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Circular dependency with DAL and BLL.

Posted on 2009-05-06
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Last Modified: 2012-06-27
I am getting errors in the BLL and DAL since they both depend on each other.
Error      3      The type or namespace name 'BLL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.DAL\DAL\Tickets\TicketData.cs      9      25      KORE.SIDWebClient.DAL
Error      4      The type or namespace name 'Ticket' could not be found (are you missing a using directive or an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.DAL\DAL\Tickets\TicketData.cs      38      54      KORE.SIDWebClient.DAL
Error      5      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Company\Company.cs      4      25      KORE.SIDWebClient.BLL
Error      6      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Tickets\TicketLogic.cs      5      25      KORE.SIDWebClient.BLL
Error      7      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketPriority.cs      6      25      KORE.SIDWebClient.BLL
Error      8      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketAssignedTo.cs      6      25      KORE.SIDWebClient.BLL
Error      9      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupPriorityLevel.cs      6      25      KORE.SIDWebClient.BLL
Error      10      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketContactMethod.cs      6      25      KORE.SIDWebClient.BLL
Error      11      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketRequestType.cs      6      25      KORE.SIDWebClient.BLL
Error      12      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketServiceImpact.cs      6      25      KORE.SIDWebClient.BLL
Error      13      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupTypeTicket.cs      6      25      KORE.SIDWebClient.BLL
Error      14      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketStatus.cs      6      25      KORE.SIDWebClient.BLL
Error      15      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketAgentFollowup.cs      6      25      KORE.SIDWebClient.BLL
Error      16      The type or namespace name 'DAL' does not exist in the namespace 'KORE.SIDWebClient' (are you missing an assembly reference?)      C:\svn\SIDWEBMYBRANCH\code\KORE.SIDWebClient.BLL\BLL\Lookup\LookupFieldTicketLocationSIMs.cs      6      25      KORE.SIDWebClient.BLL

What do I do?
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Question by:mathieu_cupryk
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by:ViceroyFizzlebottom
ID: 24319425
The easy answer would be to refactor your code to comply with the Isolation of Concerns principle; more specifically to remove any BLL dependencies from your DAL.

In any event though, make sure your references are still good in both projects by ensuring there are no exclamation point icons when you expand your References folder. If the references don't exist (or they are broken as indicated by the exclamation point.)

Another quick way to check is to add a 'using' statement at the top of each .cs file and see if your namespace(s) show up in the context dialog.
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ViceroyFizzlebottom earned 500 total points
ID: 24319446
Whoops, the second paragraph should have continued...

then you should be able to simply re-add the references.
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Author Comment

by:mathieu_cupryk
ID: 24320191
I am still not convince what happens if we make a common layer instead of have two assemblies.
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