how di programitaccly acces the DataSource property of a RadComboBox that is in the Filtertemplate of a GridDropdownColumn of my grid
I want to set the datasource in code behind at the server side

							<telerik:GridDropDownColumn DataField="ProductVolumeID" DataSourceID="ProductVolumeDataSource"
									HeaderText="Product Volume" ListTextField="LongDesc" ListValueField="ProductVolumeID"
									UniqueName="ProductVolumeID">
									<FilterTemplate>
											<telerik:RadComboBox ID="ProductVolumeComboBox" DataSourceID="ProductVolumeDataSource" DataTextField="LongDesc"
													DataValueField="ProductVolumeID" AppendDataBoundItems="true" SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("ProductVolumeID").CurrentFilterValue %>'
													runat="server" OnClientSelectedIndexChanged="ProductVolumeIndexChanged">
													<Items>
															<telerik:RadComboBoxItem Text="All" />
													</Items>
											</telerik:RadComboBox>
											<telerik:RadScriptBlock ID="ProductVolumeIndexChangedRadScriptBlock" runat="server">
													<script type="text/javascript">
                        		function ProductVolumeIndexChanged(sender, args) {
															var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>");
															tableView.filter("ProductVolumeID", args.get_item().get_value(), "StartsWith");
														}
													</script>
											</telerik:RadScriptBlock>
									</FilterTemplate>
							</telerik:GridDropDownColumn>
How do i programitaccly access the DataSource property of a RadComboBox that is in the FilterTemplate of a GridDropDownColumn 
I want to set the datasource in the server side code and not use the DataSourceID 
  
                            <telerik:GridDropDownColumn DataField="ProductVolumeID" DataSourceID="ProductVolumeDataSource"
                                    HeaderText="Product Volume" ListTextField="LongDesc" ListValueField="ProductVolumeID"
                                    UniqueName="ProductVolumeID"> 
                                    <FilterTemplate> 
                                            <telerik:RadComboBox ID="ProductVolumeComboBox" DataSourceID="ProductVolumeDataSource" DataTextField="LongDesc"
                                                    DataValueField="ProductVolumeID" AppendDataBoundItems="true" SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("ProductVolumeID").CurrentFilterValue %>' 
                                                    runat="server" OnClientSelectedIndexChanged="ProductVolumeIndexChanged"> 
                                                    <Items> 
                                                            <telerik:RadComboBoxItem Text="All" /> 
                                                    </Items> 
                                            </telerik:RadComboBox> 
                                            <telerik:RadScriptBlock ID="ProductVolumeIndexChangedRadScriptBlock" runat="server"> 
                                                    <script type="text/javascript"> 
                                function ProductVolumeIndexChanged(sender, args) { 
                                                            var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>"); 
                                                            tableView.filter("ProductVolumeID", args.get_item().get_value(), "StartsWith"); 
                                                        } 
                                                    </script> 
                                            </telerik:RadScriptBlock> 
                                    </FilterTemplate> 
                            </telerik:GridDropDownColumn> 

can someone tell me how to do this same thing but, make it for a DATE CONTROL??
and of course not a StartsWith but an Equals

RadFilterStartsWithFilterExpression expr1 = new RadFilterStartsWithFilterExpression("LOGDISPLAY");

expr1.Value =

"";

UnreportedItemsRadFilter.RootGroup.AddExpression(expr1);

UnreportedItemsRadFilter.RecreateControl();