/// <summary>
/// Method to read questions from an xml file
/// </summary>
/// <param name="xmlFilePath">Fully qualified path to xml file</param>
/// <returns>A specially formatted dictionary containing the questions in the xml file</returns>
public static Dictionary<string, List<Question>> ReadExamToFormat(string xmlFilePath)
{
XPathDocument doc = new XPathDocument(xmlFilePath);
XPathNavigator nav = doc.CreateNavigator();
XmlNamespaceManager nm = new XmlNamespaceManager(nav.NameTable);
Dictionary<string, List<Question>> formattedQuestionList = new Dictionary<string, List<Question>>();
XPathExpression expression = nav.Compile("//Section");
XPathNodeIterator rootIterator = nav.Select(expression);
while (rootIterator.MoveNext())
{
string sectionTitle = rootIterator.Current.GetAttribute("Title", nm.DefaultNamespace);
List<Question> sectionQuestions = new List<Question>();
XPathNodeIterator subIterator = rootIterator.Current.SelectChildren(XPathNodeType.Element);
while (subIterator.MoveNext())
{
Question ques = new Question();
ques.SectionTitle = sectionTitle;
ques.QuestionNumber = Convert.ToInt32(subIterator.Current.GetAttribute("No", nm.DefaultNamespace));
Dictionary<char, string> options = new Dictionary<char, string>();
XPathNodeIterator iter = subIterator.Current.SelectChildren(XPathNodeType.Element);
while (iter.MoveNext())
{
if (iter.Current.LocalName == "Text")
{
ques.QuestionText = iter.Current.Value;
}
else if (iter.Current.LocalName == "Image")
{
if (string.IsNullOrWhiteSpace(iter.Current.Value))
{
ques.QuestionImagePath = null;
}
else
{
ques.QuestionImagePath = Path.Combine(Path.GetDirectoryName(xmlFilePath), iter.Current.Value);
}
}
else if (iter.Current.LocalName == "Answer")
{
ques.QuestionAnswer = Convert.ToChar(iter.Current.Value);
}
if (iter.Current.LocalName == "Options")
{
XPathNodeIterator ite = iter.Current.SelectChildren(XPathNodeType.Element);
while (ite.MoveNext())
{
char option;
string optionText;
option = Convert.ToChar(ite.Current.GetAttribute("Title", nm.DefaultNamespace));
optionText = ite.Current.Value;
options.Add(option, optionText);
}
ques.QuestionOptions = options;
}
}
sectionQuestions.Add(ques);
}
formattedQuestionList.Add(sectionTitle, sectionQuestions);
}
return formattedQuestionList;
}
private void PushPreviousQuestion(TreeNode questionNode)
{
Question queryResult = rawQuestionList.FirstOrDefault(s => s.SectionTitle == questionNode.Parent.Text && s.QuestionNumber == Convert.ToInt32(questionNode.Text.Replace("Question ", "")));
if (queryResult != null)
{
int questionIndex = rawQuestionList.IndexOf(queryResult);
rawQuestionList[questionIndex].AnswerExplanation = txt_answer_explanation.Text;
if (pan_options.Controls.Count > 0)
{
if ((pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)) != null)
{
rawQuestionList[questionIndex].QuestionAnswer = (pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter;
}
else
{
rawQuestionList[questionIndex].QuestionAnswer = 'A';
}
}
rawQuestionList[questionIndex].QuestionImagePath = pct_question_picture.ImageLocation;
rawQuestionList[questionIndex].QuestionNumber = Int32.Parse(questionNode.Text.Replace("Question ", ""));
Dictionary<char, string> questionOptionList = new Dictionary<char, string>();
foreach (OptionControl option in (pan_options.Controls.OfType<OptionControl>()))
{
questionOptionList.Add(option.OptionLetter, option.OptionText);
}
rawQuestionList[questionIndex].QuestionOptions = questionOptionList;
rawQuestionList[questionIndex].QuestionText = txt_question_text.Text;
rawQuestionList[questionIndex].SectionTitle = questionNode.Parent.Text;
}
else
{
Question question = new Question();
question.AnswerExplanation = txt_answer_explanation.Text;
if (pan_options.Controls.Count > 0)
{
if ((pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)) != null)
{
