public static IOrderedQueryable <T> ThenBy <T>(this ISortDescription <T> desc, IOrderedQueryable <T> source)
{
if (desc.IsDescending == true)
{
return(source.ThenByDescending(desc.SortExpression));
}
else
{
return(source.ThenBy(desc.SortExpression));
}
}
public static void ToggleIsDescending <T>(this ISortDescription <T> desc)
{
desc.IsDescending = !desc.IsDescending ?? true;
}
protected override IEnumerable <ISortDescription <FileViewModel> > OrderBy(ISortDescription <FileViewModel> current)
{
var isNotAlias = new SortDescriptionViewModel <FileViewModel>("IsNotAlias", x => x.IsNotAlias);
return(new ISortDescription <FileViewModel>[] { isNotAlias, current });
}