KeyAttribute Class

Applied to properties of non-persistent classes. Specifies that a target property is a key property.

Namespace: DevExpress.ExpressApp.Data

Assembly: DevExpress.ExpressApp.v24.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
public class KeyAttribute :
    Attribute

VB.NET

<AttributeUsage(AttributeTargets.Property Or AttributeTargets.Field, AllowMultiple:=False, Inherited:=True)>
Public Class KeyAttribute
    Inherits Attribute

Remarks

A Key property is required if you are going to access a non-persistent object by a key using the NonPersistentObjectSpace.ObjectByKeyGetting event. An example of using this event together with the KeyAttribute attribute is provided in the How to: Display a Non-Persistent Object’s Detail View from the Navigation topic.

Inheritance

Object

Attribute

KeyAttribute