public Question(Question item)
{
this.choices = new List<Choice>(item.choices);
this.question = item.question;
this.questionNum = item.questionNum;
//loadData();
}
private void onNextButtonClick(object sender, RoutedEventArgs e)
{
if (curIndex + 1 < 20)
_curQuestion = this._questions[++curIndex];
if(curIndex==19)
NextBtn.Visibility = Visibility.Collapsed;
LastBtn.Visibility = Visibility.Visible;
notifyChangeAll();
}
private void onLastButtionClick(object sender, RoutedEventArgs e)
{
if (curIndex - 1 >= 0)
_curQuestion = this._questions[--curIndex];
if(curIndex==0)
LastBtn.Visibility = Visibility.Collapsed;
NextBtn.Visibility = Visibility.Visible;
notifyChangeAll();
}