question.QuestionAnswer = (pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter;
}
else
{
question.QuestionAnswer = 'A';
}
}
question.QuestionImagePath = pct_question_picture.ImageLocation;
question.QuestionNumber = Int32.Parse(questionNode.Text.Replace("Question ", ""));
Dictionary<char, string> questionOptionList = new Dictionary<char, string>();
foreach (OptionControl option in (pan_options.Controls.OfType<OptionControl>()))
{
questionOptionList.Add(option.OptionLetter, option.OptionText);
}
question.QuestionOptions = questionOptionList;
question.QuestionText = txt_question_text.Text;
question.SectionTitle = questionNode.Parent.Text;
rawQuestionList.Add(question);
}
}
private void Open(string examFilePath)
{
CloseExam(null, null);
New_Exam(null, null);
CurrentFileNameWithExtension = examFilePath;
string foldername = Path.GetFileNameWithoutExtension(examFilePath);
string extractionFolderPath = Path.Combine(GlobalPathVariables.creatorFolderPath, foldername);
if (Directory.Exists(extractionFolderPath))
{
Directory.Delete(extractionFolderPath, true);
Directory.CreateDirectory(extractionFolderPath);
}
else
{
Directory.CreateDirectory(extractionFolderPath);
}
using (ZipFile zip = new ZipFile(examFilePath))
{
zip.ExtractAll(extractionFolderPath, ExtractExistingFileAction.OverwriteSilently);
}
string[] temp = Directory.GetFiles(extractionFolderPath, "*.xml", SearchOption.TopDirectoryOnly);
string xmlFilePath = null;
if (temp.Length > 0)
xmlFilePath = temp[0];
if (string.IsNullOrWhiteSpace(xmlFilePath))
{
MessageBox.Show("Sorry, the selected exam file is invalid!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
XPathDocument doc = new XPathDocument(xmlFilePath);
XPathNavigator navigator = doc.CreateNavigator();
string version = "";
XPathExpression expression = navigator.Compile("//FileVersion");
XPathNodeIterator iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
version = iterator.Current.Value;
}
expression = navigator.Compile("//ExamTitle");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
txt_exam_title.Text = iterator.Current.Value;
}
expression = navigator.Compile("//TimeAllowed");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
num_time_limit.Value = Convert.ToDecimal(iterator.Current.Value);
}
expression = navigator.Compile("//PassingScore");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
num_passing_score.Value = Convert.ToDecimal(iterator.Current.Value);
}
expression = navigator.Compile("//ExamCode");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
txt_exam_code.Text = iterator.Current.Value;
}
expression = navigator.Compile("//ExamInstructions");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
txt_exam_instructions.Text = iterator.Current.Value;
}
expression = navigator.Compile("//Section");
iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
TreeNode secNode = new TreeNode();
secNode.Name = "sectionNode" + (trv_explorer.Nodes[0].Nodes.Count);
secNode.Text = iterator.Current.GetAttribute("Title", "");
secNode.ImageIndex = 1;
secNode.SelectedImageIndex = 1;
secNode.ContextMenuStrip = cms_explorer;
XPathNodeIterator subIterator = iterator.Current.SelectChildren(XPathNodeType.Element);
while (subIterator.MoveNext())
{
Question question = new Question();
question.SectionTitle = iterator.Current.GetAttribute("Title", "");
question.QuestionNumber = Convert.ToInt32(subIterator.Current.GetAttribute("No", ""));
Dictionary<char, string> options = new Dictionary<char, string>();
XPathNodeIterator subIter = subIterator.Current.SelectChildren(XPathNodeType.Element);
while (subIter.MoveNext())
{
if (subIter.Current.LocalName == "Text")
{
question.QuestionText = subIter.Current.Value;
}
else if (subIter.Current.LocalName == "Image")
{
question.QuestionImagePath = subIter.Current.Value;
}
else if (subIter.Current.LocalName == "Answer")
{
question.QuestionAnswer = Convert.ToChar(subIter.Current.Value);
