public ImageDialog(Quiz quiz)
{
InitializeComponent();
// Store the supplied quiz
this.quiz = quiz;
}
public QuizAnswerer(Quiz quiz)
{
InitializeComponent();
// Store the supplied quiz
this.quiz = quiz;
// Create an array to store question answer state in
correctAnswers = new bool[quiz.Questions.Count];
// Randomize question order
// Makes use of LINQ to create a range of question indexes, and then order them according to a random number generator
Random rnd = new Random();
questionOrder = Enumerable.Range(0, quiz.Questions.Count).OrderBy<int, int>((item) => rnd.Next()).ToArray<int>();
// Initialize the question index
questionIndex = -1;
}
/// <summary>
/// Sets up a new quiz and adds a blank question to it
/// </summary>
private void setupNewQuiz()
{
SelectedQuiz = new Quiz();
SelectedQuestion = SelectedQuiz.AddQuestion();
updateQuestionList();
selectQuestion(0);
}
/// <summary>
/// Stores a quiz to a zip file
/// </summary>
/// <param name="quiz">The quiz to store</param>
/// <param name="path">The path of the zip file</param>
public static void StoreToZip(Quiz quiz, String path)
{
// Create a backup of the quiz if it already exists, in case something goes wrong
Boolean cleanup = false;
string backup = path + StringResources.MISC_BACKUP_EXTENSION;
if (File.Exists(path))
{
// Delete existing backup
// Shouldn't exist, but just in case it might
if (File.Exists(backup))
File.Delete(backup);
// Rename file
File.Move(path, backup);
cleanup = true;
}
try
{
// Open the zip file
using (ZipArchive archive = ZipFile.Open(path, ZipArchiveMode.Create))
{
// Rebuild image references and save images
quiz.ImageReferences.Clear();
for (int i = 0; i < quiz.Images.Count; i++)
{
Image image = quiz.Images[i];
ImageReference reference = new ImageReference { Path = String.Format(StringResources.PATH_IMAGE, i)};
quiz.ImageReferences.Add(reference);
reference.SaveImage(image, archive);
}
// Rebuild question references and save questions
quiz.QuestionReferences.Clear();
for (int i = 0; i < quiz.Questions.Count; i++)
{
Question question = quiz.Questions[i];
QuestionReference reference = new QuestionReference { Path = String.Format(StringResources.PATH_QUESTION, i) };
quiz.QuestionReferences.Add(reference);
reference.SaveQuestion(question, archive);
}
// Create file in archive
ZipArchiveEntry quizEntry = archive.CreateEntry(StringResources.PATH_QUIZ);
using (Stream stream = quizEntry.Open())
{
// Serialize the Quiz object to the file
XmlSerializer x = new XmlSerializer(typeof(Quiz));
x.Serialize(stream, quiz);
}
}
}
catch(Exception e)
{
// On error, restore backup
if (cleanup && File.Exists(backup))
{
File.Move(backup, path);
File.Delete(backup);
return;
}
// Then show an error message
MessageBox.Show(String.Format(StringResources.ERROR_SAVE_QUIZ, e.ToString()));
}
// Delete backup if all goes well
if (cleanup && File.Exists(backup))
{
File.Delete(backup);
return;
}
}