when using open access entities with wcf endpoints service how do I pass the value from the selected row to the object datasource for load on demand of the detail table, it is not the entityid it is a secondary id I am trying to pass, the one supporting the parent/child relationship of the master/detail tables. I think I have to use the search with searchparameters but I do not know the syntax to pass in the search parameters. Acutal Code snips are appreciated.