public Student(int userId)
        {
            _studentTableAdapter = new STUDENTTableAdapter { ClearBeforeFill = true };
            InitializeComponent();
            CreateTimer();

            _studentData = _studentTableAdapter.GetData().FindBystudent_id(userId);
            LblStudentName.Content = String.Format("{0} {1} {2}", _studentData.student_firstname, _studentData.student_lastname, userId);
        }
        public Student(int userId)
        {
            _studentTableAdapter = new STUDENTTableAdapter {
                ClearBeforeFill = true
            };
            InitializeComponent();
            CreateTimer();

            _studentData           = _studentTableAdapter.GetData().FindBystudent_id(userId);
            LblStudentName.Content = String.Format("{0} {1} {2}", _studentData.student_firstname, _studentData.student_lastname, userId);
        }