}
if (subIter.Current.LocalName == "Options")
{
XPathNodeIterator ite = subIter.Current.SelectChildren(XPathNodeType.Element);
while (ite.MoveNext())
{
char option;
string optionText;
string tempp = ite.Current.GetAttribute("Title", "");
option = Convert.ToChar(tempp);
optionText = ite.Current.Value;
options.Add(option, optionText);
}
question.QuestionOptions = options;
}
if (version == "1.0")
{
question.AnswerExplanation = "Version 1.0 files do not support explanations";
}
else
{
if (iterator.Current.LocalName == "AnswerExplanation")
question.AnswerExplanation = iterator.Current.Value;
}
}
rawQuestionList.Add(question);
TreeNode quesNode = new TreeNode();
quesNode.ImageIndex = 2;
quesNode.SelectedImageIndex = 2;
quesNode.ContextMenuStrip = cms_explorer;
quesNode.Text = "Question " + (secNode.Nodes.Count + 1);
quesNode.Name = "questionNode" + secNode.Nodes.Count;
secNode.Nodes.Add(quesNode);
}
trv_explorer.Nodes[0].Nodes.Add(secNode);
}
trv_explorer.ExpandAll();
closeExamToolStripMenuItem.Enabled = true;
printPreviewToolStripMenuItem.Enabled = true;
printToolStripButton.Enabled = true;
printToolStripMenuItem.Enabled = true;
savedAs = true;
AllChangesSaved = true;
}
}
/// <summary>
/// This method makes sure when the save method is called the current question is committed
/// </summary>
private void AddCurrentQuestion()
{
try
{
if (trv_explorer.SelectedNode.Name.Contains("ques"))
{
bool exists = false;
Question present = new Question();
try
{
var temp = tempExamStore.FindAll(s => s.SectionTitle == (trv_explorer.SelectedNode.Parent.Text));
present = temp.SingleOrDefault(c => c.QuestionNumber == Convert.ToInt32(trv_explorer.SelectedNode.Text.Replace("Question ", "")));
exists = tempExamStore.Contains(present);
}
catch (InvalidOperationException ex)
{
Debug.Print(ex.Message + Environment.NewLine + ex.InnerException);
}
finally
{
if (tempExamStore.Contains(present))
{
int index = tempExamStore.IndexOf(present);
tempExamStore[index].QuestionText = txt_question_text.Text;
tempExamStore[index].QuestionImagePath = pct_question_picture.ImageLocation;
try
{
tempExamStore[index].QuestionAnswer = Convert.ToChar(((OptionControl)pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter);
}
catch (InvalidOperationException)
{
tempExamStore[index].QuestionAnswer = 'A';
}
tempExamStore[index].QuestionNumber = Convert.ToInt32(trv_explorer.SelectedNode.Text.Replace("Question ", ""));
Dictionary<char, string> tempDic = new Dictionary<char, string>();
foreach (var ctrl in pan_options.Controls.OfType<OptionControl>())
{
tempDic.Add(Convert.ToChar(ctrl.OptionLetter), ctrl.OptionText);
}
tempExamStore[index].QuestionOptions = tempDic;
tempExamStore[index].SectionTitle = trv_explorer.SelectedNode.Parent.Text;
}
else
{
//save the previous question
Question ques = new Question();
try
{
ques.QuestionAnswer = Convert.ToChar(((OptionControl)pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter);
}
catch (InvalidOperationException)
{
ques.QuestionAnswer = 'A';
}
ques.QuestionImagePath = pct_question_picture.ImageLocation;
ques.QuestionNumber = Convert.ToInt32(trv_explorer.SelectedNode.Text.Replace("Question ", ""));
Dictionary<char, string> tempDic = new Dictionary<char, string>();
foreach (var ctrl in pan_options.Controls.OfType<OptionControl>())
{
tempDic.Add(Convert.ToChar(ctrl.OptionLetter), ctrl.OptionText);
}
ques.QuestionOptions = tempDic;
ques.QuestionText = txt_question_text.Text;
ques.SectionTitle = trv_explorer.SelectedNode.Parent.Text;
//add question to store
this.tempExamStore.Add(ques);
}
}
}
}
catch (NullReferenceException ex)
{
Debug.Print("Error: " + ex.Message + ", Inner Exception: " + ex.InnerException);
}
catch (ArgumentNullException ex)
{
Debug.Print("Error: " + ex.Message + ", Inner Exception: " + ex.InnerException);
}
}
