Question

I have ItemsControl which is bound and creates multiple Polylines, one for each data item.

Currently I get “stack” like display – First Polyline at the top, below is second, below is third, and so on…

How can I make Polylines appear on the top of each other?

Answer 1

You need to change the ItemsPanel of your ItemsControl (which is by default a StackPanel that’s why you get the “stack” like display) to another Panel which allows it’s Children to be placed on each other like the Canvas or the Grid:

<ItemsControl>
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <Canvas/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
</ItemsControl>