public override void Request()
{
if (realsubject == null)
{
realsubject = new RealSubject();
}
realsubject.Request();
}
public override string Request()
{
if (realSubject == null)
{
realSubject = new RealSubject();
}
return(realSubject.Request());
}
public override void Request()
{
if (_realSubject == null)
{
_realSubject = new RealSubject();
}
_realSubject.Request();
}
public void Request()
{
if (RealSubject == null)
{
RealSubject = new RealSubject(this.Data); // Here you could get the data from the database, for example.
}
RealSubject.Request();
}
//The most common applications of the Proxy pattern are lazy loading, caching, controlling the access, logging, etc.
//A Proxy can perform on of these things and then, depending on the result, pass the execution to the same method
//in a linked RealSubject object.
public void Request()
{
if (CheckAccess())
{
_realSubject.Request();
LogAccess();
}
}
public override void Request()
{
//use lazy initialization
if (_realSubject == null)
{
_realSubject = new RealSubject();
}
_realSubject.Request();
}
static void Main(string[] args)
{
// canonical
var subject = new RealSubject();
subject.Request();
var proxy = new Proxy.Canonical.Proxy();
proxy.Request();
// live
Console.WriteLine();
var image = new ProxyImage("C://temp.jpq");
// will be loaded lazyly
image.Display();
// wont be loaded 2nd time
image.Display();
}
public override void Request()
{
//实例一个真实用户
realSubject = new RealSubject();
realSubject.Request();//调用真实用户的方法
}