public static void GetQuestions(QuizData quiz)
{
//TODO replace code to get questions from database
quiz.questions.Clear();
QuestionData newQuestion = new QuestionData(0);
AnswerData correctAnswer = new AnswerData(0);
AnswerData wrongAnswer = new AnswerData(0);
correctAnswer.Correct = true;
correctAnswer.Text = "This is the correct answer";
wrongAnswer.Text = "This is a wrong answer";
newQuestion.Text = "This is a question";
newQuestion.answers.Add(correctAnswer);
newQuestion.answers.Add(wrongAnswer);
newQuestion.answers.Add(wrongAnswer);
newQuestion.answers.Add(wrongAnswer);
for (int i = 0; i < 10; i++)
{
quiz.questions.Add(newQuestion);
}
}
public static bool ValidateQuestion(QuestionData theQuestion)
{
bool is_valid = true;
if (theQuestion.Text.Length <= 4) {
is_valid = false;
}
foreach (AnswerData data in theQuestion.Answers) {
is_valid = AnswerController.ValidateAnswer(data);
if (!is_valid)
break;
}
if (is_valid)
if (theQuestion.Answers.Count < 2)
is_valid = false;
if (is_valid) {
int count = 0;
for (int i = 0; i < theQuestion.Answers.Count; i++)
if (theQuestion.Answers[i].Correct)
count++;
is_valid = (count == 1);
}
return is_valid;
}
/// <summary>
/// Gets the number of correct answers for a question
/// </summary>
/// <param name="theQuestion"></param>
/// <returns></returns>
public int CountCorrect(QuestionData theQuestion)
{
try
{
if (DataReader != null)
DataReader.Close();
this.SQL = "SELECT COUNT(ra.`user_id`) AS `CountCorrect` FROM `questions` q " +
"JOIN `rel_questions_answers` qa ON q.`question_id` = qa.`question_id` " +
"JOIN `answers` a ON qa.`answer_id` = a.`answer_id` " +
"JOIN `rel_answers_users` ra ON a.`answer_id` = ra.`answer_id` " +
"WHERE a.`is_correct` = 1 AND q.`question_id` = " + theQuestion.Id + " " +
"GROUP BY q.`question_id`;";
this.InitializeCommand();
OpenConnection();
this.DataReader = this.Command.ExecuteReader();
if (this.DataReader.HasRows)
{
this.DataReader.Read();
return DataReader.GetUInt16("CountCorrect");
}
else
return 0;
}
catch (System.Exception e)
{
throw new System.Exception(e.Message, e.InnerException);
}
finally
{
}
}
public void AddQuestion(QuizData theQuiz, QuestionData theQuestion)
{
if (DataReader != null)
DataReader.Close();
SQL = "INSERT INTO `rel_quizzes_questions` (`quiz_id`, `question_id`) VALUES (\"" + theQuiz.Id + "\", \"" + theQuestion.Id + "\");";
InitializeCommand();
int result = ExecuteStoredProcedure();
if (result == 0)
throw new Exception("Unable to add question to quiz");
}
public static void SaveQuestion(QuestionData theQuestion)
{
if (theQuestion.Id == 0) {
if (ValidateQuestion(theQuestion))
theEntity.UpdateQuestion(theQuestion);
} else {
if (ValidateQuestion(theQuestion))
theEntity.UpdateQuestion(theQuestion);
}
}
public void CreateQuestion(QuestionData theQuestion)
{
theQuestion.Id = NextId;
AnswerEntity temp;
temp = new AnswerEntity();
for (int i = 0; i < theQuestion.Answers.Count; i++) {
temp.CreateAnswer(theQuestion.Answers[i]);
}
temp.Dispose();
if (DataReader != null)
DataReader.Close();
SQL = "INSERT INTO `questions` (`question_id`, `question`) VALUES (\"" + theQuestion.Id + "\", \"" + theQuestion.Text + "\");";
OpenConnection();
InitializeCommand();
int result = ExecuteStoredProcedure();
if (DataReader != null)
DataReader.Close();
if (result == 0)
throw new Exception("Cannot add the selected question to the database");
for (int i = 0; i < theQuestion.Answers.Count; i++) {
