Restriction of class for instatiate maximum 3 times.

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

Posted 21-Jan-10 1:16am

Yogesh M Patil

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3 solutions

Solution 1

You may use the Singleton design pattern.
:)

Posted 21-Jan-10 1:31am

CPallini

Solution 4

C#

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

Singleton creates single instance,

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

Posted 21-Jan-10 2:21am

Indrajeet Sutar

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Toli Cuturicu · Accepted Answer · 2010-01-21T02:09:00

C#

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 Note: Added lock for thread safety.