public ExamNavigator(ExaminationSystem sys)
{
if (sys == null || sys.Questions.Count < 1)
{
throw new Exception("not valid Exam system to navigate else system is null or quesions not exist");
}
ExamSystem = sys;
//Current = sys.Questions[0];
}
public void LoadExam(Student std, Course crs)
{
sys = ExaminationSystem.LoadExam(std, crs);
nav = new ExamNavigator(sys);
lblTitle.Text = $"Student Id: {sys.Student.StId} , Name: {sys.Student.StName} Course: {sys.Course.CrsName}";
lblTimer.Text = "Start Exam";
nav.PositionChanged += (sender, e) =>
{
SetQuestion(e.Question);
};
nav.MoveNext();
//backThread.RunWorkerAsync();
timer.Interval = 1000;
timer.Tick += (sender, e) =>
{
lblTimer.Invoke((MethodInvoker) delegate()
{
var t = sys.EndTime - DateTime.Now;
lblTimer.Text = $" {t.Hours}:{t.Minutes}:{t.Seconds}";
});
if (DateTime.Now >= sys.EndTime)
{
this.Close();
}
};
timer.Start();
sys.StartTime = DateTime.Now;
//SetQuestion(sys.Questions[0]);
}