Delegates and events
Delegates and events are important concepts in C# that facilitate the implementation of event-driven and callback-based programming. They provide a way to define and handle events, enabling communication between different components of a program. Let’s explore delegates and events in C#:
- Delegates:
- A delegate is a type that represents a reference to a method.
- Delegates allow you to treat methods as entities that can be assigned to variables and passed as parameters.
- Delegates are used to implement callback mechanisms and event handling.
- Delegates are declared using the delegate keyword.
Example:
public delegate void MyDelegate(string message);
public class MyClass
{
public void DisplayMessage(string message)
{
Console.WriteLine(message);
}
}
// Usage:
MyClass obj = new MyClass();
MyDelegate delegateObj = obj.DisplayMessage;
delegateObj(“Hello, delegates!”);
// Output:
// Hello, delegates!