Question

I need to select an item from a list box that contains objects of my class. Here is my code:

the load event:

  private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
  {
      XDocument loadedData = XDocument.Load("file.xml");
      var data = from query in loadedData.Descendants("element")
                 select new myClass
                 {
                     First = (string)query.Element("first"),
                     Second = (string) query.Element("second")
                 };
      List<myClass> d = data.ToList<myClass>();
      myList = d; 
      myListBox.ItemsSource = data;            
  }

and then my button which is supposed to change the selected Item:

  private void button1_Click(object sender, RoutedEventArgs e)
  {
      myListBox.SelectedItem = myList[100];
  }

am I doing something wrong here?

Answer 1

myList isn’t the collection you’ve bound to the list.
Either make d a wider scoped variable and refer to that in button1_click
or
store data in myList rather than a copy of it.