限制等级最多3次. [英] Restriction of class for instatiate maximum 3 times.

问题描述

我的应用程序只有一个类，我想将限制应用于对象创建.它只能在应用程序中实例化三个时间.

My Application has one class and i want to apply the restriction for objects creation. It can instantiate only three time in application.

推荐答案

private const int max = 3;
private static int counter = 0;
private static readonly object m_lock = new object();

public static MyClass CreateInstance()
{
    lock (m_lock)
    {
        return (++counter > max) ? null : new MyClass();
    }
}

private MyClass()
{

}

RS注意:为线程安全添加了锁定.

RS Note: Added lock for thread safety.

您可以使用 Singleton设计模式.
:)

You may use the Singleton design pattern.
:)

public class classname
{
   private static classname instance;
   private Singleton() {}
   public static classname Instance
   {
      get 
      {
         if (instance <= 3)
         {
            instance = new classname();
         }
         return instance;
      }
   }
}

Singleton创建单个实例，

我对此不确定，但这可能会有所帮助....

Singleton creates single instance,

I am not sure about this but, this may help....

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