DataTemplateSelector (and other *Selector) no longer DependencyObject?

[gk]

in Q3 2011 Beta, Telerik.Windows.Controls.DataTemplateSelector (and other *Selectors) no longer inherit DependencyObject (System.Windows)?
I noticed this in in the internal builds after Q2 2011.9.20 too, they now just inherit Object.

Is this an oversight or intended?
Thanks, GK

[Valeri Hristov]

Hi Gk,

This change is intended because the DependencyObject base class lead to problems that have no other workarounds. I can provide more information if you are interested...

Greetings,
Valeri Hristov
the Telerik team

[Brian Sayatovic]

I just tried upgrading and got bit by this same problem.  Can I have the same details?  Do you have any suggested work-arounds?

[Valeri Hristov]

When we made the *Selector clases DO we started receiving XAML parser exceptions in our themes. It is possible to reproduce the problem in a very simple application with no Telerik control inside, which made us think that it is caused by a bug in the Silverlight runtime. We were unable to find a workaround, hence we had to revert to simple objects. In addition, the WPF *Selector classes are plain objects, hence the code in the two platforms would have been different, which something we want to avoid.

Kind regards,
Valeri Hristov
the Telerik team

[Eugene]

We used to use dependency properties in the selector to give the selector extra context. Is there a way we can continue with using dependency properties in the selector?

[Miroslav Nedyalkov]

Hello Eugene,

As the StyleSelector doesn't inherit from the DependencyObject class it cannot have any DependencyProperties and you can add only simple CLR properties to it. Sorry for the inconvenience caused.

Regards,
Miroslav Nedyalkov
the Telerik team