无法在angularJs中设置下拉列表的选定值 [英] Unable to Set Selected Value Of DropDown In angularJs

问题描述

我有一个DropDown.我在Option上使用ng-repeat绑定它的值. 我只想使用value字段设置选定的值.

I have a DropDown. I'm binding it's value using ng-repeat on Option. I want to Set the selected value using the value field only .

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"; 
})

我的小提琴

如您所见，我只想通过设置Value来设置选定的值.

As you can see, I want to set selected value uisng only By setting Value.

推荐答案

您需要使用ng-model而不是ng-value来将其绑定到模型.

You need to use ng-model instead of ng-value to bind it to model.

<select ng-model="selectedItemvalue">

更新:$scope.selectedItem必须在控制器中为$scope.selectedItemvalue，然后您可以使用ng-selected匹配其条件

Update: $scope.selectedItem needs to be $scope.selectedItemvalue in controller and then you can use ng-selected to match condition on it

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>

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