I have to implement search criteria in episerver. The existing search criteria includes pagetype filter which provides me the search result for the pagetype irrespective of where they are. I need to include another criteria of a parent page which is of type pagereference which basically will filter the pages and return records only which are part of the parent page. kindly advice.
Well first if you have the parent page they why not use the ContentLoader instead of a search? Like this:
var loader = EPiServer.ServiceLocation.ServiceLocator.Current.GetInstance<IContentLoader>();
var children = loader.GetChildren<%pageTypeHere%>(%parent pagereference%);
But if you wish to go with the search option:
query = query.Filter(x => x.Ancestors().Match(%parent pagereference id (so a int)%));