public SortCriteria(string sortBy, SortDirectionOption direction)
{
Guard.Begin().IsNotNull(sortBy, nameof(sortBy)).Check();
SortBy = sortBy;
Direction = direction;
}
public static IOrderedQueryable <TSource> OrderBy <TSource, TKey>(this IQueryable <TSource> source, Expression <Func <TSource, TKey> > keySelector, SortDirectionOption direction)
{
switch (direction)
{
case SortDirectionOption.Ascending:
return(source.OrderBy(keySelector));
case SortDirectionOption.Descending:
return(source.OrderByDescending(keySelector));
default:
throw new InvalidOperationException("OrderBy SortDirection not valid.");
}
}
public static IOrderedEnumerable <TSource> ThenBy <TSource, TKey>(this IOrderedEnumerable <TSource> source, Func <TSource, TKey> keySelector, SortDirectionOption direction)
{
switch (direction)
{
case SortDirectionOption.Ascending:
return(source.ThenBy(keySelector));
case SortDirectionOption.Descending:
return(source.ThenByDescending(keySelector));
default:
throw new InvalidOperationException("ThenBy SortDirection not valid.");
}
}
public static IOrderedEnumerable <T> OrderBy <T>(this IEnumerable <T> source, string orderBy, SortDirectionOption direction)
{
return(source.OrderBy(new SortCriteria(orderBy, direction)));
}