protected void customersDataSource_ContextCreated(object sender,
LinqDataSourceStatusEventArgs e) {
NorthwindDataContext dc = e.Result as NorthwindDataContext;
if (dc != null) {
// k objektu typu DataContext, aby s kadou instanc zkaznka 
// naetl objednvky z aktulnho roku.
DataLoadOptions dlo = new DataLoadOptions();
dlo.AssociateWith<Customer>(c => c.Orders
	.Where(o => o.OrderDate.Value.Year == DateTime.Now.Year));

dc.LoadOptions = dlo;
}
}
