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DiagramDataBindingBehaviorBase.KeySelector Property

Gets or sets the selector that returns the data field that identifies the data item. This is a dependency property.

Namespace: DevExpress.Xpf.Diagram

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

NuGet Package: DevExpress.Wpf.Diagram

Declaration

public IKeySelector KeySelector { get; set; }

Property Value

Type Description
DevExpress.Diagram.Core.IKeySelector

An object implementing the DevExpress.Diagram.Core.IKeySelector interface.

Remarks

Use the KeySelector property to define a custom logic for choosing the data field that identifies the data item (e.g., when binding to data with multiple types of data objects). To do this, implement the GetKey method of the DevExpress.Diagram.Core.IKeySelector interface, so that it returns the data field that identifies the data item. See the example below.

<dxdiag:DiagramControl>
                <dxdiag:DiagramControl.Resources>
                    <local:DatabaseDefinitionKeySelector x:Key="databaseDefinitionKeySelector"/>
                </dxdiag:DiagramControl.Resources>
                <dxmvvm:Interaction.Behaviors>
                    <dxdiag:DiagramDataBindingBehavior ItemsSource="{Binding Database.Tables}"
                                                   ItemsPath="Columns" KeySelector="{StaticResource databaseDefinitionKeySelector}">
                        <!---->
                    </dxdiag:DiagramDataBindingBehavior>
                </dxmvvm:Interaction.Behaviors>
            </dxdiag:DiagramControl>

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

Note

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See Also