Data in a Module

[Lee Silver]

We are in the process of converting a VB-6 DLL with about 100 classes to .NET as
part of the process of transforming a VB-6 app into an ASP app. Data that is
used by more than one of the Classes (e.g. configuration) is stored in variables
in a Module in the DLL.

Question: When more than one user is using the ASP app (and hence the DLL) at
the same time, do they have separate instances of the Module-level data or is
that shared amongst all users?

--
// Lee Silver
// Information Concepts Inc.
// http://www.information-concepts.com

Facilitating the automated conversion of Data into Information
since 1982

[Kevin Spencer]

A VB.net Module is the same as a Shared Class. Everything in it is Shared.

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
Big things are made up
of lots of little things.

"Lee Silver" <LS*****@information-concepts.com> wrote in message
news:lu***********************@news4.srv.hcvlny.cv .net...

We are in the process of converting a VB-6 DLL with about 100 classes to ..NET as part of the process of transforming a VB-6 app into an ASP app. Data that is used by more than one of the Classes (e.g. configuration) is stored in variables in a Module in the DLL.

Question: When more than one user is using the ASP app (and hence the DLL) at the same time, do they have separate instances of the Module-level data or is that shared amongst all users?

--
// Lee Silver
// Information Concepts Inc.
// http://www.information-concepts.com

Facilitating the automated conversion of Data into Information
since 1982

[Lee Silver]

Kevin:

Thanks for the fast response.

A VB.net Module is the same as a Shared Class. Everything in it is Shared.

I suspected that was true because I thought I remembered reading it somewhere;
but I wasn't sure what the ramifications were for an ASP app.

I guess a little re-designing is in order.
--
// Lee

[MSFT]

Hi Lee Silver ,
Thank you for using Microsoft Newsgroup Service. Based on your description,
youp're converting a set of vb6 dlls to dotnet dlls and use them in ASP.NET
web application. Also, you want to know the Module-level data in VB.NET is
shared as you put many data which will be used by several classes in the
VB.NET module? Please correct me if my understanding is not quite exact.
First, in ASP.NET, every webapplication run within AppDomain which is
smaller than a process. And Each web request from the client will be
processed in seperate thread. And the dlls(.net assembly) the web
application used are all shared in the same webapplications. For more
information on the Asp.net webapplication's runtime, you can view the tech
article throuth the following link:
http://msdn.microsoft.com/library/en...PNETHTTPRuntim
e.asp?frame=true
As for the "Module" in VB.NET, yes, just like what Kevin said, it is the
same as a shared class, you can put some shared functions there. But in
VB.NET or C# there is no global variables, you can use the Class's static
members to provide the same function.

If you have any questions on it, please feel free to let me know.
Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

[Lee Silver]

Steven:

Thanks for confirming what Kevin said. Like I said to him,
a little re-design will solve the problem.

--
// Lee Silver
// Information Concepts Inc.

-----Original Message-----
Hi Lee Silver ,
Thank you for using Microsoft Newsgroup Service. Based on your description, youp're converting a set of vb6 dlls to dotnet dlls and use them in ASP.NET web application. Also, you want to know the Module-level data in VB.NET is shared as you put many data which will be used by several classes in the VB.NET module? Please correct me if my understanding is not quite exact.

First, in ASP.NET, every webapplication run within AppDomain which is smaller than a process. And Each web request from the client will be processed in seperate thread. And the dlls(.net assembly) the web application used are all shared in the same webapplications. For more information on the Asp.net webapplication's runtime, you can view the tech article throuth the following link:
http://msdn.microsoft.com/library/en...PNETHTTPRuntim
e.asp?frame=true
As for the "Module" in VB.NET, yes, just like what Kevin said, it is the same as a shared class, you can put some shared functions there. But in VB.NET or C# there is no global variables, you can use the Class's static members to provide the same function.

If you have any questions on it, please feel free to let me know.

Steven Cheng
Microsoft Online Support