how to count the checkbox which was checked using angular?
Question
Here, I used $watch to display the counter value.
But the counter value not increased yet,
To Count,
$scope.$watch('items', function(items){
var selectedItems = 0;
angular.forEach(items, function(item){
selectedItems += item.selected ? 1 : 0;
})
$scope.selectedItems = selectedItems;
}, true);
In UI,
<div class="col-sm-4" ng-repeat="item in items">
<label class="chkbox-holder cbox mbot10" for="List-{{$index}}"><input ng-model="item.Selected" type="checkbox" id="List-{{$index}}"><label for="List-{{$index}}"></label>{{item.name}}</label>
</div>
To display the counter value,
<div>Selected Items Length: {{selectedItems}}</div>
But still the counter is 0;
JSON Value from http service is,
[
{
"id": 1,
"refCode": "",
"name": "pragadees"
},
{
"id": 2,
"refCode": "",
"name": "pragadees"
}......]
Can anyone please help on this.
3 answers
solution1
1 ACCPTED 2016-11-28 13:40:13
You've just got a typo error. Your markup is bound to item.Selected while your JavaScript is checking for item.selected . Renaming them properly solves your problem. I'd recommend using lower key inside ot html.
<input ng-model="item.selected" type="checkbox" id="List-{{$index}}">
^-- See here
solution2
0 2016-11-28 13:47:53
first of all, you got a typo in your ng-model, it is item.selected not item.Selected that's maybe why it does not match nothing...
And this is how i'll write it, using basic angular two way data binding, no extra counters, watches, triggers, ....
angular.module('myApp', []); angular.module('myApp').controller('Ctrl', ['$scope', function($scope) { $scope.items = [{ name: "Doe" }, { name: "Adam" }, { name: "Ado" }, { name: "Brown" }, { name: "Heather" }, { name: "Stan" }]; $scope.itemsSelected = function() { return $scope.items.filter(function(i) { return i.selected }).length; } } ]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <body ng-app="myApp" ng-controller="Ctrl"> <h2>current active selected options {{ itemsSelected() }}</h2> <ul> <div ng-repeat="item in items"> <label for="List-{{$index}}"> <input ng-model="item.selected" type="checkbox" id="List-{{$index}}"> <label for="List-{{$index}}"></label>{{item.name}}</label> </div> </ul> </body>
solution3
-1 2016-11-28 13:39:44
You can use ng-change instead:
var app = angular.module("app", []); app.controller("myCtrl", function($scope) { $scope.items = [ {name: 'A', value: 'a'}, {name: 'B', value: 'b'}, {name: 'C', value: 'c'}, {name: 'D', value: 'd'}, {name: 'E', value: 'e'} ]; $scope.counter = 0; $scope.change = function(e) { if(e){ $scope.counter +=1; }else{ if($scope.counter > 0) $scope.counter -=1; } }; });
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="app" ng-controller="myCtrl"> <div class="col-sm-4" ng-repeat="item in items"> <label class="chkbox-holder cbox mbot10" for="List-{{$index}}"> <input ng-model="item.Selected" type="checkbox" id="List-{{$index}}" ng-change="change(item.Selected)"> <label for="List-{{$index}}"></label>{{item.name}}</label> </div> Counter: {{counter}} </div>
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