Multiple rows can be selected when the TableView.MultiSelectMode option is set to MultiSelectMode.Row or MultiSelectMode.MultipleRow. You can use the GetSelectedRowHandles method to obtain the handles of the selected rows. Also, the SelectedItems property returns the collection of currently selected rows/nodes.
When multiple selection is disabled, the GetSelectedRowHandles method returns an array containing a single element that represents the focused row handle. This value can also be obtained using the DataViewBase.FocusedRowHandle property.