Building e-Commerce Sites with the .NET Framework

Delegates and Events

Delegates are the type-safe, secure, managed equivalents of C++ function pointers. You can use delegates with instance, virtual, or static methods. Another way to think about delegates is as encapsulating a specific method. In .NET, delegates are also used for events and callback functions.

Delegates are implemented by inheriting from System.Delegate and supporting a list of methods executed when the delegates are invoked. Listing A.27 shows the use of a delegate.

Listing A.27. Delegates

1: using System; 2: 3: delegate void MessageDelegate(); 4: 5: public class MyClass{ 6: public void WriteMessage (){ 7: Console.WriteLine("I made this."); 8: } 9: } 10: 11: public class MyClassTester{ 12: static public void Main (){ 13: MyClass ...