s*****w
发帖数: 1527 | 1 this is the compiled code, in the end i got "get 0", instead of "get
30".
why ?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace test2
{
class MainApp
{
static void Main()
{
ConcreteComponent c = new ConcreteComponent(5);
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
ConcreteDecoratorB d2 = new ConcreteDecoratorB();
d1.SetComponent(c);
|
c**t
发帖数: 2744 | 2 ConcreateDecoratorB has its own localComponent with initial val: 0.
That's why you got 0.
this is the compiled code, in the end i got "get 0", instead of "get
30".
why ?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace test2
{
class MainApp
{
static void Main()
{
ConcreteComponent c = new ConcreteComponent(5);
ConcreteDecoratorA d1 = new ConcreteDecoratorA();
【在 s*****w 的大作中提到】
: this is the compiled code, in the end i got "get 0", instead of "get
: 30".
: why ?
: using System;
: using System.Collections.Generic;
: using System.Linq;
: using System.Text;
: namespace test2
: {
: class MainApp
|
c**t
发帖数: 2744 | 3 in your SetComponent
{
this.localComponent = component;
if( component is ConcreateDecorationA)
localComponent.var = ((ConcreateDecoratorA)component).localComponent.
var;
}
if you set the var, you'll get 15.
【在 c**t 的大作中提到】
: ConcreateDecoratorB has its own localComponent with initial val: 0.
: That's why you got 0.
:
: this is the compiled code, in the end i got "get 0", instead of "get
: 30".
: why ?
: using System;
: using System.Collections.Generic;
: using System.Linq;
: using System.Text;
|
s*****w
发帖数: 1527 | 4 Hi cogt,
thanks for reply 1st.
your solution is kind of against decorator pattern.
if i have DecoratorA/B/C/D/E/F/..., the code will be very complicated.
basically i'm looking for the correct/efficient way to do decorator in
c#.
((ConcreateDecoratorA)component).localComponent.
【在 c**t 的大作中提到】
: in your SetComponent
: {
: this.localComponent = component;
: if( component is ConcreateDecorationA)
: localComponent.var = ((ConcreateDecoratorA)component).localComponent.
: var;
: }
: if you set the var, you'll get 15.
|
X****r
发帖数: 3557 | 5 Make val private, add get/set accessors for val, and override them
in Decorator class to read/write the val of its localComponent.
【在 s*****w 的大作中提到】
: Hi cogt,
: thanks for reply 1st.
: your solution is kind of against decorator pattern.
: if i have DecoratorA/B/C/D/E/F/..., the code will be very complicated.
: basically i'm looking for the correct/efficient way to do decorator in
: c#.
:
: ((ConcreateDecoratorA)component).localComponent.
|
c**t
发帖数: 2744 | 6 solution:
class ConcreteDecoratorA : Decorator
{
public override void Operation()
{
base.Operation();
Console.WriteLine("ConcreteDecoratorA.Operation()");
localComponent.var *= 2;
var = localComponent.var;
localComponent.get();
}
}
class ConcreteDecoratorB : Decorator
{
public override void Operation()
{
base.Operation();
AddedBehavior();
Console
【在 s*****w 的大作中提到】
: Hi cogt,
: thanks for reply 1st.
: your solution is kind of against decorator pattern.
: if i have DecoratorA/B/C/D/E/F/..., the code will be very complicated.
: basically i'm looking for the correct/efficient way to do decorator in
: c#.
:
: ((ConcreateDecoratorA)component).localComponent.
|
s*****w
发帖数: 1527 | 7 it works, thanks a lot !
now i need to understand why this is simple in c++, but so complicated in
c#.
【在 c**t 的大作中提到】
: solution:
: class ConcreteDecoratorA : Decorator
: {
: public override void Operation()
: {
: base.Operation();
: Console.WriteLine("ConcreteDecoratorA.Operation()");
: localComponent.var *= 2;
: var = localComponent.var;
: localComponent.get();
|
s*****w
发帖数: 1527 | 8 cogt,
i still have trouble understanding this,
in c++ why it's much simpler ?
do you have easier ways to implement decorator ?
【在 c**t 的大作中提到】
: solution:
: class ConcreteDecoratorA : Decorator
: {
: public override void Operation()
: {
: base.Operation();
: Console.WriteLine("ConcreteDecoratorA.Operation()");
: localComponent.var *= 2;
: var = localComponent.var;
: localComponent.get();
|
n*w
发帖数: 3393 | |
n*w
发帖数: 3393 | 10 这个应该是最佳解决。
【在 X****r 的大作中提到】
: Make val private, add get/set accessors for val, and override them
: in Decorator class to read/write the val of its localComponent.
|
s*****w
发帖数: 1527 | 11 think i get it work like c++, finially |
