Read Data From One Controller To Another - angularjs

Question

I've two controllers and two views in ASP.NET MVC project. My requirement is to pass data from one controller to another on ng-click that should reflect in another view (As well from another controller). Simple! I know, it could be done using service but I was preferring for testing purpose $broadcast and $on. So I tried the following:
app.controller('FirstController', function ($rootScope, $scope, productService) {
$scope.showData = function (m) { //This is the event on which I'll get data in another controller as well in another view
alert(m); //This works and gets a name from the first view
$rootScope.$broadcast('sample', $scope.m); //This is what I am using to deliver in another controller
}
});
app.controller('SecondController', function ($scope) {
$scope.$on('sample', function (events, d) {
alert(d);
})
In another view, I used something like this:
<div ng-app="app" ng-controller="SecondController">
<ul class="nav navbar-nav">
<li> Product {{ m }}</li>
</ul>
</div>
Actually I am doing this all for demo purpose. But unfortunately, the above doesn't work. Am I missing something?
Update 1 - See the updated code:
app.controller('FirstController', function ($rootScope, $scope, productService) {
$scope.showData = function (m) { //This is the event on which I'll get data in another controller as well in another view
alert(m); //This works and gets a name from the first view
$timeout(function () {
$scope.$broadcast('sample', m);
});
}
});
app.controller('SecondController', function ($scope) {
$scope.$on('sample', function (events, d) {
alert(d);
})

Answer 1

In your scenario it will not work in one case:
You call $rootScope.$broadcast('sample', $scope.m); before
$scope.$on() is registered to listen on 'sample event a.e. before SecondController is created.
If you know that SecondController is created , you can wrap $rootScope.$broadcast('sample', $scope.m); with $timeout. a.e.:
$timeout(function(){
$rootScope.$broadcast('sample', $scope.m);
});
In this case $broadcast execution will be moved to end of events queue a.e. before next digest cycle that will be guarantee that Second Controller has been created and $scope.$on() is registered.

Answer 2

It's not entirely clear how you are using the second view & controller. Is it somewhere within the template that FirstController is assigned to? Seeing the template assigned to FirstController would help clarify. In any case, I've attached a simple plunker which shows how you can broadcast an event from a button click to a second controller.
https://plnkr.co/edit/KzNftVAYwPuCvsnflIz