The ASPxCardView control can function only in bound mode. Otherwise, it will not display any data. ASPxCardView can be bound to any standard data source type including: SqlDataSource, ObjectDataSource, XmlDataSource, AccessDataSource, and SiteMapDataSource.
ASPxCardView also supports Database Server Mode - a data binding mode that is specifically designed to work with large data levels: more than 50,000 records. Data is loaded in small portions, and data-aware operations are performed on server-side to provide quick access to data, even if the sorting and filtering features are used.