I'm having a problem with the RadPropertyGrid when bound to an indexed property. Getting the property works fine, but after changing the field, the setter never gets called.

 Attached is a simple test program. This program has a RadPropertyGrid bound to a simple string property and an indexed property. These same two properties are also bound to a TextBox.

 Notice that when the values in the TextBoxes are changed, the debug output shows that the setters are called and the values displayed in the RadPropertyGrid are properly updated.

 When the simple string is changed in the RadPropertyGrid, the debug output shows that the setter is called and the value displayed in the TextBox is properly updated.

 But, when the indexed property is changed in the RadPropertyGrid, the debug output does not show the setter getting called and the value displayed in the TextBox does not get updated.

*** The support for collection indexer binding will be available with R2 2016.

The problem should be resolved with R2 2016. 

The fix will be available with lib version 2016.1.328

The reason for the flickering is the group needs to be recreated so that its content to be updated.

I understand from http://docs.telerik.com/devtools/wpf/controls/radpropertygrid/features/validation, that there are essentially two methods to implement data validation in a RadPropertyGrid.  Note that I would like to use the "property set" feature of RadPropertyGrid whereby I can display/edit properties from multiple items simultaneously (http://docs.telerik.com/devtools/wpf/controls/radpropertygrid/features/defining-propertysets).

I was only able to get the second validation technique (data annotations) to work when using property sets.  Should the first technique (IDataErrorInfo) work with the property sets feature?  Towards the end of the discussion here http://www.telerik.com/forums/validation-bfd78b274562, this topic is touched on, but it is not clear if it was ever resolved.

If it is not possible to use the IDataErrorInfo technique with property sets, I suggest the documentation at http://docs.telerik.com/devtools/wpf/controls/radpropertygrid/features/validation be updated to reflect this fact.  Separately, is there a target date for when this feature may be added?

If it is possible to use the IDataErrorInfo technique with property sets, would someone kindly post a sample solution?

The fix is available with lib version 2015.2.907.

Fixed with LIB version 2015.2.817.

Should be resolved with lib version 2014.3.1124.

This feature will be available with Q3 2014. User can specify the criteria used for filtering. All he/she needs to do is to override IsFiltered property of PropertyDefinition and set the his/her logic there.

SearchTextBox is clipped, when SortAndGroupButtonsVisibility property of RadPropertyGrid is set to Collapsed, in Windows8Touch theme

Provide support for Editor Attribute.

BindingMode is OneWay when there is editor template and PropertySetMode is None

Resolved with LIB version 2014.1.407.