Hello,
I'd like to persist the selected Items on client side. I've found an article that describes the solution for RadGrids: http://www.telerik.com/help/aspnet-ajax/grid-persist-selected-rows-client-sorting-paging-grouping-filtering.html .
I tried to apply this solution for RadTreeList. I've replaced the OnRowCreated, OnRowSelected, OnRowDeselected, OnGridCreated event handlers with OnItemCreated, OnItemSelected, OnItemDeselected, OnTreeListCreated event handlers. When the grid is created the OnItemCreated even handler fires and the connected javascript is invoked. When this script invokes the args.get_item().set_selected(true); method I receive a javascript error message the tells me that the this._owner._selectedItems is null. After debugging the script I found that the _owner is null. I thought when this event handler is fired all properties of the item has been set. It seems that I was wrong.
Could you tell me how I can change the selection of a item when the page is loaded or the node is expanded or the control is paginated?