public static IOrderedQueryable <T> OrderIf <T, Tkey>(this IQueryable <T> source, Expression <Func <T, Tkey> > order, OrderByStatus status, bool isEnable)
{
IOrderedQueryable <T> result = null;
if (source == null || order == null)
{
return(null);
}
if (isEnable)
{
if (source.ContainOrderBy())
{
result = status == OrderByStatus.Asc ? ((IOrderedQueryable <T>)source).ThenBy(order) : ((IOrderedQueryable <T>)source).ThenByDescending(order);
}
else
{
result = status == OrderByStatus.Asc ? source.OrderBy(order) : source.OrderByDescending(order);
}
}
else
{
result = (source as IOrderedQueryable <T>);
}
return(result);
}
public static IOrderedQueryable <T> OrderIf <T, TKey>(this IQueryable <T> source, Expression <Func <T, TKey> > order, OrderByStatus status, bool isEnable)
{
IOrderedQueryable <T> orderedQueryable = (IOrderedQueryable <T>)null;
if (source != null && order != null)
{
orderedQueryable = !isEnable ? source as IOrderedQueryable <T> : (!source.ContainsOrderBy <T>() ? (status != OrderByStatus.ASC ? source.OrderByDescending <T, TKey>(order) : source.OrderBy <T, TKey>(order)) : (status != OrderByStatus.ASC ? (source as IOrderedQueryable <T>).ThenByDescending <T, TKey>(order) : (source as IOrderedQueryable <T>).ThenBy <T, TKey>(order)));
}
return(orderedQueryable);
}