选择NG选项更改时获得价值 [英] Get value when selected ng-option changes
问题描述
我在我的.html页面下拉列表,
I have in my .html page a dropdown list,
下拉:
<select ng-model="blisterPackTemplateSelected" data-ng-options="blisterPackTemplate as blisterPackTemplate.name for blisterPackTemplate in blisterPackTemplates">
<option value="">Select Account</option>
</select>
我要执行,当用户选择一个值的动作。所以,在我的控制器我所做的:
I want to execute an action when the user select a value. So In my controller I did:
控制器:
$scope.$watch('blisterPackTemplateSelected', function() {
alert('changed');
console.log($scope.blisterPackTemplateSelected);
});
但改变在DropDownList值不会触发code: $ $范围手表('blisterPackTemplateSelected',函数()
因此,我试着用另一种方法: ng_change ='changedValue()
在选择标签
As a result I tried another method with a : ng_change='changedValue()'
on the select tag
和
功能:
$scope.changedValue= function() {
console.log($scope.blisterPackTemplateSelected);
}
但是blisterPackTemplateSelected存储到一个子范围。我读的父母无法获得对该子女的探视范围。
But the blisterPackTemplateSelected is stored into a child scope. I read that the parent can't get access to the child scope.
什么是执行一些正确的/最好的方式,当在下拉列表改变选择的价值呢?如果它的方法1,我在我的code做错了吗?
What is the correct/best way to execute something when a selected value in a dropdown list changes? If it's method 1, what am I doing wrong with my code?
推荐答案
作为阿尔乔姆说你需要使用 ngChange ,并通过ngModel对象作为参数传递给你的ngChange功能
as Artyom said you need to use ngChange and pass ngModel object as argument to your ngChange function
示例
<div ng-app="App" >
<div ng-controller="ctrl">
<select ng-model="blisterPackTemplateSelected" ng-change="changedValue(blisterPackTemplateSelected)"
data-ng-options="blisterPackTemplate as blisterPackTemplate.name for blisterPackTemplate in blisterPackTemplates">
<option value="">Select Account</option>
</select>
{{itemList}}
</div>
</div>
JS:
function ctrl($scope){
$scope.itemList=[];
$scope.blisterPackTemplates=[{id:1,name:"a"},{id:2,name:"b"},{id:3,name:"c"}]
$scope.changedValue=function(item){
$scope.itemList.push(item.name);
}
}
活生生的例子: http://jsfiddle.net/choroshin/9w5XT/4/
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