Why won't binding to a child object property with rdlc Report work in vs2010?

Question

A while ago someone asked how to bind to a child object's property in a rdlc report. Question here.

The solution was to use an expression like this:

=Fields!ChildObject.Value.SomeProperty

I have recently tried to upgrade to version 10 of the reporting libraries (Microsoft.ReportViewer.WebForms and Microsoft.ReportViewer.Common) and for some reason this does not work anymore. I have got the report rendering and displaying all data fine except any which uses this technique. Instead of the property value i get the text: "#Error"

Why doesn't this work anymore? Anybody know how to to this in the new version?

Answer 1

See question: http://stackoverflow.com/questions/2551969/child-objects-in-rdlc-studio-2010rc

And related bug report at: https://connect.microsoft.com/VisualStudio/feedback/details/553592/accessing-nested-objects-in-data-source-of-local-report-does-not-function

Found another link regarding this: http://social.msdn.microsoft.com/Forums/en-US/vsreportcontrols/thread/16bdd594-7056-4796-8d83-39910dab1651