I'm trying to create a custom Filter attribute since I can't use the Filter object on a custom attribute. When I was using the Filter attribute itself, things were working until I tried to save something to the database, and then it failed. So the filter itself is working, but I can't get the preview list to work with my custom string RoleFilter. I've tried this way and I've tried with a button object, but neither will show up on the screen. I click the button and it thinks, but then nothing appears. What do I need to change to make the filtered list appear? <my:Control my:Name="FilterBuilder" my:TypeName="UocFilterBuilder" my:ExpandArea="true" my:RightsLevel="{Binding Source=rights, Path=RoleFilter}"> <my:Properties> <my:Property my:Name="Value" my:Value="{Binding Source=object, Path=RoleFilter, Mode=TwoWay}"/> <my:Property my:Name="PreviewButtonCaption" my:Value="%SYMBOL_ViewMembers_END%"/> <my:Property my:Name="ExcludeGroupMembership" my:Value="true"/> </my:Properties> <my:Events> <my:Event my:Name="PreviewClicked" my:Handler="OnClickPreview"/> </my:Events> </my:Control> <my:Control my:Name="CalculatedMember" my:TypeName="UocListView" my:ExpandArea="true" my:RightsLevel="{Binding Source=rights, Path=RoleFilter}"> <my:Properties> <my:Property my:Name="ColumnsToDisplay" my:Value="DisplayName,ObjectType,Description"/> <my:Property my:Name="EmptyResultText" my:Value="%SYMBOL_CalculatedMemberEmptyResultText_END%"/> <my:Property my:Name="PageSize" my:Value="10"/> <my:Property my:Name="ShowTitleBar" my:Value="false"/> <my:Property my:Name="ShowActionBar" my:Value="false"/> <my:Property my:Name="ShowPreview" my:Value="false"/> <my:Property my:Name="ShowSearchControl" my:Value="false"/> <my:Property my:Name="EnableSelection" my:Value="false"/> <my:Property my:Name="SingleSelection" my:Value="false"/> <my:Property my:Name="ItemClickBehavior" my:Value="ModelessDialog"/> <my:Property my:Name="ReadOnly" my:Value="true"/> <my:Property my:Name="ListFilter" my:Value="{Binding Source=object, Path=RoleFilter}" /> </my:Properties> </my:Control>