XPClassInfo.NullableBehavior Property

Determines if nullable columns should be created when updating the database schema for the persistent class described by the current XPClassInfo object.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public NullableBehavior NullableBehavior { get; }

VB.NET

Public ReadOnly Property NullableBehavior As NullableBehavior

Property Value

Type	Description
NullableBehavior	A NullableBehavior enumeration value specifying if a nullable column should be created when updating the database schema.

Available values:

Name	Description
Default	The default mode. Has the same effect as AlwaysAllowNulls.
AlwaysAllowNulls	A nullable column is always created.
ByUnderlyingType	A nullable column is created when the mapped property type is not a value type.

Remarks

To change the NullableBehavior value, apply the NullableBehaviorAttribute in the persistent class declaration. You can also change this setting globally, using the static XpoDefault.NullableBehavior property. To change behavior for an individual field, use the NullableAttribute attribute.