AngularJS之ng-options指令

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 效果 http://sandbox.runjs.cn/show/nhi8ubrb

    <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‘
        }];
    }]);

效果：http://runjs.cn/detail/nhi8ubrb