public void GenPrev()
{
QAInstance instance = QADictionary.BackToPreviousQuestion();
if (instance != null)
{
AnswerTB.Text = instance.Answer;
QuestionTB.Text = instance.Question;
}
}
/// <summary>
/// Create the next question in the user interface in case the XML file exists.
/// </summary>
public void GenNext()
{
QAInstance instance = QADictionary.GenerateNextQuestion();
if (instance == null)
{
MessageBox.Show($"No records found in the XML file.");
}
else
{
AnswerTB.Text = instance.Answer;
QuestionTB.Text = instance.Question;
}
}
/// <summary>
/// Updating existing record in XML.
/// </summary>
/// <param name="instanceOld"></param>
/// <param name="instanceUpdated"></param>
public void UpdateExisting(QAInstance instanceOld, QAInstance instanceUpdated)
{
XDocument xdoc = XDocument.Load(filePath);
XElement root = xdoc.Element("Questions");
foreach (XElement xe in root.Elements("question").ToList())
{
if (xe.Attribute("qtext").Value == instanceOld.Question)
{
xe.Attribute("qtext").Value = instanceUpdated.Question;
xe.Attribute("qanswer").Value = instanceUpdated.Answer;
}
}
xdoc.Save(filePath);
}
/// <summary>
/// Adding new record to XML.
/// </summary>
/// <param name="instance"></param>
public void Increment(QAInstance instance)
{
if (String.IsNullOrWhiteSpace(instance.Answer) || String.IsNullOrWhiteSpace(instance.Question) ||
instance.Question.Length < 5 || instance.Answer.Length < 5)
{
System.Windows.MessageBox.Show("Args is empty or shorter then 5 symbols");
}
else
{
XDocument xdoc = XDocument.Load(filePath);
xdoc.Elements("Questions").First().Add(
new XElement("question", new XAttribute("qtext", instance.Question),
new XAttribute("qanswer", instance.Answer)));
xdoc.Save(filePath);
}
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
if (EditMode) // Disabling UI edit mode
{
if (MessageBox.Show("Save changes?", "Apply?", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes)
{
QAInstance instance = new QAInstance(QuestionTB.Text, AnswerTB.Text);
new XMLWorker(System.IO.Directory.GetCurrentDirectory() + Properties.Settings.Default.XMLname).UpdateExisting(
new QAInstance(QuestionValue, AnswerValue), new QAInstance(QuestionTB.Text, AnswerTB.Text));
}
else
{
QuestionTB.Text = QuestionValue;
AnswerTB.Text = AnswerValue;
}
EditMode = false;
AnswerTB.Background = Brushes.Transparent;
QuestionTB.Background = Brushes.Transparent;
EditButton.Content = "Edit";
QuestionValue = null;
AnswerValue = null;
QADictionary.ReloadDictionary();
ControlEnableInvert(new FrameworkElement[] { AddButton, Next, Previous });
AnswerTB.IsReadOnly = true;
QuestionTB.IsReadOnly = true;
}
else // Edit mode in UI
{
AnswerValue = AnswerTB.Text;
QuestionValue = QuestionTB.Text;
EditMode = true;
EditButton.Content = "Save";
AnswerTB.Background = Brushes.WhiteSmoke;
QuestionTB.Background = Brushes.WhiteSmoke;
ControlEnableInvert(new FrameworkElement[] { AddButton, Next, Previous });
AnswerTB.IsReadOnly = false;
QuestionTB.IsReadOnly = false;
}
}
