c# - How to get selected ID and parentid from Telerik RadDropDownTree -


i need selected items telerik raddropdowntree , create xml document in c#

<telerik:raddropdowntree id="rddt" runat="server" checkboxes="tristate" defaultmessage="select documents" datafieldid="id" datafieldparentid="parentid" datatextfield="name" datavaluefield="id" datasourceid="ds2"> <buttonsettings showcheckall="true" showclear="true" /> <localization checkall="select resources" />                   </telerik:raddropdowntree>

how can id , parentid selected items?

var xdoc = new xdocument(                            new xelement("root",                                   new xelement("resource",                                           rddt.selectedvalue.select(x => new xelement("id", x)),                                           rddt.selectedvalue.select(x=>new xelement("parentid",x)))));

many thanks


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