How to call a function from another controller in AngularJS? [duplicate]

I need to call a function in another controller in AngularJS. How can I do this?

Code:

app.controller('One', ['$scope',
    function($scope) {
        $scope.parentmethod = function() {
            // task
        }
    }
]);

app.controller('two', ['$scope',
    function($scope) {
        $scope.childmethod = function() {
            // Here i want to call parentmethod of One controller
        }
    }
]);

Solution 1:

Communication between controllers is done though $emit + $on / $broadcast + $on methods.

So in your case you want to call a method of Controller "One" inside Controller "Two", the correct way to do this is:

app.controller('One', ['$scope', '$rootScope'
    function($scope) {
        $rootScope.$on("CallParentMethod", function(){
           $scope.parentmethod();
        });

        $scope.parentmethod = function() {
            // task
        }
    }
]);
app.controller('two', ['$scope', '$rootScope'
    function($scope) {
        $scope.childmethod = function() {
            $rootScope.$emit("CallParentMethod", {});
        }
    }
]);

While $rootScope.$emit is called, you can send any data as second parameter.

Solution 2:

I wouldn't use function from one controller into another. A better approach would be to move the common function to a service and then inject the service in both controllers.