首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 Javascript

AngularJS使用ngOption实现下拉列表的实例代码

Posted in Javascript onJanuary 23, 2016

下拉列表的简单使用

ng-option指令使用很简单，只需要绑定两个属性：

一个是ng-model用于获取选定的值；

另一个是ng-options用于确定下拉列表的元素数组。

<select ng-model="engineer.currentActivity" class="form-control" ng-options="act for act in activities"></select>

上面这条语句就是把选择的值与engineer.currentActivity进行双向数据绑定，然后列表中的选项是activities中的每一个值。数据如下：

$scope.engineer = {
name: "Dani",
currentActivity: "Fixing bugs"
};
$scope.activities =
[
"Writing code",
"Testing code",
"Fixing bugs",
"Dancing"
];

运行结果如：

AngularJS使用ngOption实现下拉列表的实例代码

为了美观一点，这里引用了bootstrap。

<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
<link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> 
<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div ng-controller="EngineeringController" class="container">
<div class="col-md-12">
{{engineer.name}} is currently: {{ engineer.currentActivity}}
</div>
<div class="col-md-4">
<label for="name">Choose a new activity:</label>
<select ng-model="engineer.currentActivity" class="form-control"
ng-options="act for act in activities"> 
</select>
</div>
</div>
<script type="text/javascript">
var myAppModule = angular.module("myApp",[]);
myAppModule.controller("EngineeringController",["$scope",function($scope){
$scope.engineer = {
name: "Dani",
currentActivity: "Fixing bugs"
};
$scope.activities =
[
"Writing code",
"Testing code",
"Fixing bugs",
"Dancing"
];
}]);
</script>
</body>
</html>

复杂对象，自定义列表名称

有的时候下拉列表并不是单纯的字符串数组，可能是json对象，例如：

$scope.activities =
[
{ id: 1, type: "Work" , name: "Writing code" },
{ id: 2, type: "Work" , name: "Testing code" },
{ id: 3, type: "Work" , name: "Fixing bugs" },
{ id: 4, type: "Play" , name: "Dancing" }
];

这个时候，绑定的数据就必须是与这里面的格式相同的数据，比如直接复制其中一条：

$scope.engineer = {
name: "Dani" ,
currentActivity: {
id: 3,
type: "Work" ,
name: "Fixing bugs"
}
};

当然也可以直接指定成：

$scope.engineer = {currentActivity:activities[3]}

然后在指令中可以循环列表拼接处下拉框的名称

<select 
ng-model = "engineer.currentActivity"
class="form-control"
ng-options = "a.name +' (' + a.type + ')' for a in activities" > 
</select >

运行效果如：

AngularJS使用ngOption实现下拉列表的实例代码

全部的代码如下：

<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
<link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> 
<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div ng-controller="EngineeringController" class="container">
<div class="col-md-12">
{{engineer.name}} is currently: {{ engineer.currentActivity}}
</div>
<div class="col-md-4">
<label for="name">Choose a new activity:</label> 
<select 
ng-model = "engineer.currentActivity"
class="form-control"
ng-options = "a.name +' (' + a.type + ')' for a in activities" > 
</select > 
</div>
</div>
<script type="text/javascript">
var myAppModule = angular.module("myApp",[]);
myAppModule.controller("EngineeringController",["$scope",function($scope){
$scope.engineer = {
name: "Dani" ,
currentActivity: {
id: 3,
type: "Work" ,
name: "Fixing bugs"
}
};
$scope.activities =
[
{ id: 1, type: "Work" , name: "Writing code" },
{ id: 2, type: "Work" , name: "Testing code" },
{ id: 3, type: "Work" , name: "Fixing bugs" },
{ id: 4, type: "Play" , name: "Dancing" }
];
}]);
</script>
</body>
</html>

实现下拉列表的分组

其实分组与前面的例子很像，只要把空间中的ng-options的值换成下面：

<select ng-model = "engineer.currentActivity"
class="form-control"
ng-options = "a.name group by a.type for a in activities" > 
</select >

