private void RowMouseDownHandler(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
if (e.LeftButton == System.Windows.Input.MouseButtonState.Pressed &&
System.Windows.Input.Keyboard.PrimaryDevice.Modifiers == System.Windows.Input.ModifierKeys.Shift)
{
DataGridRow row = sender as DataGridRow; //GetVisualParentByType((System.Windows.FrameworkElement)e.OriginalSource, typeof(DataGridRow)) as DataGridRow;
if (row != null && row.DataContext != null && row.DataContext is ISelectable)
{
var rowItem = row.DataContext as ISelectable;
DataGrid dg = row.GetVisualParentOfType <DataGrid>();
if (dg != null && dg.ItemsSource != null && dg.SelectedItem != null)
{
if (dg.ItemsSource is System.Collections.Generic.IEnumerable <ISelectable> )
{
var dgSelItem = dg.SelectedItem as ISelectable;
var allItems = dg.ItemsSource as System.Collections.Generic.IEnumerable <ISelectable>;
var view = CollectionViewSource.GetDefaultView(allItems);
var itemsFromSel = view.OfType <ISelectable>().SkipWhile(i => i != dgSelItem && i != rowItem).Skip(1).TakeWhile(i => i != dgSelItem && i != rowItem).Where(i => !i.IsSelected).ToArray();
Array.ForEach(itemsFromSel, i => i.IsSelected = true);
}
}
}
}
}
