UWP Offset GridView Scrollbar - xaml

Question

I am making a Gridview that scrolls behind a title element (which is semi transparent to show the items being scrolled behind it). To do this, I have layered the Grid containing the title and the GridView by placing them both as children in the same Grid.
<Grid>
<GridView>
<!-- Stuff -->
<GridView>
<Grid Height="100">
<!-- Title Content here -->
</Grid>
</Grid>
This works fine, but causes the GridView to display elements initially behind the title. To fix this, I offset the ItemsWrapGrid in the GridView:
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid Name="ItemsWrapGrid"
Margin="0,100,0,0"
Orientation="Horizontal"
HorizontalAlignment="Center"></ItemsWrapGrid>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
Now the items start as if they are below the title content, and scroll underneath it.
The only remaining problem is the scrollbar for the GridView. The scrollbar still goes to the top of the parent Grid, which means it goes behind the title, even though the items in the GridView themselves begin below the title. This is particularly an issue when there are enough items in the GridView (rows) to cause the scrollbar to be small enough that it is entirely behind the title.
Is there a way to offset the scrollbar similar to the GridView items? Is this the wrong approach?

Answer 1

UWP Offset GridView Scrollbar
For your requirement, you could use VisualTreeHelper to get VerticalScrollBar element, then set Margin = 0,100,0,0 in the GridView load event handler. For detail steps please refer the following code.
public static DependencyObject MyFindGridViewChildByName(DependencyObject parant, string ControlName)
{
int count = VisualTreeHelper.GetChildrenCount(parant);
for (int i = 0; i < count; i++)
{
var MyChild = VisualTreeHelper.GetChild(parant, i);
if (MyChild is FrameworkElement && ((FrameworkElement)MyChild).Name == ControlName)
return MyChild;
var FindResult = MyFindGridViewChildByName(MyChild, ControlName);
if (FindResult != null)
return FindResult;
}
return null;
}
private void TestGridView_Loaded(object sender, RoutedEventArgs e)
{
var scrollBar = MyFindGridViewChildByName(TestGridView, "VerticalScrollBar");
scrollBar.SetValue(MarginProperty, new Thickness(0, 100, 0, 0));
}