Hi Faleh,
Thank you for posting query to us.
Please refer the following location in the online documentation that shows how client object id can be used to access the control's object model on the client side in TreeView control.
http://www2.syncfusion.com/ug_61/toolsweb/ClientObjectIDAndValueProperties.htmlIf you want to know client side events in TreeView Control please refer the following location in the online documentation.
TreeView package->Treeview->Events->Client side Events
For general information regarding the TreeView control please refer the following link:
http://www2.syncfusion.com/ug_61/toolsweb/Tutorial5.htmlKindly try this and please let us know if this helps.
Regards,
Jisha