如何从值的Angular下拉列表中获取ID？

Question

As you can see in the code, I have a list cars Car A,B, and C with corresponding ids in availableCars list. 正如您在代码中看到的那样，我在availableCars列表中有一个列出了汽车A，B和C以及相应的ID。 I'm getting already chosen car from a service. 我已经从服务中选择了汽车。 It is not an object just the car name. 它不仅是汽车名称，而且不是对象。 User has option to choose different car but on change, I have to send car id to other service. 用户可以选择其他汽车，但是在更改时，我必须将汽车ID发送给其他服务。 Is there any simplest way to achieve my goal? 有没有最简单的方法可以实现我的目标？

 (function(angular) { 'use strict'; angular.module('ngrepeatSelect', []) .controller('ExampleController', ['$scope', function($scope) { $scope.carName = (function getCarNameFromService(){ return 'Car B'; })(); $scope.availableCars = [ {id: '1A', name: 'Car A'}, {id: '2B', name: 'Car B'}, {id: '3C', name: 'Car C'} ] }]); })(window.angular);

 <html lang="en"> <head> <meta charset="UTF-8"> <title>Example - example-ngrepeat-select-production</title> <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script> <script src="app.js"></script> </head> <body ng-app="ngrepeatSelect"> <div ng-controller="ExampleController"> <form name="myForm"> <label for="repeatSelect"> Repeat select: </label> <select name="repeatSelect" id="repeatSelect" ng-model="carName"> <option ng-repeat="option in availableCars" value="{{option.name}}">{{option.name}}</option> </select> </form> <hr> <tt>selected car name = {{carName}}</tt><br/> <tt>selected car id = ???</tt><br/> </div> </body> </html>

Answer 1

Rather than using an ng-repeat on the "option" element inside of a select, you can use "ng-options". 您可以使用“ ng-options”，而不是在select内的“ option”元素上使用ng-repeat。 ng-options ng-options

I created a plnkr to illustrate your example. 我创建了一个plnkr来说明您的示例。 Some of the key pieces of code are as follows: 一些关键代码如下：

JS JS

  var carName = "Car B"; //name provided to this controller 

    $scope.availableCars =  [
       {id: '1A', name: 'Car A'},
       {id: '2B', name: 'Car B'},
       {id: '3C', name: 'Car C'}
     ]

     $scope.selectedCar = $scope.availableCars.filter(function(car){
         return car.name === carName;
     })[0];

    $scope.selectedId = $scope.selectedCar.id;

     $scope.updateCar = function(id){
         $scope.selectedId = id;
     }

and 和

HTML 的HTML

<form name="myForm">
    <label for="repeatSelect"> Repeat select: </label>
    <select ng-options="car as car.name for car in availableCars" ng-model="selectedCar" ng-change="updateCar(selectedCar.id)"></select>
  </form>

Notice the "ng-change" and the "ng-options" in the html. 注意html中的“ ng-change”和“ ng-options”。

Answer 2

User has option to choose different car but on change, I have to send car id to other service 用户可以选择其他汽车，但是在更改时，我必须将汽车ID发送给其他服务

You could use ng-change for that: 您可以为此使用ng-change ：

<select ng-change="sendInfo(...)" ...>
...
</select>

Actually, I would advise to bind to the model the car id instead of the car name. 实际上，我建议将汽车ID（而不是汽车名称）绑定到模型。 Or a car object, providing you switch to ng-options . 或汽车对象，请您切换到ng-options 。 That way you could send the selected id. 这样，您可以发送选定的ID。

如何从值的Angular下拉列表中获取ID？

问题描述

2 个解决方案

解决方案1
1 2016-05-11 00:01:52

解决方案2
0 2016-05-11 00:11:12

如何从值的Angular下拉列表中获取ID？

问题描述

2 个解决方案

解决方案1 1 2016-05-11 00:01:52

解决方案2 0 2016-05-11 00:11:12

解决方案1
1 2016-05-11 00:01:52

解决方案2
0 2016-05-11 00:11:12