private static IOrderedAsyncEnumerable <TSource> ThenByShim <TSource, TKey>(
IOrderedAsyncEnumerable <TSource> source, Func <TSource, TKey> expression, OrderingDirection orderingDirection)
{
return(orderingDirection == OrderingDirection.Asc
? source.ThenBy(expression)
: source.ThenByDescending(expression));
}
public static IOrderedAsyncEnumerable <T> ThenBy <T>(this IOrderedAsyncEnumerable <T> source, string column,
SortDirection direction, IEnumerable <string>?extraAllowedColumns = null)
{
var lambda = CreatePropertySelector <T>(column, extraAllowedColumns);
if (direction == SortDirection.Descending)
{
return(source.ThenByDescending(lambda));
}
return(source.ThenBy(lambda));
}
public static IOrderedAsyncEnumerable <TSource> ThenByDescending <TSource, TKey>(this IOrderedAsyncEnumerable <TSource> source, Func <TSource, TKey> keySelector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (keySelector == null)
{
throw new ArgumentNullException(nameof(keySelector));
}
return(source.ThenByDescending(keySelector, Comparer <TKey> .Default));
}
internal static IOrderedAsyncEnumerable <TSource> _ThenBy <TSource, TKey>(
IOrderedAsyncEnumerable <TSource> source, Func <TSource, TKey> expression, OrderingDirection orderingDirection)
=> orderingDirection == OrderingDirection.Asc
? source.ThenBy(expression)
: source.ThenByDescending(expression);