Displaying data in Next Page based on previous Page's List Selection

programming
1

Hi,

I found the Simple navigation and the Passing data between pages tutorials helpful. I tried to create a list in one page and load the next page values based on the selection.

Here is my XML structure:
<Class>
<Classbook>
<Name>Database </Name>
<Text>XML XAML </Text>
<Reference>SQL SQLSErver </Reference>
</Classbook>
<Classbook>
<Name>Programming </Name>
<Text>VC# C# </Text>
<Reference>C++ VC++ </Reference>
</Classbook>
</Class>

I have a panorama page with a listbox which displays the class name but I want to display the booktext and reference in the next page in textblock . here is my code:
XDocument XMLFile=XDocument.Load(“Class.xml”);
// Set the data context of the listbox control to the sample data

var classes = from query in XMLFile.Descendants("Classbook")     

select new Class {  
    Name = (string)query.Element("Name")    
};    

MainListBox.ItemsSource = classes;  
this.Loaded += new RoutedEventHandler(MainPage_Loaded);

}
// Handle selection changed on ListBox

private void MainListBox_SelectionChanged(object sender, SelectionChangedEventArgs e) {
// If selected index is -1 (no selection) do nothing
if (MainListBox.SelectedIndex == -1) return;
// Navigate to the new page
NavigationService.Navigate(new Uri("/DetailsPage.xaml?Class=" + Name, UriKind.Relative));
// Reset selected index to -1 (no selection)
MainListBox.SelectedIndex = -1; }

The second Page has this:

XDocument XMLFile = XDocument.Load(“Class.xml”);
//Page Title is a textblock displaying Class Name
PageTitle.Text = Name;
var Textbook= from query in XMLFile.Descendants(“Class”)
where query.Descendants(“Name”)=Name
select new Book {

      Textbook =(string)query.Element("Text") 
}; 
BookTitle.Text= Textbook; 
var Reference = from query in XMLFile.Descendants("Book")  
    where query.Descendants("Name")=Name 
select new Book {  
    Reference = (string)query.Element("Reference")  
};  
TextBlock1.Text = Reference;

Nothing is seen in the second page. Not even the page title. What am I doing wrong? Is the code correct? I really appreciate your help.