XPDictionary.NullableBehavior Property

Specifies if nullable columns should be created when updating the database schema.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v18.2.dll

Declaration

C#

public NullableBehavior NullableBehavior { get; set; }

VB.NET

Public 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

The default NullableBehavior value is taken from the static XpoDefault.NullableBehavior property value.

The NullableBehavior value can be overridden for an individual persistent class of field using the:

• NullableAttribute attribute;
• NullableBehaviorAttribute attribute;
• XPClassInfo.NullableBehavior property.