public static IOrderedEnumerable <T> SortBy <T, TKey>(
this IEnumerable <T> source,
IEnumerable <Sort> sort,
Func <T, TKey> defaultSort,
SortDirection defaultSortDirection = SortDirection.Asc)
{
IEnumerable <T> source1 = source;
List <Sort> scrubbedSortList = SortByExtensions.GetScrubbedSortList <T>(sort);
if (!scrubbedSortList.Any <Sort>())
{
if (defaultSortDirection != SortDirection.Desc)
{
return(source1.OrderBy <T, TKey>(defaultSort));
}
return(source1.OrderByDescending <T, TKey>(defaultSort));
}
for (int index = 0; index < scrubbedSortList.Count; ++index)
{
Sort sort1 = scrubbedSortList[index];
ParameterExpression parameterExpression = null;
Func <T, object> keySelector = Expression.Lambda <Func <T, object> >((Expression)Expression.Convert((Expression)Expression.Property((Expression)parameterExpression, sort1.Name), typeof(object)), parameterExpression).Compile();
source1 = index != 0 ? (sort1.Direction == SortDirection.Desc ? (IEnumerable <T>)((IOrderedEnumerable <T>)source1).ThenByDescending <T, object>(keySelector) : (IEnumerable <T>)((IOrderedEnumerable <T>)source1).ThenBy <T, object>(keySelector)) : (sort1.Direction == SortDirection.Desc ? (IEnumerable <T>)source1.OrderByDescending <T, object>(keySelector) : (IEnumerable <T>)source1.OrderBy <T, object>(keySelector));
}
return((IOrderedEnumerable <T>)source1);
}
public static IOrderedQueryable <T> SortBy <T, TKey>(
this IQueryable <T> source,
IEnumerable <Sort> sort,
Expression <Func <T, TKey> > defaultSort,
SortDirection defaultSortDirection = SortDirection.Asc)
{
IOrderedQueryable <T> source1 = (IOrderedQueryable <T>)source;
List <Sort> scrubbedSortList = SortByExtensions.GetScrubbedSortList <T>(sort);
if (!scrubbedSortList.Any <Sort>())
{
if (defaultSortDirection != SortDirection.Desc)
{
return(source1.OrderBy <T, TKey>(defaultSort));
}
return(source1.OrderByDescending <T, TKey>(defaultSort));
}
for (int index = 0; index < scrubbedSortList.Count; ++index)
{
Sort sort1 = scrubbedSortList[index];
string keyword = (index == 0 ? "OrderBy" : "ThenBy") + (sort1.Direction == SortDirection.Desc ? "Descending" : string.Empty);
source1 = source1.SortOrderedQueryableBy <T>(sort1.Name, keyword);
}
return(source1);
}