Re: Pointed in the right direction?

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Thanks for the response Walter. I am sort of familiar with what the pattern
is...I guess my question wasn't real clear. I want to create an application
that has base functionality. Or even a program that is a base shell. Then I
want to be able to add modules to this application as needed. Similar to
what a lot of Oracle integrators seem to do. Want Contact management? Here
is that module. Want Financial? here is that module...Need Job tracking?
Here is that module...

I think the provider pattern is what will provide me with that
functionality...but I have not found any information suggesting ways to code
the modules for pluggability. Are there resources that will show me how to
do this?

does that make better sense?


"Walter Wang [MSFT]" <wawang@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:HdrpIeDwGHA.5976@xxxxxxxxxxxxxxxxxxxxxxxx
Hi Eric,

Based on my understanding, your question is how to use the Provider design
pattern in your application. Please feel free to post here if I've
misunderstood anything.

The theory of this pattern is that it allows to define a well-documented,
easy-to-understand API, but at the same time give developers complete
control over the internals of what occurs when those APIs are called.
Defined, a provider is simply a contract between an API and the Business
Logic/Data Abstraction Layer. The provider is the implementation of the
API
separate from the API itself. For example, the Membership feature has a
static method called Membership.ValidateUser(). The Membership class
itself
contains no business logic; instead it simply forwards this call to the
configured provider. It is the responsibility of the provider class to
contain the implementation for that method, calling whatever Business
Logic
Layer or Data Access Layer is necessary.

To learn how to use this design pattern, you may read the source code of
built-in ASP.NET 2.0 Membership, Role Management, Site Navigation, Session
State, Profile, Web Events, and Web Part Personalization providers:
http://weblogs.asp.net/scottgu/archive/2006/04/13/Source-Code-for-the-Built_
2D00_in-ASP.NET-2.0-Providers-Now-Available-for-Download.aspx

Or you can learn from how to implement the Provider design pattern in
ASP.NET 1.1:
http://msdn.microsoft.com/asp.net/downloads/providers/default.aspx?pull=/lib
rary/en-us/dnaspnet/html/asp04212004.asp

Hope this helps. Please feel free to post here if anything is unclear.

Sincerely,
Walter Wang (wawang@xxxxxxxxxxxxxxxxxxxx, remove 'online.')
Microsoft Online Community Support

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