About the first post:
- I think I have answered this one somewhere else, but just in case I will answer it here, too:
- About unchecking all nodes - there is a function of RadTreeView's client-side object representation uncheckAllNodes, which you can use;
- About the checkability of the nodes - there is a property of the RadTreeNode - Checkable which you should set to false (server-side) if you don't want the node to be rendered with a checkbox on the side.
About the node highlighting:
- You can use this kb article as an example of even more complex type of highlighting (just part of the node's text): http://www.telerik.com/support/kb/aspnet-ajax/treeview/how-to-manage-search-select-all-and-deselect-all-functionality-for-radtreeview-in-radcombobox.aspx
the Telerik team