expressappframework-devexpress-dot-expressapp-dot-model-dot-imodelcommonmemberviewitem-1cf8ac92.md
Specifies objects displayed in the current Lookup Property Editor, when the IModelMemberViewItem.DataSourceProperty property is null.
Namespace : DevExpress.ExpressApp.Model
Assembly : DevExpress.ExpressApp.v25.2.dll
NuGet Package : DevExpress.ExpressApp
[ModelBrowsable(typeof(ListEditorsVisibilityCalculator))]
DataSourcePropertyIsNullMode DataSourcePropertyIsNullMode { get; set; }
<ModelBrowsable(GetType(ListEditorsVisibilityCalculator))>
Property DataSourcePropertyIsNullMode As DataSourcePropertyIsNullMode
| 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.
|
This property is considered when the DataSourcePropertyAttribute is applied to the current Property Editor.
See Also
DataSourcePropertyIsNullCriteria
IModelCommonMemberViewItem Interface