AssociationAttribute Class
Identifies the end of an association that is involved in an object relationship.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v19.1.dll
Declaration
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, Inherited = true)]
public sealed class AssociationAttribute :
Attribute
<AttributeUsage(AttributeTargets.Property Or AttributeTargets.Field, Inherited:=True)>
Public NotInheritable Class AssociationAttribute
Inherits Attribute
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, Inherited = true)]
public sealed class AssociationAttribute :
Attribute
<AttributeUsage(AttributeTargets.Field Or AttributeTargets.Property, Inherited:=True)>
Public NotInheritable Class AssociationAttribute
Inherits Attribute
Apply this attribute to both properties at the ends of the association, specifying an object relationship.
Example
In the following sample code, the Location class might contain several Departments and each Department can in turn span several Locations.
using DevExpress.Xpo;
// ...
public class Location : XPObject {
public string Name;
[Association("Locations-Departments")]
public XPCollection<Department> Departments {
get { return GetCollection<Department>("Departments"); }
}
}
public class Department : XPObject {
public string Name;
[Association("Locations-Departments")]
public XPCollection<Location> Locations {
get { return GetCollection<Location>("Locations"); }
}
}
Imports DevExpress.Xpo
' ...
Public Class Location
Inherits XPObject
Public Name As String
<Association("Locations-Departments")> _
Public ReadOnly Property Departments() As XPCollection(Of Department)
Get
Return GetCollection(Of Department)("Departments")
End Get
End Property
End Class
Public Class Department
Inherits XPObject
Public Name As String
<Association("Locations-Departments")> _
Public ReadOnly Property Locations() As XPCollection(Of Location)
Get
Return GetCollection(Of Location)("Locations")
End Get
End Property
End Class
See Also