.NET 下运用策略模式(组合行为和实体的一种模式)

static void Main(string[] args) 
{ 
int[] array = new int[] { 3, 2, 8, 1, 5 }; 
//相当于是重新设置了一个排序策略 
Array.Sort(array, (a, b) => b - a); 
//这里也相当于为每个元素安排了一个

using System; 
using System.Linq; 
namespace StrategyPattern 
{ 
class Program 
{ 
static void Main(string[] args) 
{ 
UITest test = new UITest(); 
test.RunTest(); 
test.SetProxy("zh-cn"); 
test.RunTest(); 
} 
} 
class UITest 
{ 
Action proxyStrategy; 
//Default is US market 
public UITest(String market = "en-us") 
{ 
setProxy(market); 
} 
public void SetProxy(String market) 
{ 
setProxy(market); 
} 
private void setProxy(String market) 
{ 
Type proxy = typeof(Proxy); 
var m = (from i in proxy.GetMethods() 
from j in i.GetCustomAttributes(false) 
let k = j as Market 
where k != null 
&& k.MarketName.Contains(market) 
select i).First(); 
proxyStrategy = (Action)Delegate.CreateDelegate(typeof(Action), null, m); 
} 
public void RunTest() 
{ 
proxyStrategy(); 
//之后运行主要的功能测试 
//...... 
} 
} 
class Market : Attribute 
{ 
public String MarketName { get; set; } 
public Market(String marketName) 
{ 
this.MarketName = marketName; 
} 
} 
class Proxy 
{ 
[Market("en-us,es-us")] 
public void SetUSProxy() 
{ 
Console.WriteLine("us proxy"); 
} 
[Market("zh-cn")] 
public void SetChinaProxy() 
{ 
Console.WriteLine("china proxy"); 
} 
[Market("en-gb")] 
public void SetUKProxy() 
{ 
Console.WriteLine("uk proxy"); 
} 
} 
}