Richard ONeil wrote:
> You could try something like:
>
> try
> database.open();
> except
> on e: exception do
> if e is edbengineerror then
> begin
> raise edatabaseerror.create('omg....something just happened!!');
> end;
> end;
Sorry, that's a terrible example of catching exceptions, for two reasons:
1. If the code in the "try" section raises anything other than an
EDBEngineError, it will be caught and ignored. You'll never know about
it at run time. Never catch an exception that you don't know how to handle.
except
on E: EDBEngineError do begin
// ...
end;
end;
2. It hides the original exception by raising a new, less specific
exception with a meaningless error message. It also throws away the
database error code. I'm not sure, but it might also clobber whatever
stack trace might have been available from a debugging library like
JclDebug.
--
Rob
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