/// <summary>
 ///     Update a Lecturer in the database
 /// </summary>
 /// <param name="lecturers">The updated Lecturer</param>
 private void updateLecturer(Lecturer lecturer)
 {
     string sql;
     sql = "UPDATE Lecturer";
     sql += "Lec_Name='" + lecturer.getName() + "', ";
     sql += "Initials='" + lecturer.getInitials() + "', ";
     sql += "Email='" + lecturer.getEmail() + "', ";
     sql += "MaxHours=" + lecturer.getMaxHours() + ", ";
     sql += "MaxConsecHours=" + lecturer.getMaxConsecHours() + ", ";
     sql += "MinSlotsPerDay=" + lecturer.getMinSlotsPerDay() + ", ";
     sql += "SlotsOff='" + lecturer.getSlotsOff() + "' ";
     sql += "WHERE ID LIKE '" + lecturer.getId() + "'";
     excuteNonQuery(sql);
 }
 /// <summary>
 ///     Add a new Lecturer to the database
 /// </summary>
 /// <param name="lecturer">The new Lecturer</param>
 private void insertLecturer(Lecturer lecturer)
 {
     string sql;
     sql = "INSERT INTO Lecturer (Lec_Name, Initials, Email, MaxHours, MaxConsecHours, MinSlotsPerDay, SlotsOff, Deleted) VALUES(";
     sql += "'" + lecturer.getName() + "', ";
     sql += "'" + lecturer.getInitials() + "', ";
     sql += "'" + lecturer.getEmail() + "', ";
     sql += lecturer.getMaxHours() + ", ";
     sql += lecturer.getMaxConsecHours() + ", ";
     sql += lecturer.getMinSlotsPerDay() + ", ";
     sql += "'" + lecturer.getSlotsOff() + "', false)";
     excuteNonQuery(sql);
 }