Question

I have a question about how to properly deal with errors. I am working on a three tiered application. If an error is created on the data tier, I would like to pass the error to the business tier and process it there. What is the best method to accomplish this? I am using .net 2.0 and visual studio 2005.

Thanks for any advice
jason

Answer 1

Use a Try...Catch in your business-layer with your calls to your data-layer within the Try.

Try
  'call data-layer
Catch ex As Exception
  'deal with exception / log
End Try

If you still want to use Try...Catch in your data-layer then you need to Throw (to preserve stacktrace) or Throw ex within the Catch, otherwise don’t use Try...Catch in your data-layer at all.

Try
  data = dataLayer.GetData()
Catch ex As Exception
  Throw
End Try