How To Change The Itemssource Of Detailsview At Runtime In Winui Datagrid?

Updated on Jan 16, 2026

This example describes how to change the itemssource of detailsview at runtime in WinUI DataGrid (SfDataGrid).

ItemsSource for DetailsViewDataGrid is populated from the DataContext of parent row based on ViewDefinition.RelationalColumn. DetailsViewDataGrid doesn’t update its ItemsSource at runtime based on the property change, which is mapped the DetailsViewDataGrid ItemsSource. You can update the ItemsSource on the property change by setting SfDataGrid.LiveDataUpdateMode as AllowChildViewUpdate.

XAML

<dataGrid:SfDataGrid Name="dataGrid"  
                       AutoGenerateColumns="True"
                       AutoGenerateRelations="True"
                       GridLinesVisibility="Both"
                       ItemsSource="{Binding Source}"                              
                       LiveDataUpdateMode="AllowChildViewUpdate,AllowDataShaping">

C

this.dataGrid.LiveDataUpdateMode = LiveDataUpdateMode.AllowChildViewUpdate | LiveDataUpdateMode.AllowDataShaping;