private void trv_explorer_BeforeSelect(object sender, TreeViewCancelEventArgs e)
{
try
{
if (((TreeView)sender).SelectedNode.Name.Contains("ques"))
{
bool exists = false;
Question present = new Question();
try
{
var temp = tempExamStore.FindAll(s => s.SectionTitle == ((TreeView)sender).SelectedNode.Parent.Text);
present = temp.SingleOrDefault(c => c.QuestionNumber == Convert.ToInt32(((TreeView)sender).SelectedNode.Text.Replace("Question ", "")));
exists = tempExamStore.Contains(present);
}
catch (NullReferenceException ex)
{
Debug.Print(ex.Message + Environment.NewLine + ex.InnerException);
}
finally
{
if (tempExamStore.Contains(present))
{
int index = tempExamStore.IndexOf(present);
tempExamStore[index].QuestionText = txt_question_text.Text;
tempExamStore[index].QuestionImagePath = pct_question_picture.ImageLocation;
try
{
tempExamStore[index].QuestionAnswer = Convert.ToChar(((OptionControl)pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter);
}
catch (InvalidOperationException)
{
MessageBox.Show("An answer to this question has not been selected, the first option ('A') has been selected by default. Return to the question to change it","Option not selected");
tempExamStore[index].QuestionAnswer = 'A';
}
tempExamStore[index].QuestionNumber = Convert.ToInt32(((TreeView)sender).SelectedNode.Text.Replace("Question ", ""));
Dictionary<char, string> tempDic = new Dictionary<char, string>();
foreach (var ctrl in pan_options.Controls.OfType<OptionControl>())
{
tempDic.Add(Convert.ToChar(ctrl.OptionLetter), ctrl.OptionText);
}
tempExamStore[index].QuestionOptions = tempDic;
tempExamStore[index].SectionTitle = ((TreeView)sender).SelectedNode.Parent.Text;
//clear the boxes
txt_question_text.Clear();
pct_question_picture.Image = null;
pct_question_picture.ImageLocation = null;
pan_options.Controls.Clear();
}
else
{
//save the previous question
Question ques = new Question();
try
{
ques.QuestionAnswer = Convert.ToChar(((OptionControl)pan_options.Controls.OfType<OptionControl>().First<OptionControl>(p => p.IsChecked == true)).OptionLetter);
}
catch (InvalidOperationException)
{
ques.QuestionAnswer = 'A';
}
ques.QuestionImagePath = pct_question_picture.ImageLocation;
ques.QuestionNumber = Convert.ToInt32(((TreeView)sender).SelectedNode.Text.Replace("Question ", ""));
Dictionary<char, string> tempDic = new Dictionary<char, string>();
foreach (var ctrl in pan_options.Controls.OfType<OptionControl>())
{
tempDic.Add(Convert.ToChar(ctrl.OptionLetter), ctrl.OptionText);
}
ques.QuestionOptions = tempDic;
ques.QuestionText = txt_question_text.Text;
ques.SectionTitle = ((TreeView)sender).SelectedNode.Parent.Text;
//clear the boxes
txt_question_text.Clear();
pct_question_picture.Image = null;
pan_options.Controls.Clear();
RefreshInputControls();
//add question to store
this.tempExamStore.Add(ques);
}
}
}
}
catch (NullReferenceException)
{
// A necessary Evil
}
}
private void trv_explorer_AfterSelect(object sender, TreeViewEventArgs e)
{
if (((TreeView)sender).SelectedNode.Name.Contains("ques"))
{
//enable relevant options
addOptionToolStripMenuItem.Enabled = true;
newQuestionToolStripMenuItem.Enabled = false;
btn_new_question.Enabled = false;
newSectionToolStripMenuItem.Enabled = false;
btn_new_section.Enabled = false;
splcn_main_view.Panel2.Enabled = true;
editToolStripMenuItem1.Enabled = false;
previousItemToolStripMenuItem.Enabled = true;
nextItemToolStripMenuItem.Enabled = true;
//enable printing
btn_print_exam.Enabled = true;
printToolStripMenuItem.Enabled = true;
btn_print_preview.Enabled = true;
//display question
lbl_question_and_section.Text = "Section: " + ((TreeView)sender).SelectedNode.Parent.Text + ", " + ((TreeView)sender).SelectedNode.Text;
//RefreshInputControls();
try
{
bool exists = false;
Question present = new Question();
try
{
var temp = tempExamStore.FindAll(s => s.SectionTitle == ((TreeView)sender).SelectedNode.Parent.Text);
