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.v19.1.dll
Declaration
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.