TFS Gotcha (Exception Handling)

When coding against team foundation server you must be aware that some of the exceptions thrown by Team Foundation Server are not Serilisable! I think that this was an oversite by Microsoft, but it is there none the less.

An example of this is; TeamFoundationServerUnauthorizedException

If you want to handle this exception accross Windows Communication Foundation  you will need to create a custom exception of the same name and re-throw this accross your services.

<DataContract()> _
Public Class TeamFoundationServerUnauthorizedException

Public Sub New()
    …
  End Sub

End Class

Make sure that you mark it as a data contract and then you can throw it when you encounter the Team Foundation Server exception:

Try
  ’ Team Foundation Server Connection Code
Catch ex As TeamFoundationServerUnauthorizedException
  Throw New FaultException(Of FaultContracts.TeamFoundationServerUnauthorizedException)(New FaultContracts.TeamFoundationServerUnauthorizedException())
Catch ex As System.Exception
  Throw New FaultException(Of System.Exception)(ex, “Failed to do team server thing”, New FaultCode(" Team Foundation Server :EH:S:0001"))
End Try

This will allow you to handle Team Foundation Server exceptions for your Windows Communication Foundation service application on the client.

Technorati Tags: ALM   TFS