Abstract Constructors RSS

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  jthg

  Member

  207 Points

  49 Posts

  Abstract Constructors

  Mar 28, 2005 10:14 PM|LINK

  Is there any way to create an abstract class that forces all inherited classes to have a constructor with certain parameters? Thanks.
  
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  timmcb

  Contributor

  2379 Points

  471 Posts

  Microsoft

  Re: Abstract Constructors

  Mar 28, 2005 11:43 PM|LINK

  You could make the default constructor private like below:

      public class Class1
      {
          protected Class1(int p1)
          {
              Debug.WriteLine("RequiredParam " + p1.ToString());
          }

          private Class1()
          {
          }
      }

      public class Class2 : Class1
      {
          public Class2(int p1) : base(p1)
          {
          }
      }

  This won't force a particular constructor signature on the derrived class but it will force the base constructor to be called with the appropriate params.

  Tim McBride
  
  This posting is provided "AS IS" with no warranties, and confers no rights.
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  JeffreyABeck...

  All-Star

  16423 Points

  3329 Posts

  Re: Abstract Constructors

  Mar 29, 2005 11:29 AM|LINK

  Is the class you're thinking of defining completly abstract? If so, you may really want to be defining an Interface, not a class. 
  If the answer I provided is useful or informative please check the "answer" button.
  
  Warning: Code is often uncompiled and possibly started life written on the back of a napkin. Beware typos.