private void QuestionListBox_MouseDoubleClick(object sender, MouseEventArgs e)
{
//When the user selects a question the question information is displayed over the previous, this code completes that action
AnswerHeaderLabel.Show();
QuestionHeaderLabel.Show();
if (QuestionListBox.SelectedItem == null)
{
}
else
{
//Assigning the selected question to a variable
StoredQuestions SelectedQuestion = (StoredQuestions)QuestionListBox.SelectedItem;
if (SelectedQuestion.PictureUrl == "" || SelectedQuestion.PictureUrl == null)
{
QuestionPictureBox.Hide();
}
else
{
QuestionPictureBox.Show();
QuestionPictureBox.Image = Image.FromFile(SelectedQuestion.PictureUrl);
}
QuestionLabel.Text = SelectedQuestion.Question;
AnswerLabel.Text = SelectedQuestion.CorrectAns;
}
}
private void AddButton_Click(object sender, EventArgs e)
{
//When the add button is pressed the question must be coppied from the stored questions, to the NewQuiz collection
if (QuestionListBox.SelectedItem == null)
{
return;
}
else if (NewQuiz.Count() == 15)
{
//Only 15 questions MAX are allowed per quiz so if they try to add too many the program will display this error
MessageBox.Show("Error, Invalid number of items, please select between 3 and 15 questions. Remove items or create multiple quizzes.", "Error", MessageBoxButtons.OK);
return;
}
StoredQuestions SelectedQuestion = (StoredQuestions)QuestionListBox.SelectedItem;
//If the quiz already contains the question then this message will display
if (NewQuiz.Contains(SelectedQuestion))
{
string message = "This question has already been added to the quiz!";
string caption = "Error Detected in Input";
MessageBoxButtons buttons = MessageBoxButtons.OK;
MessageBox.Show(message, caption, buttons);
return;
}
//If none of the other criteria have occured it will add the question to the quiz
NewQuiz.Add(SelectedQuestion);
//Resets the variables
QuizListBox.DataSource = null;
QuizListBox.DataSource = NewQuiz;
QuizListBox.DisplayMember = "Question";
QuestionCapacityProgressBar.Increment(1);
}
StoredQuestions CurrentQuestion = new StoredQuestions(); //The current question is stored here
public TextQuestionForm(StoredQuestions CQuestions)
{
InitializeComponent();
CurrentQuestion = CQuestions; //The paramter of the current question is passed into the form
QuestionLabel.Text = CurrentQuestion.Question; //The currentquestion`s question is displayed
List <string> Answers = new List <string>(); //A new list of answers is created
//Each individual answer that is stored in currentquestion including the correct answer and the 3 incorrect ones
Answers.Add(CurrentQuestion.CorrectAns);
Answers.Add(CurrentQuestion.IncorrectAns1);
Answers.Add(CurrentQuestion.IncorrectAns2);
Answers.Add(CurrentQuestion.IncorrectAns3);
//Answers are shuffled
Answers = Answers.OrderBy(x => Guid.NewGuid()).ToList();
//The answers are assigned to the radio buttons
AnswerRadioButton1.Text = $"{Answers.ElementAt(0)}";
AnswerRadioButton2.Text = $"{ Answers.ElementAt(1)}";
AnswerRadioButton3.Text = $"{ Answers.ElementAt(2)}";
AnswerRadioButton4.Text = $"{ Answers.ElementAt(3)}";
}
private void RemoveButton_Click(object sender, EventArgs e)
{
//If no question is selected then the question cannot be removed
if (QuizListBox.SelectedItem == null)
{
return;
}
//The selected question is saved to a variable
StoredQuestions SelectedQuestion = (StoredQuestions)QuizListBox.SelectedItem;
//Removes the question from the quiz
NewQuiz.Remove(SelectedQuestion);
QuizListBox.DataSource = null;
QuizListBox.DataSource = NewQuiz;
QuizListBox.DisplayMember = "Question";
QuestionCapacityProgressBar.Increment(-1);
}
private void StartQuizButton_Click(object sender, EventArgs e)
{
//Hides the main form
this.Hide();
CalculateDifficulty cd = new CalculateDifficulty(); //Claculated difficulty is initilised
//Trys to decide which option the user wants.
