Thanks for writing.
Indeed, RadSlideView does not optimally handle the collection changes. This is because we initially planned the control to be used to display static collections.
Since as of now it already supports the Pull-to-Refresh experience and there is demand for more complicated data scenarios, it is on our plans to upgrade it accordingly. In our latest Q2 2013 SP1 release we introduced a new and improved UI virtualization mechanism. We will put your requirement on our TODO list and will make sure to optimize the mechanism that handles source collection changes as well.
Is it alright for you to workaround this behavior by explicitly setting the SelectedItem
to the desired one after modifying the source collection?
Please excuse us for any inconvenience caused.
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