So instead of:
Experts myExperts = new Experts();
you would use:
Experts myExperts = Experts.Instance();
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Question
Single instance of a form / class - URGENT 500 Points
Hi Experts,
How do I limit a form or a class to only allow one instance? ShowDialog() is not a possibilty.
Thanks
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Answers
Here is a link to Microsoft's patterns and practices page on implementing singletons in C#
http://msdn.microsoft.com/
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by: randydandyPosted on 2004-02-12 at 15:12:45ID: 10347854
This is called the singleton design pattern, and can be implemented by making the constructor of the class private and using a static field to maintain the one instance of the class. Here is a simple example:
public class Experts {
private static Experts _instance; // the private field maintaining the one instance of this class
private int _numExperts;
// note constructor is private
private Experts() {
_numExperts = 50000;
}
// get the one instance of this object.
public static Experts Instance() {
if(_instance == null) _instance = new Experts(); // create new instance if necessary
return _instance;
}
// example property
public int NumExperts {
get { return _numExperts; }
set { _numExperts = value; }
}
}