THE REAL Answer is :
* get the ScrollViewer of the ListView.
* ScrollViewer.VerticalOffset is the index of first shown item.
* ScrollViewer.ViewportHeight is the number of items shown.
To get the ScrollViewer, you will need a function,
FindDescendant(FrameworkElement, Type) that will search
within the childs of the
ListView. Call it after Window was loaded.
Code in VB.Net and in C# :
Public Function FindDescendant(ByVal MyElementToSeek As FrameworkElement, _
ByVal TypeToFind As Type) As FrameworkElement
If MyElementToSeek Is Nothing Then Return Nothing
If MyElementToSeek.GetType() = TypeToFind Then Return MyElementToSeek
For i = 0 To VisualTreeHelper.GetChildrenCount(MyElementToSeek) - 1
Dim OneChild = TryCast(VisualTreeHelper.GetChild(MyElementToSeek, i), FrameworkElement)
Dim Result = FindDescendant(OneChild, TypeToFind)
If Result IsNot Nothing Then Return Result
Next
Return Nothing
End Function
.
public FrameworkElement FindDescendant(FrameworkElement MyElementToSeek,
Type TypeToFind)
{
if (MyElementToSeek == null) return null;
if (MyElementToSeek.GetType() == TypeToFind) return MyElementToSeek;
for (i = 0;
(i<= (VisualTreeHelper.GetChildrenCount(MyElementToSeek) - 1)); i++)
{
object OneChild = TryCast(VisualTreeHelper.GetChild(MyElementToSeek, i),
FrameworkElement);
object Result = FindDescendant(OneChild, TypeToFind);
if (Result) return Result;
}
return null;
}
}
' MyScrollViewer = FindDescendant(MyListView, ScrollViewer)
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