Question

我有一个DropDown。我在Option上使用ng-repeat绑定了它的值。我想仅使用值字段设置所选值。

这是我的代码。

<div ng-controller="myCtrl">
    <select ng-model="selectedItemvalue">
        <option value="">--Select --</option>
        <option ng-repeat="sel in selectables" value="{{sel.value}}">{{sel.label}}</option>
    </select>
    <p>Selected Value is : {{selectedItemvalue}}</p>
</div>

Js

angular.module('myApp', [])

// controller here
.controller('myCtrl', function($scope) {
    $scope.selectables = [
        { label: 'A', value: 1},
        { label:'B', value: 2},
        { label: 'C', value: 3}
    ];

    // this is the model that's used for the data binding in the select directive
    // the default selected item
    //using value, i want to set the selected value
    $scope.selectedItemvalue = "2"; 
})

My Fiddle

如您所见，我只想设置选定值uisng通过设置值。

Answer 1

您需要使用ng-model代替ng-value将其绑定到模型。

<select ng-model="selectedItemvalue">

更新： $scope.selectedItem需要在控制器中$scope.selectedItemvalue，然后您可以使用ng-selected来匹配条件

工作演示

angular
.module('myApp', [])

// controller here
.controller('myCtrl', function($scope) {
    $scope.selectables = [
        { label: 'A', value: 1},
        { label:'B', value: 2},
        { label: 'C', value: 3}
    ];

    // this is the model that's used for the data binding in the select directive
    // the default selected item
    //using value, i want to set the selected value
    $scope.selectedItemvalue = "2"; 
})

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.10/angular.min.js"></script>
<div ng-controller="myCtrl" ng-app="myApp">
    <select ng-model="selectedItemvalue">
        <option value="">--Select --</option>
        <option ng-repeat="sel in selectables" ng-selected="selectedItemvalue == sel.value" value="{{sel.value}}">{{sel.label}}</option>
    </select>
 <p>Selected Value is : {{selectedItemvalue}}</p>
</div>

Answer 2

您需要为option代码基本使用以下语法（使用ng-selected）：

<option ng-repeat="sel in selectables" value="{{sel.value}}" ng-selected="sel.value == selectedItemvalue">{{sel.label}}</option>

Answer 3

如果您尝试

$ scope.selectedItemvalue = {label：'B'，value：2};

然后它会起作用。

无法在angularJs中设置DropDown的选定值

3 个答案: