public static SelectExpression AddOrderExpression(this SelectExpression select, OrderExpression ordering) { List<OrderExpression> orderby = new List<OrderExpression>(); if (select.OrderBy != null) orderby.AddRange(select.OrderBy); orderby.Add(ordering); return select.SetOrderBy(orderby); }
public static SelectExpression RemoveOrderExpression(this SelectExpression select, OrderExpression ordering) { if (select.OrderBy != null && select.OrderBy.Count > 0) { List<OrderExpression> orderby = new List<OrderExpression>(select.OrderBy); orderby.Remove(ordering); return select.SetOrderBy(orderby); } return select; }