Re: [Quickfix-developers] How do I change the field of a message from the .net api?

[Andrei G. <an...@gm...>]

On Fri, Jan 9, 2009 at 1:54 AM, Wilhelm Thomas <th...@cu...> wrote:
> QuickFIX Documentation: http://www.quickfixengine.org/quickfix/doc/html/index.html
> QuickFIX Support: http://www.quickfixengine.org/services.html
>
>
> hello
>
> Happy new year to all!
>
> I'm using the .net api
>
> I'm working on a gateway, I receive a message from my acceptor function
>
> fromApp(
>
> Message message, SessionID sessionID)
>
> 1) I basically need to change some fields from this message and forward back the message to my Initiator
>
> I'm basically doing this:
>
>
> message.removeField((int)49);
> message.removeField(56);
> Console.Out.WriteLine(">>>> m=" + message.ToString());
> message.setField(49, "MAXP2"); // SenderCompID
> message.setField(56, "MAX2PRICE"); // TargetCompID
> Console.Out.WriteLine(">>>> m=" + message.ToString());
> message.setString(49, "MAXP2"); // SenderCompID
> message.setString(56, "MAX2PRICE"); // TargetCompID
> Console.Out.WriteLine(">>>> m=" + message.ToString());
>
>
> but when I call some ,remove, replace, setField, setString, nothing change the > fields 49 and 56?

You are setting header fields into the body. This is a no-no. The
correct way to do it would be:

message.getHeader().setString(49, "MAXP2"); // SenderCompID
message.getHeader().setString(56, "MAX2PRICE"); // TargetCompID

Anyway, keep in mind that if you want to send this message via
QuickFIX (i.e. SendToTarget), MAXP2-MAX2PRICE must be a valid session
defined in your coniguration file.

>
> 2) I also try to loop over the fields and create a new message but I do not get the correct field
>
> System.Collections.
>
> IEnumerator enum_ = message.GetEnumerator();
> QuickFix.Field key = null;
> while(enum_.MoveNext()){
>   key = (Field)enum_.Current;
>   message2.setField(key.getField(), (string)key.getObject());
> }
>
> Here is what I see once this while execute:
>
> +  message {8=FIX.4.2 9=225 35=V 34=2 49=BLABLA 52=20090109-03:49:01.464 56=GATEWAY146=1 55=6E Sep08 48=6E012008090000003232 167=FUT 200=200809 202=0 207=TTSIM 262=1/8/2009 7:49:01 PM172 263=1 264=10 265=1 266=Y 267=3 269=0 269=1 269=2 10=192 } QuickFix.Message {QuickFix42.MarketDataRequest}
>
> +  message2 {8=FIX.4.2 9=69 35=V 146=1 262=1/8/2009 7:49:01 PM172 263=1 264=10 265=1 266=Y 267=3 10=251 } QuickFix42.MarketDataRequest
>
> Which is weird as message2 isn't at all like message?
>
> Any idea why?

1) You are not iterating over header/trailer fields.
2) You won't get fields in repeating group, as they are kept in
separate structures.