or
RadDatePicker minValDate = new RadDatePicker(); minValDate.SelectedDate = new System.DateTime();<telerik:RadTreeView ID="RadTreeView1" runat="server" > <DataBindings> <telerik:RadTreeNodeBinding Depth="0" Expanded="true" /> </DataBindings> </telerik:RadTreeViewvar nData = from p in db.PeforrmanceDatas where p.PerformanceGroup.FundFamilyID == Int32.Parse(Request.QueryString["ffid"]) select new { p.PerformanceGroup.PerformanceGroupName, p.Class, p.ClassID }; RadTreeView1.DataTextField = "Class"; RadTreeView1.DataFieldID="ClassID"; RadTreeView1.DataFieldParentID = "PerformanceGroupName"; RadTreeView1.DataSource = nData; RadTreeView1.DataBind();