//Adaptive question order: Questions answered incorrectly are presented more often than the correct ones
//Standard: Questions are presented normally
//If the user hasn`t selected an option a null exception is thrown
try
{
if (SelectModeComboBox.SelectedItem.ToString() == "Adaptive Questions Order")
{
foreach (CompletedQuestion cq in completedQuestion)
{
if ((cq.CalculatedDifficulty > 80) && (cq.XCompleted > 5))
{
//This removes the question from the quiz so that the user doesn`t answer this question that they have already answered correctly the majority of times
storedQuizQuestions.Remove(storedQuizQuestions.Find(x => x.QuestionId == cq.QuestionId));
}
}
}
}
catch (System.NullReferenceException)
{
//The null excpetion is caught and this message is displayed
MessageBox.Show("Please Select A Question Mode", "Error", MessageBoxButtons.OK);
return;
}
//The stored quiz question need to be shuffled so this line of code does that
List <StoredQuizQuestions> ShuffledQuizQuestions = storedQuizQuestions.OrderBy(x => Guid.NewGuid()).ToList();
foreach (StoredQuizQuestions QuizQuestion in ShuffledQuizQuestions)
{
StoredQuestions CurrentQuestion = (storedQuestions.Find(x => x.QuestionId == QuizQuestion.QuestionId)); //The current question is saved to the varaible called current question
CompletedQuestion CurrentCompletedQuestion = (completedQuestion.Find(x => x.QuestionId == QuizQuestion.QuestionId));
if (CurrentQuestion.PictureUrl == "") //If there is no picture URL then it doesn`t have a picture
{
var page2 = new TextQuestionForm(CurrentQuestion); //The next form is created
page2.Answered += (source, Correct) => //This event is used to return the answer that the user selects and treats it accordingly based upon if the correct bool is true or false
{
//Question is removed from both storedquestion and completedquestion
storedQuestions.Remove(CurrentQuestion);
completedQuestion.Remove(CurrentCompletedQuestion);
//If the user has ansewred correctly then the current quiz question`s XAnsweredCorrect will increase by one
if (Correct == true)
{
CurrentQuestion.XAnsweredCorrectly++;
CurrentCompletedQuestion.XCorrect++;
}
//Regardless of if the answer was answered correctly the times answered counter must also increment by one
CurrentQuestion.XAnswered++;
CurrentCompletedQuestion.XCompleted++;
//The difficulty rating must be recalculated
CurrentQuestion.CalculatedDifficulty = cd.CalcDifficulty(CurrentQuestion.XAnswered, CurrentQuestion.XAnsweredCorrectly);
CurrentCompletedQuestion.CalculatedDifficulty = cd.CalcDifficulty(CurrentCompletedQuestion.XCompleted, CurrentCompletedQuestion.XCorrect);
//The question is added back to the storedquestion and complted question lists
storedQuestions.Add(CurrentQuestion);
completedQuestion.Add(CurrentCompletedQuestion);
};
//Displays the question answering form
page2.ShowDialog();
}
else
{
var page2 = new PictureQuestionForm(CurrentQuestion);
page2.Answered += (source, Correct) =>
{
//Question is removed from both storedquestion and completedquestion
storedQuestions.Remove(CurrentQuestion);
completedQuestion.Remove(CurrentCompletedQuestion);
//If the user has ansewred correctly then the current quiz question`s XAnsweredCorrect will increase by one
if (Correct == true)
{
CurrentQuestion.XAnsweredCorrectly++;
CurrentCompletedQuestion.XCorrect++;
}
//Regardless of if the answer was answered correctly the times answered counter must also increment by one
CurrentQuestion.XAnswered++;
CurrentCompletedQuestion.XCompleted++;
//The difficulty rating must be recalculated
CurrentQuestion.CalculatedDifficulty = cd.CalcDifficulty(CurrentQuestion.XAnswered, CurrentQuestion.XAnsweredCorrectly);
CurrentCompletedQuestion.CalculatedDifficulty = cd.CalcDifficulty(CurrentCompletedQuestion.XCompleted, CurrentCompletedQuestion.XCorrect);
//The question is added back to the storedquestion and complted question lists
storedQuestions.Add(CurrentQuestion);
completedQuestion.Add(CurrentCompletedQuestion);
};
//Displays the question answering form
page2.ShowDialog();
}
}
//Question class is initilized
QuestionClass qc = new QuestionClass();
//The method update scored is called in order to refresh the scored that are in the database
qc.UpdateScores(storedQuestions, completedQuestion);
this.Show();
}
