1. Select a item from radtreeview with databinding
2. right page will show a edit page of the selected item
3. Save the changed value and then left pane tree will update its name

I found that if I dun want to refresh whole page, it is not possible to do the above logic.
My logic is creating a page which handles the selected value and there is a navigate url in each of tree items. When u click on it, right pane will show the edit page. Of course, they are different pages so I cannot update each other from both left or right pane.
Now I think user control (ascx) can help me out here,but how can I change the parameter of the user control and then refresh it?
Please advice, thx.

Best regards,
Stephen

Hi Stephen,

I am not completely sure about your exact scenario and how you update the content - though an ajax request or by client-side code but I believe that the following KB articles will be helpful:

1) Use Ajax request to update part of an external page, loaded in a RadPane - this article has another scenario than yours but the logic can be slightly modified to get what you need by using ajax.

http://www.telerik.com/support/kb/aspnet-ajax/splitter/use-ajax-request-to-update-part-of-an-external-page-loaded-in-a-radpane.aspx

2)Referencing content page in a splitter pane from the parent page and vice versa - this is how you can access the parent and the external page to manipulate them:
 
http://www.telerik.com/support/kb/aspnet-ajax/splitter/referencing-content-page-in-a-splitter-pane-from-the-parent-page-and-vice-versa.aspx


Sincerely yours,
Svetlina
the Telerik team