Skip to main content
.NET Standard 2.0+

DataSourcePropertyIsNullMode Enum

Specifies the mode used to populate the data source for a List View displayed in a Lookup Property Editor or List View invoked by the LinkUnlinkController.LinkAction Action in a popup window.

Namespace: DevExpress.Persistent.Base

Assembly: DevExpress.ExpressApp.v22.1.dll


public enum DataSourcePropertyIsNullMode


Name Description

Specifies that the property’s Lookup List View is bound to an empty collection.


Specifies that the property’s Lookup List View is bound to a collection of all existing persistent objects of the property’s type.


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.


These enumeration values are passed to the DataSourcePropertyAttribute.DataSourcePropertyIsNullMode property.

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the DataSourcePropertyIsNullMode enum.


The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

See Also