if (DataReader != null)
DataReader.Close();
SQL = "INSERT INTO `rel_questions_answers` (`question_id`, `answer_id`) VALUES (\"" +
theQuestion.Id +
"\", \"" +
theQuestion.Answers[i].Id +
"\");";
InitializeCommand();
result = ExecuteStoredProcedure();
if (result == 0)
throw new Exception("One or more of the answers could not be added to the database");
}
CloseConnection();
}
/// <summary>
/// Default Constructor
/// Stores references to external variables
/// </summary>
/// <param name="question">question to be editing</param>
public frmQuestion(QuestionData question)
{
externalQuestion = question; //copy external reference
isNewQuestion = (question.Answers.Count == 0); //if we have no questions, we know were new
InitializeComponent();
//if we have data then display it
if (externalQuestion.Answers.Count > 0)
{
txtQuestion.Text = externalQuestion.Text;
txtAnswer1.Text = externalQuestion.Answers[0].Text;
txtAnswer2.Text = externalQuestion.Answers[1].Text;
txtAnswer3.Text = externalQuestion.Answers[2].Text;
txtAnswer4.Text = externalQuestion.Answers[3].Text;
rbtn1.Checked = externalQuestion.Answers[0].Correct;
rbtn2.Checked = externalQuestion.Answers[1].Correct;
rbtn3.Checked = externalQuestion.Answers[2].Correct;
rbtn4.Checked = externalQuestion.Answers[3].Correct;
}
}
public QuestionBox(QuestionData question, int number)
{
//
// rbtnAnswers
//
rbtnAnswers = new RadioButton[question.answers.Count];
for (int i = question.answers.Count - 1; i >= 0; i--)
{
rbtnAnswers[i] = new RadioButton();
rbtnAnswers[i].Text = question.answers[i].text;
rbtnAnswers[i].Dock = DockStyle.Top;
rbtnAnswers[i].Padding = new Padding(15, 3, 3, 3);
Controls.Add(rbtnAnswers[i]);
}
//
// lblQuestion
//
lblQuestion = new Label();
lblQuestion.Text = question.Text;
lblQuestion.Dock = DockStyle.Top;
lblQuestion.Padding = new Padding(10, 3, 3, 3);
Controls.Add(lblQuestion);
//
// lblHeader
//
lblHeader = new Label();
lblHeader.Text = "#" + number;
lblHeader.TextAlign = ContentAlignment.MiddleLeft;
lblHeader.Font = new Font("Lucida Handwriting", 24, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Pixel, ((byte)(0)));
lblHeader.Dock = DockStyle.Top;
lblHeader.Height = 32;
lblHeader.BackColor = Color.Maroon;
lblHeader.ForeColor = Color.White;
Controls.Add(lblHeader);
//
// QuestionBox
//
this.Height = rbtnAnswers[rbtnAnswers.GetLength(0) - 1].Bottom;
}
public QuestionData ReadQuestion(int id)
{
QuestionData return_data = null;
if (DataReader != null)
DataReader.Close();
SQL = "SELECT * FROM `questions` q WHERE q.`question_id` = \"" + id + "\";";
InitializeCommand();
OpenConnection();
DataReader = Command.ExecuteReader();
if (DataReader.HasRows) {
DataReader.Read();
return_data = new QuestionData(DataReader.GetUInt16("question_id"));
return_data.Text = DataReader.GetString("question");
DataReader.Close();
}
if (return_data != null) {
AnswerEntity temp = new AnswerEntity();
List<AnswerData> temp1 = temp.ReadAnswers(return_data);
for (int i = 0; i < temp1.Count; i++)
return_data.AddAnswer(temp1[i]);
temp.Dispose();
}
CloseConnection();
return return_data;
}
public void UpdateQuestion(QuestionData theQuestion)
{
AnswerEntity temp = new AnswerEntity();
for (int i = 0; i < theQuestion.Answers.Count; i++)
temp.UpdateAnswer(theQuestion.Answers[i]);
temp.Dispose();
if (DataReader != null)
DataReader.Close();
SQL = "UPDATE `questions` q SET q.`question` = \"" + theQuestion.Text + "\" WHERE q.`question_id` = \"" + theQuestion.Id + "\";";
