Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Windows Phone 7 ItemsControl Virtualization using VirtualizingStackPanel in Silverlight

DZone's Guide to

Windows Phone 7 ItemsControl Virtualization using VirtualizingStackPanel in Silverlight

· Mobile Zone
Free Resource

Launching an app doesn’t need to be daunting. Whether you’re just getting started or need a refresher on mobile app testing best practices, this guide is your resource! Brought to you in partnership with Perfecto

Usually I am using ListBox control in my Windows Phone 7 Silverlight applications to display a scrollable list of child controls. ListBox offers UI virtualization, that means that UI is loading ListBox items on demand to increase the performance and reduce memory allocation. One of the main keys to that is in using VirtualizingStackPanel as ItemsPanel Template for ListBox control.

Lately in one of my Windows Phone 7 projects I had to replace ListBox with ItemsControl, but ItemsControl does not offer UI virtualization for child items by default, so I had to add the same VirtualizingStackPanel to ItemsPanelTemplate element. Also I have modified the Template element to be able to add and access ScrollViewer for ItemsControl.

<ItemsControl>
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <VirtualizingStackPanel />
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.Template>
        <ControlTemplate TargetType="ItemsControl">
                <ScrollViewer>
                    <ItemsPresenter/>
                </ScrollViewer>
        </ControlTemplate>
    </ItemsControl.Template>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <!-- place your controls here-->
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

 

Keep up with the latest DevTest Jargon with the latest Mobile DevTest Dictionary. Brought to you in partnership with Perfecto.

Topics:

Opinions expressed by DZone contributors are their own.

THE DZONE NEWSLETTER

Dev Resources & Solutions Straight to Your Inbox

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

X

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}