public DynamicOrderedQueryable OrderBy(IEnumerable <OrderItem> orderItems)
{
if (orderItems == null)
{
throw new ArgumentNullException(nameof(orderItems), "Order items cannot be null");
}
DynamicOrderedQueryable res = null;
foreach (var item in orderItems)
{
var l =
item.ParseExpressionAs == ParseExpressionAs.Property ?
Expressions.MemberExpressionBuilder.GetPropertySelector(Source.ElementType, item.Expression) :
item.ParseExpressionAs == ParseExpressionAs.NestedProperty ?
Expressions.MemberExpressionBuilder.GetDeepPropertySelector(Source.ElementType, item.Expression)
:
Expressions.MemberExpressionBuilder.GetExpressionSelector(Source.ElementType, item.Expression);
if (res == null)
{
res = (item.IsDescending ? OrderByDescending(l) : OrderBy(l));
}
else
{
res = (item.IsDescending ? res.ThenByDescending(l) : res.ThenBy(l));
}
}
return(res ?? new DynamicOrderedQueryable(Source));
}
public DynamicOrderedQueryable ThenBy(IEnumerable <OrderItem> orderItems)
{
if (orderItems == null || !orderItems.Any())
{
throw new ArgumentNullException(nameof(orderItems), "Order items cannot be null or empty");
}
DynamicOrderedQueryable res = null;
foreach (var item in orderItems)
{
var l = Expressions.MemberExpressionBuilder.GetPropertySelector(Source.ElementType, item.Expression);
if (res != null)
{
res = (item.IsDescending ? res.ThenByDescending(l) : res.ThenBy(l));
}
else
{
res = (item.IsDescending ? OrderByDescending(l) : OrderBy(l));
}
}
return(res);
}
