It is a known issue that items without any children still have the expander arrow visible. This issue is scheduled for fixing and will resolved in our 2009 Q3 release.
With the current binaries what you can do is manually change the template of items that have no children. I prepared a sample project that demonstrates how to do that. Please take a look at it and let me know if you have any questions.
I am using RadControls for WPF Q2 2010 and still experience this issue with an empty (without children) RadPanelBarItem still showing the expander arrow. Do I still need to manually change the template of items with no children or is there an easier way to overcome this problem?
answered on 24 Aug 2010, 08:03 AM
Currently there are two approaches that can be used to remove the expander arrow on RadPanleBarItems that don't contain more items. For more information, you can check this forum post.
However, we are currently working on improving the RadPanelBar control so stay tuned for updates.
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