LongListSelector selecteditem - vb.net

Question

I have a LongListSelector in an .xaml and I am able to fill it by binding to a an ItemSource when the source is filled by a DataContext using a single table from my SQL Server CE database like this:
Dim row = (From rows In db.Hub
Order By rows.HubID Descending
Select rows).ToList()
Me.MainLongListSelector.ItemsSource = row
I am thus able to get the ID of the selected item as follows:
HubID = CType(MainLongListSelector.SelectedItem, Hub).HubID
I am also able to bind to a 'query' DataSource as follows:
Dim row = (From ac In db.Activity
Join at In db.ActivityType On ac.ActivityTypeID Equals at.ActivityTypeID
Select New With {.ID = ac.ActivityID,
.Title = ac.Activity1}).ToList()
Me.MainLongListSelector.ItemsSource = row
however, since this is not referring to a specific table in the DataContext, I cannot get the ID using the above code, ie:
Dim ActID = CType(MainLongListSelector.SelectedItem, Activity).ActivityID '- returns nothing
How should I get the value(s) of selectedItem in this case?
NB: I have created the anonymous fields (.ID and .Title) because those are the names I have bound in the xaml, so the LongListSelected gets populated without writing extra code.
Thanks

Answer 1

Phew!!
I discovered that two things:
this HubID = CType(MainLongListSelector.SelectedItem, Hub).HubID is calling a List (Of DataContext), while in the second scenario above I am using a List (Of Anonymous). So I searched for List (Of Anonymous) and this came up!
I now know I can create a class for List (Of Anonymous) and properly name its properties, thus make it available outside its methods, like in my 'query' question above.
So the answer is I created the class for my anonymous list, declared its properties
Public Class AnonList
Private _id As Integer
Public Property ID() As Integer
Get
Return _id
End Get
Set(ByVal value As Integer)
_id = value
End Set
End Property
Private _title As String
Public Property Title() As String
Get
Return _title
End Get
Set(ByVal value As String)
_title = value
End Set
End Property
Private _desc As String
Public Property Desc() As String
Get
Return _desc
End Get
Set(ByVal value As String)
_desc = value
End Set
End Property
End Class
and therefore assigned them to the ItemSource values,
Select New AnonList With {.ID = ac.ActivityID,
thus being able to get the SelectedItem values as required:
ActivityID = CType(MainLongListSelector.SelectedItem, AnonList).ID
Took a bit of determination to figure that out!