public static IOrderedQueryable <TSource> ThenBy <TSource>(this IOrderedQueryable <TSource> source, string field,
bool ascending = true)
{
if (string.IsNullOrWhiteSpace(field))
{
return(source);
}
if (field.Contains(" "))
{
var chunks = field.Split(' ');
if (chunks.Length == 2)
{
field = chunks[0];
ascending = string.Equals(chunks[1], "asc", StringComparison.InvariantCultureIgnoreCase);
}
}
var lambda = source.GetLambda(field);
if (!ascending)
{
return(source.ThenByDescending(lambda));
}
return(source.ThenBy(lambda));
}