public bool studentHasActivities(string phoneNumber, long roomId) { List <AnswerByPhoneData> answersData = AnswersByPhone.Where(record => record.Phone == phoneNumber && record.RoomID == roomId).ToList(); if (answersData.Count != 0) { return(true); } return(false); }
public void DeleteAllActivitiesOfStudent(string phoneNumber, long roomID) { List <AnswerByPhoneData> answersData = AnswersByPhone.Where(record => record.Phone == phoneNumber && record.RoomID == roomID).ToList(); foreach (AnswerByPhoneData answer in answersData) { answer.RoomID = -1; } SaveChanges(); }