C#实现单件模式的三种常用方法
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
publicsealedClassSingleton
{
privatestaticReadOnlySingletoninstance=newSingleton();
privateSingleton(){}
publicstaticSingletonInstance
{
get
{
returninstance;
}
}
}
方法2
publicsealedClassClassicSingleton
{
privatestaticClassicSingletoninstance;
privatestaticobjectSyncRoot=newObject();
privateClassicSingleton(){}
publicstaticClassicSingletonInstance
{
get
{
if(instance==null)
{
lock(SyncRoot)
{
if(instance==null)
{
instance=newClassicSingleton();
}
}
}
returninstance;
}
}
}
方法3
publicClassSingleton
{
privatestaticSingletoninstance;
//Addedastaticmutexforsynchronisinguseofinstance.
privatestaticSystem.Threading.Mutexmutex;
privateSingleton(){}
staticSingleton()
{
instance=newSingleton();
mutex=newSystem.Threading.Mutex();
}
publicstaticSingletonAcquire()
{
mutex.WaitOne();
returninstance;
}
//EachcalltoAcquire()requiresacalltoRelease()
publicstaticvoidRelease()
{
mutex.ReleaseMutex();
}
}
希望本文所述对大家的C#程序设计有所帮助。