添加 group by 就会按照后面的值进行分组

AngularJS使用ngOption实现下拉列表的实例代码

全部代码：

<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
<link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> 
<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div ng-controller="EngineeringController" class="container">
<div class="col-md-12">
{{engineer.name}} is currently: {{ engineer.currentActivity}}
</div>
<div class="col-md-4">
<label for="name">Choose a new activity:</label> 
<!-- <select 
ng-model = "engineer.currentActivity"
class="form-control"
ng-options = "a.name +' (' + a.type + ')' for a in activities" > 
</select > -->
<select ng-model = "engineer.currentActivity"
class="form-control"
ng-options = "a.name group by a.type for a in activities" > 
</select > 
</div>
</div>
<script type="text/javascript">
var myAppModule = angular.module("myApp",[]);
myAppModule.controller("EngineeringController",["$scope",function($scope){
$scope.engineer = {
name: "Dani" ,
currentActivity: {
id: 3,
type: "Work" ,
name: "Fixing bugs"
}
};
$scope.activities =
[
{ id: 1, type: "Work" , name: "Writing code" },
{ id: 2, type: "Work" , name: "Testing code" },
{ id: 3, type: "Work" , name: "Fixing bugs" },
{ id: 4, type: "Play" , name: "Dancing" }
];
}]);
</script>
</body>
</html>

按照id进行标识

由于之前的ng-model相当于初始的时候给设定了一个值。当你选择一个下拉列表选项的时候，就会覆盖掉这个初始值。

所以更多的时候会使用一个id进行标识，这样在初始化赋值的时候，只需要设定一个id就可以了。

$scope.engineer = {
currentActivityId: 3
};
$scope.activities =
[
{ id: 1, type: "Work" , name: "Writing code" },
{ id: 2, type: "Work" , name: "Testing code" },
{ id: 3, type: "Work" , name: "Fixing bugs" },
{ id: 4, type: "Play" , name: "Dancing" }
];

指令可以写成下面的格式

<select 
ng-model = "engineer.currentActivityId"
class="form-control"
ng-options = "a.id as a.name group by a.type for a in activities" > 
</select >

通过 as 前面的值，就可以确定唯一的一个选项

AngularJS使用ngOption实现下拉列表的实例代码

全部代码如下：

<html ng-app="myApp">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
<link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> 
<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div ng-controller="EngineeringController" class="container">
<div class="col-md-12">
current is: {{ engineer.currentActivityId}}
</div>
<div class="col-md-4">
<label for="name">Choose a new activity:</label> 
<select 
ng-model = "engineer.currentActivityId"
class="form-control"
ng-options = "a.id as a.name group by a.type for a in activities" > 
</select > 
</div>
</div>
<script type="text/javascript">
var myAppModule = angular.module("myApp",[]);
myAppModule.controller("EngineeringController",["$scope",function($scope){
$scope.engineer = {
currentActivityId: 3
};
$scope.activities =
[
{ id: 1, type: "Work" , name: "Writing code" },
{ id: 2, type: "Work" , name: "Testing code" },
{ id: 3, type: "Work" , name: "Fixing bugs" },
{ id: 4, type: "Play" , name: "Dancing" }
];
}]);
</script>
</body>
</html>

