Proxy in C#
Why read if you can watch?
Watch Proxy's video tutorialProvides a surrogate or placeholder for another object to control access to it.
This structural code demonstrates the Proxy pattern which provides a representative object (proxy) that controls access to another similar object.
using System;
// MainApp test application
class MainApp
{
static void Main()
{
// Create proxy and request a service
Proxy proxy = new Proxy();
proxy.Request();
// Wait for user
Console.Read();
}
}
// "Subject"
abstract class Subject
{
public abstract void Request();
}
// "RealSubject"
class RealSubject : Subject
{
public override void Request()
{
Console.WriteLine("Called RealSubject.Request()");
}
}
// "Proxy"
class Proxy : Subject
{
RealSubject realSubject;
public override void Request()
{
// Use 'lazy initialization'
if (realSubject == null)
{
realSubject = new RealSubject();
}
realSubject.Request();
}
}
Called RealSubject.Request()
