protected virtual void OnContextChanging(ContextChangingEventArgs e)
{
var handler = ContextChanging;
if (handler != null)
{
handler(this, e);
}
}
protected override void OnContextChanging(ContextChangingEventArgs e)
{
base.OnContextChanging(e);
if (e.Original != null)
{
e.Original.BindingSource.PositionChanged -= OnFocusedRowChanged;
}
if (e.New != null)
{
e.New.BindingSource.PositionChanged += OnFocusedRowChanged;
}
}