How to get the selected item of a ListBox if it's contents are binded data? (Please read)

Question

So, I am making an application in which binds data from a WebClient to a ListBox. Thus, it is needed to understand that I did not create this data, it is from a Web API. So my goal is to be able to click on any of the items in the list box(which are binded
from a web API) and open a pop-up to display more data binded from that specific area.
Example:
The data has been loaded and I click on the 2nd item, well this item is a Metallica concert located in Russia blah blah.. ok, so I press it, it opens a pop up with more info like the date, location, etc...
Info:
I am binding the things in the lost box from and "events" statement, and I want the data in the list box in the pop up to display the selected child item, "event".
Zack Bowling

Answer 1

So are you storing that 'more info data' along with main data(i.e. that metallica concert etc.) somewhere in a List/observableCollection/database etc, if yes then probably it can be fetched directly from that collection. 
e.g.
private void listBox_Tap(object sender, System.Windows.Input.GestureEventArgs e)
var Itemobj = (listboxname.SelectedItem) as ObjectClassname; string datevalue = Itemobj.date; string location = Itemobj.location;
//so using Itemobj you can fetch the properties you want as stored in ObjectClassname.
// Here ObjectClassname is the name of class storing the properties(setter-getter) for the parsed data.
http://developer.nokia.com/community/wiki/Using_Crypto%2B%2B_library_with_Windows_Phone_8