LookUpEditSettingsBase.SelectItemWithNullValue Property
Gets or sets whether the editor searches for a null item in the bound data source when the editor value is null (empty). This is a dependency property.
Namespace: DevExpress.Xpf.Editors.Settings
Assembly: DevExpress.Xpf.Core.v23.2.dll
NuGet Package: DevExpress.Wpf.Core
Declaration
Property Value
| Type | Description |
|---|---|
| Boolean | true, to find and select an item with null value; otherwise, false. |
Remarks
In versions before 18.1, the editor searched for the null value in the source collection when its value was empty. This led to performance issues in forms with empty editors bound to large data sources.
Starting with version 18.1, the editor does not select any item in the source collection when its value is null. If items or value properties (specified in the editor’s LookUpEditSettingsBase.ValueMember property) in your source collection can be empty and you want to select them by assigning null to the editor’s edit value, set the SelectItemWithNullValue property to true.