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Newbie Question - VB6 GetObject in .net

Posted on 2004-03-31
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Last Modified: 2008-02-26
Hi all

This will be a real easy one I imagine but thought I'd ask anyway - I'm writing a software package that has both web and windows form components that share a common data access layer. One ofthe requirements is to manage the number of concurrent licences used on both platforms. I want to create what in old VB6 in an ActiveX Exe that stays in memory and my apps simply add the users names in and out when they log in/out. I also want to be able to return these detals from the class for admin purposes.

In VB6 I would create a ActiveX and run it then use getObject to get a reference the app. What the equivilent or best pratice to do this in .net.

Many thanks in advance

Graham
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Question by:GillyTheTaffy
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6 Comments
 
LVL 2

Expert Comment

by:DonRameshSachin
ID: 10729626
HI,
 In .NET there is no concept of ActiveX Exe or ActiveX DLL. Probably u can use Class library project (.DLL) to achieve ur requirement.

Don
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LVL 1

Author Comment

by:GillyTheTaffy
ID: 10729632
Actually found what I was looking for - the Shared keyword for variables was exactly what I was looking for

cheers anyway
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Expert Comment

by:DonRameshSachin
ID: 10729669
Hi,
 basically,
 Shared variables are created in the Global memory (heap) and it will be available through out the application  life time. Shared is equivalent to Static in C++.  These Shared variables or methods are not bound to the class. So they will be available anywhere inside the project. They will be created in the global memory only once when they are invoked.

Don
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LVL 1

Author Comment

by:GillyTheTaffy
ID: 10729734
Yep - thats pretty much what I was looking for. Basically I will have a class that stores user details so that we can cap the number of users and also retreive the details while the ASP.net application is active.  I didn't want to have to connect to a database each time someone logs in via the web to update the info.

thanks again for your comments

Graham
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Author Comment

by:GillyTheTaffy
ID: 10736853
Dan,

There is an alternative way I suppose - I could just create an standard windows exe and not have it dispay anything - is there any benefit to doing it that rather than using a class with shared variables ? I think using the shared variables is a bit tidier but am not sure if they have any impact on performance/load etc.
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Accepted Solution

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DonRameshSachin earned 150 total points
ID: 10738752
Hi
I feel the best way is to use class and shared variables/methods rather going for a standard exe.
Shared variables/ methods will be initialized only once and will available through out ur application.

Don
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