DevExpress XAF — Filtering

This skill covers all data filtering techniques in XAF applications. EF Core is the recommended ORM; all examples default to EF Core patterns unless stated otherwise. XPO is also supported.

Composite skill: If the target project uses XPO, also load the devexpress-xaf-filtering-xpo skill for XPCollection criteria, XPQuery<T>, and XPO-specific operator classes.

Prerequisites & Installation

Filtering is part of the core XAF framework — no additional module registration is required.

NuGet Packages

Package	Purpose
`DevExpress.Data`	`CriteriaOperator`, `BinaryOperator`, `GroupOperator`, `FunctionOperator`, and all criteria classes (`DevExpress.Data.Filtering` namespace)
`DevExpress.ExpressApp`	`IObjectSpace` filtering methods, `CollectionSource.Criteria`, `FilterController`, `SetFilterAction`, `ListViewFilterAttribute`
`DevExpress.ExpressApp.Filtering`	`SearchClassOptionsAttribute`, `SearchMemberOptionsAttribute` — Full Text Search configuration
`DevExpress.Persistent.Base`	`DataSourcePropertyAttribute`, `DataSourceCriteriaAttribute` — lookup filtering