Callback method C#

Question

I need to create a callback method for my Commit method, just to know when it finished. So anyone know how to do that, how can I be able to call the commmit, then subscribe to the callback event/method to do other stuff when it is done.

Answer 1

Typically, in C#, you would do this via an event. The most common method for handling this would be to use the Event-based Asynchronous Programming model. This would define your API, by convention, as:

public void YourMethodAsync() {}  // starts your method
public Event EventHandler<YourEventArgs> YourMethodCompleted; // Event used to receive completion notification

That being said, if you're developing for .NET 4, you might want to consider designing your method around the Task or Task<T> class, instead. Instead of creating a callback, you can return a Task directly. This allows your user to create a task continuation that runs when the operation completes. In addition, future versions of C# will allow the user to take advantage of the await and async keywords currently in CTP form to ease development.