Javascript 安格拉斯<；选择>；问题

我有个奇怪的问题。我在我的应用程序中使用AngularJS，我的标签有问题。我有一个控制员，由我的下属处理城市和州：

function MeuController($scope, $http) {  

$scope.states = [];  
$scope.selectedState = '';  

$scope.cities = [];  
$scope.selectedCity = '';  

$http.get('/state/GetStates').success(function(result) {  
    $scope.states = result;  
});  

$scope.getCities = function() {  
    $http.get('/cities/GetCitiesByState?state=' + $scope.selectedState).success(function(result) {  
        $scope.cities = result;  
    });  
}  
});  

在这一点上，一切都是好的，容易理解。但是

当我以这种方式创建元素时：

<select class="span2" name="SelectedState" ng-model="selectedState"   
ng-change="getCities()" ng-options="state.ID as state.Name for state in states">  
    <option></option>  
</select>  

<select class="span6" name="SelectedCity" ng-model="selectedCity"  
ng-options="city.ID as city.Name for city in cities">  
    <option></option>  
</select>  

<select class="span2" name="SelectedState" ng-model="selectedState"   
ng-change="getCities()">  
    <option ng-repeat="state in states" value="state.ID">{{state.Name}}</option>  
</select>  

<select class="span6" name="SelectedCity" ng-model="selectedCity">  
    <option ng-repeat="city in cities" value="city.ID">{{city.Name}}</option>  
</select>  

。。。我的元素没有填充

如果我这样做：

<select class="span2" name="SelectedState" ng-model="selectedState"   
ng-change="getCities()" ng-options="state.ID as state.Name for state in states">  
    <option></option>  
</select>  

<select class="span6" name="SelectedCity" ng-model="selectedCity"  
ng-options="city.ID as city.Name for city in cities">  
    <option></option>  
</select>  

<select class="span2" name="SelectedState" ng-model="selectedState"   
ng-change="getCities()">  
    <option ng-repeat="state in states" value="state.ID">{{state.Name}}</option>  
</select>  

<select class="span6" name="SelectedCity" ng-model="selectedCity">  
    <option ng-repeat="city in cities" value="city.ID">{{city.Name}}</option>  
</select>  

{{state.Name}
{{city.Name}

现在，这些值被填充到元素中。尽管如此，如果我更改“selectedState”范围变量的值，我的元素没有“选择”正确的值

有人知道为什么吗

---

非常感谢你

好的，所以实际上问题出在

ng型号

和

ng选项

之间

当您这样做时：

<select class="span6" name="SelectedCity" ng-model="selectedCity"  
ng-options="city.ID as city.Name for city in cities"></select>

请检查此表中的结果

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它能解决您的问题吗？

您能发布一个states数组的示例数据吗。我问这个问题是因为，如果我在本地测试它而不更改代码，那么你说不工作的选项就是工作的。是州和市都不来，还是只有州不来？