DevExpress XAF — Filtering (XPO Sub-Skill)

This sub-skill extends devexpress-xaf-filtering with XPO-specific filtering patterns. The base skill covers CriteriaOperator syntax, IObjectSpace methods, and XAF filtering infrastructure — this skill covers the XPO layer underneath.

When to Use This Skill

Use this skill (in addition to the base skill) when:

• The XAF project uses XPO as its ORM
• You need to filter XPCollection<T> with CriteriaOperator
• You need XPQuery<T> (LINQ to XPO) for type-safe queries
• You need XPView for lightweight read-only projections
• You need to build criteria programmatically using BinaryOperator, GroupOperator, FunctionOperator
• You need server-mode data sources with filtering
• You need Session.FindObject or Session.GetObjects

Prerequisites & Installation

XPO filtering uses the same core criteria classes as the base filtering skill, plus XPO-specific collection and session APIs.