public IList <string> GetLastFieldValues(int classId, int classAnnouncementType, int count)
{
var conds = new AndQueryCondition
{
{ ClassAnnouncement.CLASS_REF_FIELD, classId },
{ ClassAnnouncement.CLASS_ANNOUNCEMENT_TYPE_REF_FIELD, classAnnouncementType },
{ ClassAnnouncement.SCHOOL_SCHOOLYEAR_REF_FIELD, schoolYearId }
};
var dbQuery = Orm.OrderedSelect(ClassAnnouncement.VW_CLASS_ANNOUNCEMENT_NAME, conds, Announcement.ID_FIELD, Orm.OrderType.Desc, count);
var anns = ReadMany <ClassAnnouncement>(dbQuery);
return(anns.Count == 0 ? new List <string>() : anns.Select(x => x.Content).Distinct().ToList());
}
