Solved

Public/Shared/Protected variables in VB.NET

Posted on 2006-07-04
6
690 Views
Last Modified: 2006-11-18
I would like to know the difference between
Public/Shared/Protected variables in VB.NET

thanks
0
Comment
Question by:jskfan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 17036689
Public means it is available to everything.
Shared means that the method/field belongs to the class rather than to an instance of the class.
Protected means it is available to the class in which it is declared and any derived classes.
0
 
LVL 8

Assisted Solution

by:kaliyugkaarjun
kaliyugkaarjun earned 20 total points
ID: 17036967
Hi

just checkout this link
http://www.ondotnet.com/pub/a/dotnet/2003/05/20/introvbnetoo.html?page=1

Also shared variable are private by default.
0
 

Author Comment

by:jskfan
ID: 17050004
let me see if i understand:

1 - if I declare a class / function or procedure/ variable as public, it means it's accessible through the whole projects.

2-if I  declare a function /procedure , variable as shared , it means that I can use them from another class without instanciating them.

3- if I  declare a function /procedure , variable as protected , it means that I can use them from another class but I should instanciating them.

0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 52

Expert Comment

by:Carl Tawn
ID: 17050070
1- Yes.
2 - Yes.
3 - No.

An example:

Public Class Base
    Protected name As String

End Class

Public Class Derived
    Inherits Base

    Public Sub New()
        Me.name = "Bob"       '// Can access name because Derived inherits from Base where name is declared protected
    End Sub
End Class

Public Class Other
    Public Sub New()
        Dim obj As New Base()
        obj.name = "Wilbur"             '// Cannot access "name" in Base because it is protected and we do not inherit from Base
    End Sub
End Class
0
 

Author Comment

by:jskfan
ID: 17051034
I thought when you declare a class as public , other classes can use its methods and variables without declaring them as protected.
0
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 230 total points
ID: 17051100
If a method is public it can be used by any other object. If it is protected then it can only be accessed by the class it is declared in, or any class that derives from the class in which it is declared, it is not publicly available to any other object unless it exposed by the class in a public property or method.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

It’s quite interesting for me as I worked with Excel using vb.net for some time. Here are some topics which I know want to share with others whom this might help. First of all if you are working with Excel then you need to Download the Following …
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question