分享一个单例模型类 Singleton

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分享一个单例模型类 Singleton

2023-02-27 21:15| 来源: 网络整理| 查看: 265

每个对象都写单例，单调又无聊。因此我写了个基类，只要集成，就实现了单例。

而且支持多单例（不同id对应不同的单例）

using System; using System.Collections.Generic; using System.Text;

namespace Pixysoft.DesignPattern{ public class Singleton { private Dictionary dict = new Dictionary ();

private string _id = null ;

private static volatile object instance;

private static object syncRoot = new Object();

public static T Instance { get { if (instance == null ) { lock (syncRoot) { instance = Activator.CreateInstance( typeof (T)); } }

return (T)instance;

} }

public T this [ string id] { get { // 如果是null，表示自己，则直接返回Instance if ( string .IsNullOrEmpty(id)) return Instance;

= id.Trim().ToUpper();

lock (syncRoot) { if (dict.ContainsKey(id)) return dict[id];

object i = Activator.CreateInstance( typeof (T));

((Singleton

)i)._id = id;

T it

= (T)i;

dict.Add(id, it);

return it; } } }

public T this [ int index] { get { if (index dict.Keys.Count - 1 ) return Instance;

int coutner = 0 ;

foreach ( string key in dict.Keys) { if (coutner >= index) return dict[key];

coutner

++ ; }

return Instance;

} }

public string SingletonId { get { return _id; } } }}

使用方法：

class testclass { private void test() { Hello.Instance.Test();

Hello.Instance[

" id " ].Test(); } }

public class Hello : Singleton {

public void Test() { Console.Write( " hello " ); } }

每个对象都写单例，单调又无聊。因此我写了个基类，只要集成，就实现了单例。

而且支持多单例（不同id对应不同的单例）

using System; using System.Collections.Generic; using System.Text;

namespace Pixysoft.DesignPattern{ public class Singleton { private Dictionary dict = new Dictionary ();

private string _id = null ;

private static volatile object instance;

private static object syncRoot = new Object();

public static T Instance { get { if (instance == null ) { lock (syncRoot) { instance = Activator.CreateInstance( typeof (T)); } }

return (T)instance;

} }

public T this [ string id] { get { // 如果是null，表示自己，则直接返回Instance if ( string .IsNullOrEmpty(id)) return Instance;

= id.Trim().ToUpper();

lock (syncRoot) { if (dict.ContainsKey(id)) return dict[id];

object i = Activator.CreateInstance( typeof (T));

((Singleton

)i)._id = id;

T it

= (T)i;

dict.Add(id, it);

return it; } } }

public T this [ int index] { get { if (index dict.Keys.Count - 1 ) return Instance;

int coutner = 0 ;

foreach ( string key in dict.Keys) { if (coutner >= index) return dict[key];

coutner

++ ; }

return Instance;

} }

public string SingletonId { get { return _id; } } }}

使用方法：

class testclass { private void test() { Hello.Instance.Test();

Hello.Instance[

" id " ].Test(); } }

public class Hello : Singleton {

public void Test() { Console.Write( " hello " ); } }

每个对象都写单例，单调又无聊。因此我写了个基类，只要集成，就实现了单例。

而且支持多单例（不同id对应不同的单例）

using System; using System.Collections.Generic; using System.Text;

namespace Pixysoft.DesignPattern{ public class Singleton { private Dictionary dict = new Dictionary ();

private string _id = null ;

private static volatile object instance;

private static object syncRoot = new Object();

public static T Instance { get { if (instance == null ) { lock (syncRoot) { instance = Activator.CreateInstance( typeof (T)); } }

return (T)instance;

} }

public T this [ string id] { get { // 如果是null，表示自己，则直接返回Instance if ( string .IsNullOrEmpty(id)) return Instance;

= id.Trim().ToUpper();

lock (syncRoot) { if (dict.ContainsKey(id)) return dict[id];

object i = Activator.CreateInstance( typeof (T));

((Singleton

)i)._id = id;

T it

= (T)i;

dict.Add(id, it);

return it; } } }

public T this [ int index] { get { if (index dict.Keys.Count - 1 ) return Instance;

int coutner = 0 ;

foreach ( string key in dict.Keys) { if (coutner >= index) return dict[key];

coutner

++ ; }

return Instance;

} }

public string SingletonId { get { return _id; } } }}

使用方法：

class testclass { private void test() { Hello.Instance.Test();

Hello.Instance[

" id " ].Test(); } }

public class Hello : Singleton {

public void Test() { Console.Write( " hello " ); } }

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分享一个单例模型类 Singleton

分享一个单例模型类 Singleton

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