IModelCommonMemberViewItem.DataSourcePropertyIsNullMode Property

Specifies objects displayed in the current Lookup Property Editor, when the IModelMemberViewItem.DataSourceProperty property is null (Nothing in VB).

Namespace: DevExpress.ExpressApp.Model

Assembly: DevExpress.ExpressApp.v24.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

DataSourcePropertyIsNullMode DataSourcePropertyIsNullMode { get; set; }

VB.NET

Property DataSourcePropertyIsNullMode As DataSourcePropertyIsNullMode

Property Value

Type	Description
DataSourcePropertyIsNullMode	A DataSourcePropertyIsNullMode enumeration value specifying objects displayed in the current Lookup Property Editor, when the DataSourceProperty property is null.

Available values:

Name	Description
SelectNothing	Specifies that the property’s Lookup List View is bound to an empty collection.
SelectAll	Specifies that the property’s Lookup List View is bound to a collection of all existing persistent objects of the property’s type.
CustomCriteria	Specifies that the Lookup List View is bound to a collection containing the objects that satisfy the criteria. The criteria should be specified by the DataSourcePropertyAttribute.DataSourcePropertyIsNullCriteria parameter of the DataSourcePropertyAttribute.

Remarks

This property is considered when the DataSourcePropertyAttribute is applied to the current Property Editor.