以上所述是小编给大家分享的AngularJS使用ngOption实现下拉列表的实例代码，希望对大家有所帮助。

AngularJS使用ngOption实现下拉列表的实例代码

- Author -

盗梦者

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐
jquery HotKeys轻松搞定键盘事件代码
Aug 30 Javascript
jQuery dialog 异步调用ashx,webservice数据的代码
Aug 03 Javascript
JS图片浏览组件PhotoLook的公开属性方法介绍和进阶实例代码
Nov 09 Javascript
基于json的jquery地区联动效果代码
Jul 06 Javascript
跟我学习javascript的最新标准ES6
Nov 20 Javascript
JavaScript实现仿淘宝商品购买数量的增减效果
Jan 22 Javascript
纯js代码制作的网页时钟特效【附实例】
Mar 30 Javascript
AngularJS验证信息框架的封装插件用法【w5cValidator扩展插件】
Nov 03 Javascript
关于angular js_$watch监控属性和对象详解
Apr 24 Javascript
微信小程序表单验证功能完整实例
Dec 01 Javascript
解决layer.msg 不居中 ifram中的问题
Sep 05 Javascript
js实现带搜索功能的下拉框
Jan 11 Javascript
JavaScript实现ASC转汉字及汉字转ASC的方法
Jan 23 #Javascript
javascript实现全角转半角的方法
Jan 23 #Javascript
jQuery操作Table技巧大汇总
Jan 23 #Javascript
jquery采用oop模式class类的使用示例
Jan 22 #Javascript
jquery日历插件datepicker用法分析
Jan 22 #Javascript
js简单设置与使用cookie的方法
Jan 22 #Javascript
prototype框架中美元符号$用法分析
Jan 22 #Javascript
进销存(1) list(1) Coroutine(1) find(1) pytest(3) zip(1) enumerate(1) csv(4) gevent(1) greenlet(1)
You might like
Linux下安装PHP MSSQL扩展教程
2014/10/24 PHP
详解thinkphp5+swoole实现异步邮件群发（SMTP方式）
2017/10/13 PHP
ie和firefox中img对象区别的困惑
2006/12/27 Javascript
Javascript 汉字字节判断
2009/08/01 Javascript
jQuery+CSS 实现的超Sexy下拉菜单
2010/01/17 Javascript
模拟多级复选框效果的jquery代码
2013/08/13 Javascript
js 实现菜单上下显示附效果图
2013/11/21 Javascript
Java/JS获取flash高宽的具体方法
2013/12/27 Javascript
JS实现点击链接取消跳转效果的方法
2014/01/24 Javascript
js实现文本框只允许输入数字并限制数字大小的方法
2015/08/19 Javascript
Bootstrap每天必学之表单
2015/11/23 Javascript
使用JavaScript实现ajax的实例代码
2016/05/11 Javascript
WEB前端开发框架Bootstrap3 VS Foundation5
2016/05/16 Javascript
全面理解闭包机制
2016/07/11 Javascript
全面了解构造函数继承关键apply call
2016/07/26 Javascript
JS获取浮动(float)元素的style.left值为空的快速解决办法
2017/02/19 Javascript
Angular4如何自定义首屏的加载动画详解
2017/07/26 Javascript
React如何避免重渲染
2018/04/10 Javascript
vue自定义键盘信息、监听数据变化的方法示例【基于vm.$watch】
2019/03/16 Javascript
优化Vue项目编译文件大小的方法步骤
2019/05/27 Javascript
Flutter部件内部状态管理小结之实现Vue的v-model功能
2019/06/11 Javascript
前端深入理解Typescript泛型概念
2020/03/09 Javascript
JavaScript arguments.callee作用及替换方案详解
2020/09/02 Javascript
python获取android设备的GPS信息脚本分享
2015/03/06 Python
python list元素为tuple时的排序方法
2018/04/18 Python
在python win系统下 打开TXT文件的实例
2018/04/29 Python
python匿名函数的使用方法解析
2019/10/10 Python
pygame实现俄罗斯方块游戏（基础篇3）
2019/10/29 Python
OpenCV python sklearn随机超参数搜索的实现
2020/01/17 Python
Django微信小程序后台开发教程的实现
2020/06/03 Python
Matplotlib 折线图plot()所有用法详解
2020/07/28 Python
Michael Kors澳大利亚官网：世界知名的奢侈饰品和成衣设计师
2020/02/13 全球购物
中专生的个人自我评价
2013/12/11 职场文书
2015年公司国庆放假通知
2015/07/30 职场文书
2016高中社会实践心得体会范文
2016/01/14 职场文书
mybatis中sql语句CDATA标签的用法说明
2021/06/30 Java/Android