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.NET 8.0+

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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.v24.2.dll

NuGet Package: DevExpress.ExpressApp

#Declaration

public enum DataSourcePropertyIsNullMode

#Members

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

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

See Also