OpenConnection();
InitializeCommand();
int result = ExecuteStoredProcedure();
CloseConnection();
if (result == 0)
throw new Exception("Unable to edit the question on database");
}
/// <summary>
/// Gets a list of Answers object associated with a question
/// </summary>
/// <param name="theQuestion">the question being queried</param>
/// <returns>a list of Answer objects</returns>
public List<AnswerData> ReadAnswers(QuestionData theQuestion)
{
List<AnswerData> return_data = new List<AnswerData>();
if (DataReader != null)
DataReader.Close();
SQL = "SELECT * from `answers` a INNER JOIN `rel_questions_answers` r ON r.`answer_id` = a.`answer_id` WHERE r.`question_id` = \"" + theQuestion.id + "\";";
InitializeCommand();
OpenConnection();
DataReader = Command.ExecuteReader();
if (DataReader.HasRows) {
while (DataReader.Read()) {
AnswerData temp = new AnswerData(DataReader.GetUInt16("answer_id"));
temp.Correct = DataReader.GetBoolean("is_correct");
temp.Text = DataReader.GetString("text");
return_data.Add(temp);
}
}
CloseConnection();
return return_data;
}
public void DeleteQuestion(QuestionData theQuestion)
{
if (DataReader != null)
DataReader.Close();
SQL = "DELETE `questions`, `answers`, `rel_questions_answers` FROM `questions` INNER JOIN `rel_questions_answers` on `questions`.`question_id` = `rel_questions_answers`.`question_id` INNER JOIN `answers` ON `answers`.`answer_id` = `rel_questions_answers`.`answer_id` WHERE `questions`.`question_id` = \"" + theQuestion.Id + "\";";
InitializeCommand();
OpenConnection();
int result = ExecuteStoredProcedure();
CloseConnection();
if (result == 0)
throw new Exception("Could not delete the data from the database");
}
void btnAddQuestion_Click(object sender, EventArgs e)
{
QuestionData newQuestion = new QuestionData(0);
frmQuestion questionForm = new frmQuestion(newQuestion);
questionForm.ShowDialog();
//check to see the question is valid ie user didnt cancel
if (newQuestion.Answers.Count > 0)
{
//add question to display
QuestionBox questionBox = new QuestionBox(newQuestion, questionBoxes.Count + 1, myObjective);
questionBox.Disposed += new EventHandler(questionBox_Disposed);
questionBoxes.Add(questionBox);
pnlMain.Controls.Add(questionBox);
//add question to currentQuiz we are editing
GlobalData.currentQuiz.addQuestion(newQuestion);
//set locations via resize
pnlMain_Resize(null, null);
pnlMain.ScrollControlIntoView(questionBox);
}
}
public QuestionBox(QuestionData question, int number, Objective objective)
{
//copy question
myQuestion = question;
//copy objective
myObjective = objective;
//create default components
InitializeComponent();
//Create objective specific controls
InitializeObjectiveComponent();
//
// QuestionBox
//
this.BackColor = Color.White;
this.BorderStyle = BorderStyle.FixedSingle;
this.Resize += new EventHandler(QuestionBox_Resize);
//set the number
Number = number;
}
public static int GetWrongCount(QuestionData theQuestion)
{
return theEntity.CountWrong(theQuestion);
}
public static void DeleteQuestion(QuestionData theQuestion)
{
theEntity.DeleteQuestion(theQuestion);
}
public void addQuestion(QuestionData dataIn)
{
questions_internal.Add(dataIn);
}
public void addQuestion(QuestionData dataIn)
{
questions_internal.Add(dataIn);
}
public static int GetCorrectCount(QuestionData theQuestion)
{
return theEntity.CountCorrect(theQuestion);
}
