public string Get(DateTime filterDate, string subject, string classDomain, int range)
{
if (filterDate == null)
{
throw new ArgumentNullException(nameof(filterDate));
}
if (subject is null || subject == "-")
{
subject = "";
}
if (classDomain is null || classDomain == "-")
{
classDomain = "";
}
StudentDAO dao = new StudentDAO(this._config);
IEnumerable <Student> list = dao.GetRoomReport(filterDate, subject, classDomain, range);
return(JsonConvert.SerializeObject(list));
}