or
<telerik:RadGrid AutoGenerateColumns="false" ID="RadGrid1" OnNeedDataSource="NeedDataSourceClient">
<MasterTableView AllowFilteringByColumn="True" AutoGenerateColumns="false">
<telerik:GridTemplateColumn DataField=country_Id" UniqueName="country_Id SortExpression=country_Id AutoPostBackOnFilter="true">
<FilterTemplate>
<telerik:RadComboBox ID="rcbCountries" runat="server"> </telerik:RadComboBox>
<FilterTemplate>
<ItemTemplate><%# global.GetCountry(DataBinder.Eval(Container, "DataItem.country_Id))%>
</ItemTemplate>
</telerik:GridTemplateColumn>
</MasterTableView>
</telerik:RadGrid>

<telerik:RadSplitter ID="RadSplitter" runat="server" Height="100%" Width="100%" OnClientLoad="SplitterLoad"VisibleDuringInit="false"><telerik:RadPane ID="RadLeftMenuPane" runat="server" Width="22px" BackColor="#efefef"
scrolling="None"> <telerik:RadSlidingZone ID="RadLeftMenuSlide" runat="server" Width="22" ClickToOpen="true" BackColor="#0b497b" SlideDirection="right"> <telerik:RadSlidingPane ID="RadCommonLeftMenu" runat="server" Title="Menu" Width="200px"> <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server"> </asp:ContentPlaceHolder> </telerik:RadSlidingPane> <telerik:RadSlidingPane ID="RadReferencesMenu" runat="server" Title="References" Width="200px" Visible="false" Font-Size="12px" UndockText="true" ResizeText="true"> <asp:ContentPlaceHolder ID="ContentPlaceHolder3" runat="server"> </asp:ContentPlaceHolder> </telerik:RadSlidingPane> </telerik:RadSlidingZone> </telerik:RadPane> <telerik:RadPane ID="RadMiddlePane1" runat="server" Scrolling="None" Width="100%" Height="100%"> <telerik:RadSplitter ID="Radsplitter2" runat="server" Orientation="Horizontal" VisibleDuringInit="false"> <telerik:RadPane ID="Radpane2" runat="server"> <div id="pagecontent" class="PageContent" style="height: 100%"> <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server"> </asp:ContentPlaceHolder> </div> </telerik:RadPane> </telerik:RadSplitter> </telerik:RadPane> </telerik:RadSplitter>