { var checkedStatus = this.checked; $("#GeneralTable tbody tr td:first-child input:checkbox").each(function () { this.checked = checkedStatus; }); });

after this code my JSON object contain data that not related to UI.

How to update all JSON after change check boxes from JS side ?

解决方案

Please check the example: jsfiddle/MenukaIshan/5gaLjh2c/

I think it is exactly what you need. All items have IsChecked observable property. ViewModel contains computed observable (readable and writeable) to check or uncheck all items.