InstantFeedbackDataSourceBase.KeyExpression Property

Specifies the name of the key property.

Namespace: DevExpress.Xpf.Core.ServerMode

Assembly: DevExpress.Xpf.Core.v24.1.dll

NuGet Package: DevExpress.Wpf.Core

Declaration

C#

public string KeyExpression { get; set; }

VB.NET

Public Property KeyExpression As String

Property Value

Type	Description
String	A String value that specifies the key property name.

Remarks

Basically, the KeyExpression property specifies the name of the property mapped to the primary key column in the database.

You can modify the KeyExpression property value within the InstantFeedbackDataSourceBase.GetQueryable event handler, via the KeyExpression property.

Related GitHub Examples

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

Note

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.

XAML

how-to-implement-crud-operations-using-dxgrid-with-entity-framework-instant-feedback-e3759/CS/MainWindow.xaml#L54

</Grid.RowDefinitions>
<dx:EntityInstantFeedbackDataSource Name="entityInstantSource" KeyExpression="CustomerID" QueryableSource="{Binding Source={StaticResource ResourceKey=NorthwindEntities}, Path=Customers}" />
<dxg:GridControl Grid.Row="0" Name="grid" AutoGenerateColumns="None" ItemsSource="{Binding ElementName=entityInstantSource, Path=Data}">