Question

Consider this part of code:

Try
  arqTXT.LoadFromFile(LogPath);
finally
  ShowMessage(" The log file could not be found. Check if the service is running. ");
end;

After my message, a system message appears with the message: Cannot open file “C:\log.txt”. Is there a way to not show this system message?

I’m using Delphi 2010

Thanks.

Answer 1

You would like to trap that specific exception (EInOutError if I remember correctly) and let other exceptions that occurred to remain unmuted. So if you get some other exception (e.g. EOutOfMemory) if wont get “swallowed” leaving you with seemingly working but broken code.

try
  ..
except
  on E: EInOutError do
        begin
          ..
        end;
end;

You can have many exceptions handlers in one construct. Any unhandled exceptions will continue to propagate outside of the try .. except block, until caught elsewhere (e.g. by default exception handler that shows the error box).