present = temp.SingleOrDefault(c => c.QuestionNumber == Convert.ToInt32(((TreeView)sender).SelectedNode.Text.Replace("Question ", "")));
exists = tempExamStore.Contains(present);
}
catch (NullReferenceException ex)
{
Debug.Print("Error: " + ex.Message + ", Inner Exception: " + ex.InnerException);
}
finally
{
if (exists)
{
txt_question_text.Text = present.QuestionText;
if (string.IsNullOrWhiteSpace(present.QuestionImagePath))
{
pct_question_picture.Image = null;
pct_question_picture.ImageLocation = null;
btn_clear_picture.Visible = false;
btn_select_picture.Visible = false;
pct_question_picture.Visible = false;
}
else
{
pct_question_picture.Image = new Bitmap(present.QuestionImagePath);
pct_question_picture.ImageLocation = present.QuestionImagePath;
btn_clear_picture.Visible = true;
btn_select_picture.Visible = true;
pct_question_picture.Visible = true;
}
foreach (var item in present.QuestionOptions)
{
OptionControl ctrl = new OptionControl();
ctrl.OptionLetter = item.Key;
ctrl.OptionText = item.Value;
if (item.Key == present.QuestionAnswer)
{
ctrl.IsChecked = true;
}
if (pan_options.Controls.Count != 0)
{
OptionControl info = (OptionControl)pan_options.Controls[pan_options.Controls.OfType<OptionControl>().Count() - 1];
ctrl.Location = new Point(info.Location.X, info.Location.Y + 35);
int num = Convert.ToInt32(info.Name.Replace("optionControl", ""));
ctrl.Name = "optionControl" + (num + 1);
}
else
{
ctrl.Location = new Point(0, 0);
ctrl.Name = "optionControl1";
}
pan_options_ControlChanged(btn_add_option, null);
pan_options.Controls.Add(ctrl);
}
}
else
{
btn_select_picture.Visible = false;
btn_clear_picture.Visible = false;
pct_question_picture.Visible = false;
}
}
}
catch (NullReferenceException ex)
{
//MessageBox.Show(ex.Message + " " + ex.InnerException + Environment.NewLine + ex.Source);
Debug.Print("Error: " + ex.Message + ", Inner Exception: " + ex.InnerException);
}
catch (ArgumentNullException ex)
{
//MessageBox.Show(ex.Message + " " + ex.InnerException + Environment.NewLine + ex.Source);
Debug.Print("Error: " + ex.Message + ", Inner Exception: " + ex.InnerException);
}
}
//enable add questions
else if (((TreeView)sender).SelectedNode.Name.Contains("secNode"))
{
splcn_main_view.Panel2.Enabled = false;
addOptionToolStripMenuItem.Enabled = false;
newQuestionToolStripMenuItem.Enabled = true;
btn_new_question.Enabled = true;
newSectionToolStripMenuItem.Enabled = false;
btn_new_section.Enabled = false;
previousItemToolStripMenuItem.Enabled = true;
nextItemToolStripMenuItem.Enabled = true;
//clear status text
lbl_question_and_section.Text = "";
//dislplay edit option
editToolStripMenuItem1.Enabled = true;
//disable printing
btn_print_exam.Enabled = false;
printToolStripMenuItem.Enabled = false;
btn_print_preview.Enabled = false;
}
//enable add sections
else if (((TreeView)sender).SelectedNode.Name.Contains("examNode"))
{
splcn_main_view.Panel2.Enabled = false;
newSectionToolStripMenuItem.Enabled = true;
addOptionToolStripMenuItem.Enabled = false;
btn_new_section.Enabled = true;
newQuestionToolStripMenuItem.Enabled = false;
btn_new_question.Enabled = false;
previousItemToolStripMenuItem.Enabled = false;
nextItemToolStripMenuItem.Enabled = false;
//display edit option
editToolStripMenuItem1.Enabled = false;
//disable printing
btn_print_exam.Enabled = false;
printToolStripMenuItem.Enabled = false;
btn_print_preview.Enabled = false;
}
else
{
splcn_main_view.Panel2.Enabled = false;
addOptionToolStripMenuItem.Enabled = false;
newQuestionToolStripMenuItem.Enabled = false;
addOptionToolStripMenuItem.Enabled = false;
btn_new_question.Enabled = false;
newSectionToolStripMenuItem.Enabled = false;
btn_new_section.Enabled = false;
//disable printing
btn_print_exam.Enabled = false;
printToolStripMenuItem.Enabled = false;
btn_print_preview.Enabled = false;
}
}
