Hi Eitan,
We do not have a CheckedNodes collection in the current implementation of the TreeViewAdv control. However, we have considered this as a feature request and have logged a QA report# 777 in this regard. We will try our very best to implement this feature at the earliest.
For now you could use the workaround in this
test sample attached here to get the collection of checked nodes.
We appreciate your interest in Syncfusion products.
Regards,
Guru Patwal
Syncfusion, Inc.