wpf-devexpress-dot-xpf-dot-grid-9e174dcb.md
Represents a trigger that selects a proper detail for each master row conditionally.
Namespace : DevExpress.Xpf.Grid
Assembly : DevExpress.Xpf.Grid.v25.2.Core.dll
NuGet Package : DevExpress.Wpf.Grid.Core
public class DetailDescriptorTrigger :
DXTriggerBase
Public Class DetailDescriptorTrigger
Inherits DXTriggerBase
In this example, the DetailDescriptorSelector displays different details based on the master row’s content. Assign the default detail descriptor to the DetailDescriptorSelector.DefaultValue property and use DetailDescriptorTriggers to conditionally switch it to an another detail. This trigger has the Binding and Value properties which work similarly to corresponding properties in a standard WPF DataTrigger.
View Example: Display Different Details Based on Data in the Master Row
<dxg:GridControl AutoGenerateColumns="AddNew" ItemsSource="{Binding Tasks}">
<dxg:GridControl.DetailDescriptor>
<dxg:DetailDescriptorSelector>
<dxg:DetailDescriptorSelector.DefaultValue>
<dxg:DataControlDetailDescriptor ItemsSourcePath="CompletedActions">
<dxg:GridControl AutoGenerateColumns="AddNew">
<dxg:GridControl.View>
<dxg:TableView ShowGroupPanel="False"/>
</dxg:GridControl.View>
</dxg:GridControl>
</dxg:DataControlDetailDescriptor>
</dxg:DetailDescriptorSelector.DefaultValue>
<dxg:DetailDescriptorTrigger Binding="{Binding Succeed}" Value="False">
<dxg:DataControlDetailDescriptor ItemsSourcePath="Errors">
<dxg:GridControl AutoGenerateColumns="AddNew">
<dxg:GridControl.View>
<dxg:TableView ShowGroupPanel="False"/>
</dxg:GridControl.View>
</dxg:GridControl>
</dxg:DataControlDetailDescriptor>
</dxg:DetailDescriptorTrigger>
</dxg:DetailDescriptorSelector>
</dxg:GridControl.DetailDescriptor>
<dxg:GridControl.View>
<dxg:TableView AutoWidth="True" ShowGroupPanel="False"/>
</dxg:GridControl.View>
</dxg:GridControl>
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the DetailDescriptorTrigger class.
Note
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wpf-data-grid-display-different-details-based-on-master-row-data/CS/WpfApp30/MainWindow.xaml#L27
</dxg:DetailDescriptorSelector.DefaultValue>
<dxg:DetailDescriptorTrigger Binding="{Binding Succeed}" Value="False">
<dxg:DataControlDetailDescriptor ItemsSourcePath="Errors">
Object DispatcherObject DependencyObject Freezable DXTriggerBase DetailDescriptorTrigger
See Also