A behavior to keep DataGrid's SelectedItem into View

The following simple behavior will forces a DataGrid to keep its SelectedItem into view. The way that it works is simply hooking SelectionChanged event and calling DataGrid.ScrollIntoView method.

	using System.Windows.Controls;
	using System.Windows.Interactivity;
	public class KeepSelectionInView : Behavior<DataGrid>
	{
	protected override void OnAttached()
	{
	base.OnAttached();
	this.AssociatedObject.SelectionChanged += DataGrid_SelectionChanged;
	}
	protected override void OnDetaching()
	{
	base.OnDetaching();
	this.AssociatedObject.SelectionChanged -= DataGrid_SelectionChanged;
	}
	void DataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
	{
	if (AssociatedObject.SelectedItem != null)
	AssociatedObject.ScrollIntoView(AssociatedObject.SelectedItem);
	else if (AssociatedObject.SelectedItems != null && AssociatedObject.SelectedItems.Count > 0)
	AssociatedObject.ScrollIntoView(AssociatedObject.SelectedItems[0]);
	}
	}

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