or
<telerik:GridButtonColumn Text=">" CommandName="Select"> <HeaderStyle Width="10px" /> <ItemStyle Width="10px" /></telerik:GridButtonColumn>
<telerik:RadButton ID="optOrgPosting" ClientIDMode="AutoID" runat="server" GroupName="PostingType" ToggleType="Radio" OnClientClicked="onPostingTypeChanged" Text="I am posting for my nonprofit organization/public school/university." AutoPostBack="False" ButtonType="ToggleButton" Skin="Silk"></telerik:RadButton><br /><telerik:RadButton ID="optSFPosting" ClientIDMode="AutoID" runat="server" GroupName="PostingType" ToggleType="Radio" OnClientClicked="onPostingTypeChanged" Text="I am a search firm, advertising firm, consultant or other company posting on behalf of a nonprofit organization." AutoPostBack="False" ButtonType="ToggleButton" Skin="Silk"></telerik:RadButton><asp:EntityDataSource ID="dsTasks" runat="server" ConnectionString="xxx" DefaultContainerName="xxx" EnableFlattening="False" EntitySetName="Tasks" EntityTypeFilter="Task" Include="Type"></asp:EntityDataSource><asp:EntityDataSource ID="dsType" runat="server" ConnectionString="xxx" DefaultContainerName="xxx" EnableFlattening="False" EntitySetName="Types" EntityTypeFilter="Type"><telerik:GridTemplateColumn DataField="TypeId" HeaderText="Type" SortExpression="Type.Name" UniqueName="TypeId"> <ItemTemplate> <asp:Label ID="lbl" runat="server" Text='<%# Eval("Type.Name") %>'></asp:Label> </ItemTemplate> <FilterTemplate> <telerik:RadComboBox ID="cmb" DataSourceID="dsType" DataTextField="Name" DataValueField="Id" Height="200px" SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("TypeId").CurrentFilterValue %>' runat="server" OnClientSelectedIndexChanged="TypeIdIndexChanged"> </telerik:RadComboBox> <telerik:RadScriptBlock ID="rsb" runat="server"> <script type="text/javascript"> function TypeIdIndexChanged(sender, args) { var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>"); tableView.filter("TypeId", args.get_item().get_value(), "EqualTo"); } </script> </telerik:RadScriptBlock> </FilterTemplate> </telerik:GridTemplateColumn>