AngularJs ng-options

1. select标签中的ng-model 使用时注意，选择的结果

<form class="form-horizontal container" ng-app="myApp" ng-controller="validateCtrl"
name="myForm" novalidate>
<div class="form-group">
<label class="control-label">地区：</label>
<!--如果不指定x.id, ng-model选择的结果是object对象-->
<select ng-model="areaID" ng-options="x.name for x in items"></select>
<span class="text-danger" ng-show="myForm.areaID.$dirty && myForm.areaID.$invalid">
<span ng-show="myForm.areaID.$error.required">地区是必须的</span>
</span>
</div>
</form>

var app = angular.module('myApp', []);
app.controller('validateCtrl', function ($scope, $timeout) {
$scope.items = [
{ id: 1, name: '山东' },
{ id: 2, name: '山西' }
];
$scope.areaID = 1;
$scope.$watch('areaID', function (newValue) {
console.info(newValue);
});
});

选择的结果是：object

<div class="form-group">
<label class="control-label">地区：</label>
<!-- x.id as x.name 用来指定选择结果为ID，显示的是name  -->
<select ng-model="areaID" ng-options="x.id as x.name for x in items"></select>
<span class="text-danger" ng-show="myForm.areaID.$dirty && myForm.areaID.$invalid">
<span ng-show="myForm.areaID.$error.required">地区是必须的</span>
</span>
</div>

选择的结果是ID



2.使用group by分组显示

<form class="form-horizontal container" ng-app="myApp" ng-controller="validateCtrl"
name="myForm" novalidate>
<div class="form-group">
<label class="control-label">动物：</label>
<!--使用group by 可以分组显示-->
<select ng-model="AniID" ng-options="x.id as x.name group by x.sex for x  in animals"></select>
</div>
</form>

var app = angular.module('myApp', []);
app.controller('validateCtrl', function ($scope, $timeout) {
$scope.animals = [
{
id: '00001',
name: '猫',
sex: '雌',
food: '鱼',
favor: '玩球'
},
{
id: '00002',
name: '狗',
sex: '雄',
food: '骨头',
favor: '接盘子'
},
{
id: '00003',
name: '兔',
sex: '雌',
food: '胡萝卜',
favor: '刨洞'
},
{
id: '00004',
name: '狮',
sex: '雄',
food: '肉',
favor: '猎物'
}
];
$scope.AniID = '00004';
$scope.$watch('AniID', function (newValue) {
console.info(newValue);
});
});

3.在Mvc中后台输出ng-options数据内容如下：

<select class="form-control" name="PageType" ng-model="entity.PageType"
ng-options='x.Key as x.Value for x in @Html.Raw(Enums.GetList<Enums.PageType>().ToList().ToJson())'></select>运行结果如下：
注意，此处内容外部使用单引号包裹，也就是ng-options='xxx'



更多：

AngularJs select绑定数字类型问题 

AngularJS阻止事件冒泡$event.stopPropagation() 

AngularJs checkbox绑定

AngularJS动画（一）