Question

Is it better to access data from within the web parent app and pass the necessary data to the control and back via properties, or pass a reference or url pointer (of webservice) to control and let it access the data for the fields it encompasses keeping in mind that the parent doesn t need to use the data anywhere else that the server control uses.

Answer 1

I think that usually it would be easier to manage the control by the app, but in some scenarios especially when you don t need the application to access the data you can just embed the control, e.g. when you want to embed an external video player etc. or some external web-part or other frame.

Answer 2

The idea is you don t want the UI interacting with the db layer. So you abstract that data by creating a datalayer (basically a class which you can compile down to an assembly / dll). Your UI talks to the BLL which in turn talks to the DAL.

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