In computer programming, a callback is a reference to executable code, or a piece of executable code, that is passed as an argument to other code. This allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer.
Lets see how we can implement the same in C# using Action(function object).
In the below example we have a class called CallbackExample with a DoSomething() method which counts from 0 to 9 with a delay of 1 second. Within an application we can't wait for 10 seconds for the process to completed that why we implement a callback called Callback which takes an object as parameter and this been invoked once the for loop completes counting from 0-9.
There is an important check to see if the callback is not null before invoking it, this handles a situation when callback is not been registered in the other end.
The main method registered the Callaback to display a message into the console before it calls the DoSomething method.
Lets see how we can implement the same in C# using Action(function object).
In the below example we have a class called CallbackExample with a DoSomething() method which counts from 0 to 9 with a delay of 1 second. Within an application we can't wait for 10 seconds for the process to completed that why we implement a callback called Callback which takes an object as parameter and this been invoked once the for loop completes counting from 0-9.
There is an important check to see if the callback is not null before invoking it, this handles a situation when callback is not been registered in the other end.
The main method registered the Callaback to display a message into the console before it calls the DoSomething method.
