angularjs之ng-option

Posted 2020-10-03 莫小龙

angularjs之ng-option

ng-options一般有以下用法：

对于数组：

•  label for value in array
•  select as label for value in array
•  label group by group for value in array
•  label disable when disable for value in array
•  label group by group for value in array track by trackexpr
•  label disable when disable for value in array track by trackexpr
•  label for value in array | orderBy:orderexpr track by trackexpr(for including a filter with track by)
• 对于对象：

•  label for (key , value) in object
•  select as label for (key ,value) in object
•  label group by group for (key,value) in object
•  label disable when disable for (key, value) in object
•  select as label group by group for(key, value) in object
•  select as label disable when disable for (key, value) in object

1.基本下拉效果(lable for value in array)

　　其中select标签中的ng-model属性必须有，其值为选中的对象或属性值。

<div ng-controller="ngselect">
    <p>usage:label for value in array</p>
    <p>选项，{{selected}}</p>
    <select ng-model="selected" ng-options="o.id for o in optData">
        <option value="">-- 请选择 --</option>
    </select>
</div>
m1.controller("ngselect",[\'$scope\',function($sc){
    $sc.selected = \'\';
    $sc.optData = [{
        id: 10001,
        MainCategory: \'男\',
        ProductName: \'水洗T恤\',
        ProductColor: \'白\'
    },{
        id: 10002,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    },{
        id: 10003,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    }];
}]);

2.自定义下拉显示名称(label for value in array)

    label可以根据需要拼接出不同的字符串

<div ng-controller="ngselect2">
    <p>usage:label for value in array(label可以根据需求拼接出不同的字符串)</p>
    <p>选项，{{selected}}</p>
    <select ng-model="selected" ng-options="(o.ProductColor+\'-\'+o.ProductName) for o in optData">
        <option value="">-- 请选择 --</option>
    </select>
</div>
m1.controller("ngselect2",[\'$scope\',function($sc){
    $sc.selected = \'\';
    $sc.optData = [{
        id: 10001,
        MainCategory: \'男\',
        ProductName: \'水洗T恤\',
        ProductColor: \'白\'
    },{
        id: 10002,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    },{
        id: 10003,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    }];
}]);

3.ng-options 选项分组

    group by分组项

<div ng-controller="ngselect3">
    <p>usage:label group by groupName for value in array</p>
    <p>选项，{{selected}}</p>
    <select ng-model="selected" ng-options="(o.ProductColor+\'-\'+o.ProductName) group by o.MainCategory for o in optData">
        <option value="">-- 请选择 --</option>
    </select>
</div>
m1.controller("ngselect3",[\'$scope\',function($sc){
    $sc.selected = \'\';
    $sc.optData = [{
        id: 10001,
        MainCategory: \'男\',
        ProductName: \'水洗T恤\',
        ProductColor: \'白\'
    },{
        id: 10002,
        MainCategory: \'女\',
        ProductName: \'圓領长袖\',
        ProductColor: \'黃\'
    },{
        id: 10003,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    }];
}]);

4.ng-options 自定义ngModel的绑定

    下面selected的值为optData的id

<div ng-controller="ngselect4">
    <p>usage:select as label for value in array</p>
    <p>选项，{{selected}}</p>
    <select ng-model="selected" ng-options="o.id as o.ProductName for o in optData">
        <option value="">-- 请选择 --</option>
    </select>
</div>
m1.controller("ngselect4",[\'$scope\',function($sc){
    $sc.selected = \'\';
    $sc.optData = [{
        id: 10001,
        MainCategory: \'男\',
        ProductName: \'水洗T恤\',
        ProductColor: \'白\'
    },{
        id: 10002,
        MainCategory: \'女\',
        ProductName: \'圓領长袖\',
        ProductColor: \'黃\'
    },{
        id: 10003,
        MainCategory: \'女\',
        ProductName: \'圓領短袖\',
        ProductColor: \'黃\'
    }];
}]);

5.ng-options 多级下拉

<div ng-controller="ngselect5">
    <select ng-model="selectedPerson" ng-options="obj.name for obj in people"></select>
    <select ng-model="selectedGenre">
        <option ng-repeat="label in people[selectedPerson.id].interest">{{label}}</option>
    </select>
</div>
m1.controller("ngselect5",[\'$scope\',function($sc){
$sc.people = [
                    {
                            id: 0,
                            name: \'张三\',
                            interest: [
                            \'爬山\',
                            \'游泳\',
                            \'旅游\',
                            \'美食\'
                        ]
                    },
                    {
                        id: 1,
                        name: \'李四\',
                        interest: [
                            \'音乐\',
                            \'美食\',
                            \'Coffee\',
                            \'看书\'
                        ]
                    },
                    {
                        id: 2,
                        name: \'王五\',
                        interest: [
                            \'音乐\',
                            \'电影\',
                            \'中国好声音\',
                            \'爸爸去哪了\',
                            \'非常静距离\'
                        ]
                    },
                    {
                        id: 3,
                        name: \'小白\',
                        interest: [
                            \'游泳\',
                            \'游戏\',
                            \'宅家里\'
                        ]
                    }
                ];
}]);

 

原网址：http://www.cnblogs.com/zhx1991/p/4579886.html