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);
}
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);
}
