C#实现单件模式的三种常用方法

2020-01-24 02:03:02

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本文实例讲述了C#实现单件模式的三种常用方法。分享给大家供大家参考。具体分析如下：

单件模式是一种设计模式，即保持同时只能创建一个实例，下面列出了C#实现单件模式的三种方法

方法1

public sealed Class Singleton{  private static ReadOnly Singleton instance = new Singleton();  private Singleton(){}  public static Singleton Instance  {  get  {   return instance;  }  }}

方法2

public sealed Class ClassicSingleton{ private static ClassicSingleton instance; private static object SyncRoot = new Object (); private ClassicSingleton(){} public static ClassicSingleton Instance {  get  {   if(instance == null)   {    lock (SyncRoot)    {     if(instance == null)     {      instance = new ClassicSingleton ();     }    }   }   return instance;  } }}

方法3

public Class Singleton{ private static Singleton instance; // Added a static mutex for synchronising use of instance. private static System.Threading.Mutex mutex; private Singleton(){} static Singleton () {  instance = new Singleton();  mutex = new System.Threading.Mutex(); } public static Singleton Acquire() {  mutex.WaitOne ();  return instance; } // Each call to Acquire () requires a call to Release() public static void Release() {  mutex.ReleaseMutex(); }}

希望本文所述对大家的C#程序设计有所帮助。

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