WP7 Toolkit Update Removed GetItemsInView() from the LongListSelector

Question

With the latest update to the Windows Phone Toolkit they have overhauled the internals of the LongListSelector for the Mango release. One of the changes was removing suppor

Answer 1

The Link/Unlink approach does not work at all for restoring the scroll position. Even if you setup the collection, you don't know if you are scrolling up or down, and the size of the collection would vary depending on the BufferSize property of the LongListSelector.

The FindScrollViewer solution in kvakulo's answer, however, works.

If someone needs the VB.Net version of this code:

Friend Function FindScrollViewer(parent As DependencyObject) As ScrollViewer

    Dim childCount = VisualTreeHelper.GetChildrenCount(parent)

    For i As Int32 = 0 To childCount - 1

        Dim elt = VisualTreeHelper.GetChild(parent, i)

        If elt.GetType Is GetType(ScrollViewer) Then Return CType(elt, ScrollViewer)

        Dim result = FindScrollViewer(elt)
        If result IsNot Nothing Then Return result

    Next

    Return Nothing

End Function