<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Stan,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’m having the same problem with QuickFix.FIX42.MarketDataIncrementalRefresh.NoMDEntriesGroup<br><br><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Looking over the code now, I think the solution is to either add a whole bunch of implicit conversion operators to the base Group class, or a constructor to each of the derived classes that accepts the base class as a parameter. The constructor route seems safer/easier because you can’t use it out of context unknowingly.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Logan<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> quickfixn-bounces@lists.quickfixn.com [mailto:quickfixn-bounces@lists.quickfixn.com] <b>On Behalf Of </b>S Tan<br><b>Sent:</b> Monday, 9 April 2012 9:30 p.m.<br><b>To:</b> quickfixn@lists.quickfixn.com<br><b>Subject:</b> {{Quickfixn}} Question about GetGroup<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi there,<br><br>At the bottom of <a href="http://quickfixn.org/tutorial/repeating-groups">http://quickfixn.org/tutorial/repeating-groups</a>, we see this code<o:p></o:p></p><div style='margin-left:30.0pt'><p class=MsoNormal><span style='font-family:"Courier New"'>var noSidesGrp = new QuickFix.FIX44.TradeCaptureReport.NoSidesGroup();<br>for(int grpIndex = 1; grpIndex<= message.GetInt(Tags.NoSides); grpIndex += 1)<br>{<br> noSidesGrp = message.GetGroup(grpIndex, Tags.NoSides);<br>}</span><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>This won't compile in VS2010 as noSidesGrp has type QuickFix.FIX44.TradeCaptureReport.NoSidesGroup but message.GetGroup returns the base class Group.<br><br>Is there any way we can call GetGroup and obtain the correct subclass of Group based on the input tags? I've looked into the UnitTests and they mostly test the base class Group.<br><br>I think in QuickFix/C++ we can call message.GetGroup(grpIndex, noSidesGrp) so that GetGroup gets the type information. Perhaps not quite idiomatic C#.<br><br>stan<o:p></o:p></p></div>
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