Question

Simple Namespace Question

Asked by: imsolost

So I have a Namespace setup like this

Namespace 1

     Public Class A
         ...
     End Class

     Public Class B
         ...
     End Class

     Public Class C
         ...
     End Class

     Public Class D
         ...
     End Class

End Namespace

What I would like to do is only expose A,B and C and Make D only accessable to classes within the namespace.  I want to use D as a support class for A,B, and C but not allow it to be called directly.  

Any help would be great.  Thanks

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Asked On
2005-07-07 at 09:32:59ID21483639
Tags

namespace

,

class

,

only

,

question

,

simple

Topic

Microsoft Visual Basic.Net

Participating Experts
3
Points
500
Comments
6

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Answers

 

by: eventprostrategiesPosted on 2005-07-07 at 09:53:16ID: 14389256

Hmm ... good question.  Not entirely sure.

Not a final answer, but -- a workaround for the moment is to make the class private and stick it into each of the public classes.  Obviously not a final answer -- I'll be interested to see if it's doable, how you want it -- but, you can always stick a private class into another class (as a helper class or whatnot -- just don't expose methods that require the class as a parameter or return type).

Non-public classes have to be within other classes ... and I don't know how Public Classes can be picky/choosy over who can call them.

 

by: tpwellsPosted on 2005-07-07 at 10:10:05ID: 14389401

Try declaring Class D as Protected instead of Public.

http://www.startvbdotnet.com/language/datatypes.aspx

This site has a listing of the access specifiers and what they do.

 

by: eventprostrategiesPosted on 2005-07-07 at 10:12:50ID: 14389431

I tried that and got a design-time error -- Protected types can only be declared inside of a class.

 

by: jensfiedererPosted on 2005-07-07 at 10:33:43ID: 14389653


Define D as a protected class within superclass S

Let A, B, C Inherit from superclass S

 

by: jensfiedererPosted on 2005-07-07 at 10:36:44ID: 14389691

Other option is to declare A,B,C as "friend" classes of D

 

by: imsolostPosted on 2005-07-07 at 12:07:45ID: 14390623

Looks like this works best for what I was trying to do.  The SuperClass idea works but still opens me up more than I would like.

Thanks for the help.

20120131-EE-VQP-002

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