[Quickfix-developers] Getting Fields From Headers

[Mike L. <Mik...@tr...>]

I'm using QuickFix 1.11 with a C# app and I have a couple of questions
concerning Message Class, Header Class and getField() and getHeader().

I have a method in C# that accepts two messages, a QuickFix4.0.Message
and
a QuickFix42.Message.  What I am trying to do is normalize all my
incoming
fix messages to conform to an internal version of 4.2.  I created a
generic method to copy the header and trailer from the 4.0 msg to the
4.2
msg and I am having a world of problems.  Is this possible to do or do I
have to do it at the specific message level (ie: NewOrder, Cancel, etc)?

I've noticed that the only way I can retrieve the fields stated without
it
throwing a FieldNotFound Exception are to use differenct combinations of
getheader and getfield.  Otherwise if I try to use getField on specific
header fields then beginstring, bodylength, and msgtype all throw the
FieldNotFound Exception, if I try to use getHeader().GetField() on
specific header fields then sendercompid and targetcompid throw the
exception.

I've also tried to pull the header out:

QuickFix40.Header originalHeader =3D
(QuickFix40.Header)OriginalMessage.getHeader();
                        QuickFix42.Header newHeader =3D
(QuickFix42.Header)NewMessage.getHeader();


Compiles fine but give me a InvalidCastException: Specified cast is not
valid.  How can I pull these out generically without having to repeat
code
at the specific message method level?  Thanks!

Mike Lee


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