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Selection Modes

TreeDataGrid now exposes selection configuration directly on the control through SelectionMode.

Values

• Row: single row selection
• Row,Multiple: multiple row selection
• Cell: single cell selection
• Cell,Multiple: multiple cell selection

Example

<TreeDataGrid ItemsSource="{Binding People}"
              SelectionMode="Row,Multiple"/>

Control-Level Event

You can listen to TreeDataGrid.SelectionChanged without reaching into the source selection model:

private void OnSelectionChanged(object? sender, TreeDataGridSelectionChangedEventArgs e)
{
    foreach (var item in e.SelectedItems)
    {
        // ...
    }
}

The event args expose:

• SelectedIndexes and DeselectedIndexes
• SelectedItems and DeselectedItems
• SelectedCellIndexes and DeselectedCellIndexes

Source-Based Selection

If you use the code Source path, the underlying row and cell selection models now raise TreeDataGridSelectionChangedEventArgs as well.