如何从angularjs中的选择框中获取选定的值

Question

大家好>

我试图从按钮单击的选择框中获取选项值，但它在控制台中显示未定义.Options值来自服务器

这是我的HTML代码

<div class="form-group">
        <label class="control-form" for="cityid">Selct City</label>
        <select type="text" class="form-control" placeholder="City" id="acity" >
            <option value="">--Select City--</option>
            <option ng-repeat="city in cityinfo" ng-value="{{city.id}}"  ng-selected="{{city.id ==cityid}}">{{city.cityname}}</option>
</select>

<button class="btn btn-info prevnext pull-right" ng-click="nextpage()">Next <i class="fa fa-arrow-right"></i></button>

Controller.js文件代码

  $scope.nextpage = function(pageno) {
   console.log($scope.cityinfo);
   }

提前致谢

Answer 1

使用ng-options代替ng-repeat。

像这样：

<强>更新

<select type="text" class="form-control" placeholder="City" id="acity" ng-options="city.id as city.cityname for city in cityinfo track by city.id" ng-model="selectedCity">
    <option value="">--Select City--</option>
</select>
<button class="btn btn-info prevnext pull-right" ng-click="nextpage(selectedCity)">Next <i class="fa fa-arrow-right"></i></button>

JS：

$scope.nextpage = function(selectedCity){
    console.log(selectedCity);
}

Answer 2

以下是示例代码。

Html代码

 <select type="text" class="form-control" placeholder="City" id="acity" ng-options="city.id as city.cityname for city in cityinfo track by city.id" ng-model="currentCity">
    <option value="">--Select Cities--</option>
</select>
 <button class="btn btn-info prevnext pull-right" ng- 
  click="nextpage(currentCity)">Next <i class="fa fa-arrow-right"></i> 
  </button>

JS功能

$scope.nextpage = function(currentCity){
    console.log(currentCity);
}