How can n-tiers use objectdatasouce to handle error messages sent from the intermediate layer?

Using objectdatasouce, ASP. NET can use the functions in the object andProgramCommunicate
However, some custom errors may occur in the middle layer.
We want to handle these error messages and arrange the messages to be displayed in the label
What should I do?

Assume that you want to process the update of objectdatasource and start the business logic component. This component returns an error message.
In the try... catch object, throw is used to return the message.

 
CatchExAsExceptionThrow
 

 

The next step is to process the event updated in the objectdatasouce1 object.

  protected   sub  objectdatasource1_updated ( byval  sender  as   Object ,  byval  E  as  system. web. UI. webcontrols. objectdatasourcestatuseventargs)  handles  objectperformance1.updated  If   not  (E. exception  is   nothing )  then   mE . lblmessage. TEXT = E. exception. innerexception. message. tostring E. predictionhandled =  true   end   If   end   sub  

In this way, you can handle related error messages by yourself.