//This button click event decrements the current question number value and populates the input fields with data from the previously saved question stored in the CurrentTestQuestions List <T> of the type MultipleChoice
private void BtPrevQuest_Click(object sender, RoutedEventArgs e)
{
if (CurrentTestQuestions.Count < Convert.ToInt32(lbQuestionNumber.Content))
{
MessageBox.Show("Please save the current question before viewing other questions", "Error");
}
else
{
MultipleChoice ques = new MultipleChoice();
ques.Question = new TextRange(rtQuestion.Document.ContentStart, rtQuestion.Document.ContentEnd).Text;
btNextQuest.IsEnabled = true;
lbQuestionNumber.Content = test.PreviousQuestion().ToString();
test.QuestionNumber = Convert.ToInt32(lbQuestionNumber.Content);
tbA.Text = CurrentTestQuestions[test.QuestionNumber - 1].OptionA;
tbB.Text = CurrentTestQuestions[test.QuestionNumber - 1].OptionB;
tbC.Text = CurrentTestQuestions[test.QuestionNumber - 1].OptionC;
tbD.Text = CurrentTestQuestions[test.QuestionNumber - 1].OptionD;
rtQuestion.Document.Blocks.Clear();
rtQuestion.Document.Blocks.Add(new Paragraph(new Run(CurrentTestQuestions[test.QuestionNumber - 1].Question)));
switch (CurrentTestQuestions[test.QuestionNumber - 1].CorrectAnswer)
{
case "A":
combCorrectAns.SelectedIndex = 1;
break;
case "B":
combCorrectAns.SelectedIndex = 2;
break;
case "C":
combCorrectAns.SelectedIndex = 3;
break;
case "D":
combCorrectAns.SelectedIndex = 4;
break;
}
}
if (Convert.ToInt32(lbQuestionNumber.Content) != QuestionCounter)
{
btNewQuestion.IsEnabled = false;
}
if (lbQuestionNumber.Content.ToString().Equals("1"))
{
btPrevQuest.IsEnabled = false;
btNextQuest.IsEnabled = true;
}
}
//This button click event adds or overwrites new question data from the current input fields using a List <T> of the type MultipleChoice
private void BtSaveQuestion_Click(object sender, RoutedEventArgs e)
{
MultipleChoice ques = new MultipleChoice();
ques.Question = new TextRange(rtQuestion.Document.ContentStart, rtQuestion.Document.ContentEnd).Text;
if (ques.Question.Equals("") || tbA.Text.Equals("") || tbB.Text.Equals("") || tbC.Text.Equals("") || tbD.Text.Equals("") || combCorrectAns.SelectedIndex == 0)
{
MessageBox.Show("Please ensure all question fields are filled before saving a question");
}
else
{
ques.Name = test.Name;
ques.OptionA = tbA.Text;
ques.OptionB = tbB.Text;
ques.OptionC = tbC.Text;
ques.OptionD = tbD.Text;
ques.CorrectAnswer = combCorrectAns.Text;
if (CurrentTestQuestions.Count >= QuestionCounter)
{
CurrentTestQuestions.RemoveAt(Convert.ToInt32(lbQuestionNumber.Content) - 1);
}
try
{
CurrentTestQuestions.Insert(Convert.ToInt32(lbQuestionNumber.Content) - 1, ques);
}
catch (Exception)
{
CurrentTestQuestions.Add(ques);
}
MessageBox.Show("Question " + test.QuestionNumber + " Saved Successfully!\nClick [Add New Question] to add another question, or [Submit Test] if you are finished", "Success!");
if (Convert.ToInt32(lbQuestionNumber.Content) == QuestionCounter)
{
btNewQuestion.IsEnabled = true;
}
}
}