角js ng-change不起作用

Question

我有一個選擇下拉角js和新的角js。 的代碼是：

<select class="required_input_mandatory inputs" ng-options="o.ID as o.OrganizationName for o in OrganizationModel track by o.ID" ng-model="OrganizationOption" ng-change="GetUsers()"> 
    <option value="">-Select-</option> 
</select> 

雖然形式是在編輯模式下，HTML標記是

<select class="required_input_mandatory inputs ng-valid ng-not-empty ng-dirty ng-valid-parse ng-touched" ng-options="o.ID as o.OrganizationName for o in OrganizationModel track by o.ID" ng-model="OrganizationOption" ng-change="GetUsers()"> 
<option value="" class="" >-Select-</option> 
<option label="SHUK" value="1" selected="selected">SHUK</option> 
<option label="SHAU" value="2">Cowshed</option> 
<option label="SHNA" value="3">SHNA</option> 
<option label="SHEUR" value="4">SHEUR</option> 
</select> 

而且GetUsers：

$scope.GetUsers = function() { 
    var uid = $scope.OrganizationOption; 
    var getUser = NotificationSettingsController.GetUserByOrganization(uid);  
    getUser.then(function (pl) { $scope.SourceUser = pl.data; }, function (errorPl) { 
     console.log('Some Error in Getting Records.' + errorPl); 
    }); 
} 

選項 「淑」 被選中。現在在更改爲其他值時，將調用GetUsers()函數，但下拉列表中的選項會恢復並使「-Select-」選項處於選中狀態。

我該如何解決這個問題？

Answer 1

HTML代碼from here：

<select class="required_input_mandatory inputs" ng-options="o.ID as o.OrganizationName for o in OrganizationModel track by o.ID" ng-model="OrganizationOption" ng-change="GetUsers(o)"> 
    <option value="">-Select-</option> 
</select> 

JS代碼：

$scope.GetUsers = function(orgOption) { 
    var uid = orgOption; 
    var getUser = NotificationSettingsController.GetUserByOrganization(uid); 
    getUser.then(function (pl) { 
     $scope.SourceUser = pl.data; 
    }, 
    function (errorPl) { 
     console.log('Some Error in Getting Records.' + errorPl); }); 
    }); 
}