Product Details This is a commercial (non-free) product that users can download and use for free for 45 days in trial mode. Xceed Ultimate ListBox for Silverlight is the perfect drop-in replacement for the standard Silverlight listbox that behaves the way a listbox should! Thanks to an API designed to allow it to fit in to any project using the stock Silverlight listbox, you'll be up and running in no time. But it gives you so much more than the standard control! Xceed's listbox delivers a background, remote data retrieval engine that only gets records currently visible in the viewport (data virtualization), or those immediately preceding or following the current ones (active/passive pre-fetching) so they are ready when the end-user scrolls. This greatly reduces the amount of data transferred, making remote data access feel fast like no other listbox can do. Background (asynchronous) retrieval keeps the UI responsive, always. What's more, it does everything automatically! Powerful grouping with sticky header support helps make data easy to handle, and an innovative group navigation control that provides previous/next group commands and index entry buttons lets end-users go quickly to the item they're looking for. A search box further assists end-users by giving them access to the filtering capabilities you define. And fluid smooth scrolling and insert/delete animations, which increase perceived performance by masking network lag when the listbox is waiting for slow data sources, help you create an incredible UI experience. Xceed Ultimate ListBox for Silverlight also supports multiple views (a traditional vertical-scrolling list, as well as a horizontal version, and "path" views, which let you place items along any geometric path in the viewport, for example, creating a carousel view). Six beautiful themes let the listbox match the style of your application, whatever it may be. And the listbox provides fully configurable drag-and-drop operations. Designed from the ground up for Silverlight 4 to take full advantage of Microsoft’s latest development platform, Xceed Ultimate ListBox for Silverlight uses the same ground-breaking data retrieval engine as Xceed DataGrid for Silverlight, which provides automatic data virtualization with WCF Data Services / OData or WCF RIA Services. The product comes with full documentation that fully integrates into Visual Studio for quick access. It also provides C# and VB.NET sample applications that make getting started with it easy. Xceed Ultimate ListBox for Silverlight is through a subscription that delivers much more than a perpetual license for versions received during the subscription. The subscription also provides an entire year of these great services: expert, priority support and access to new versions, new features, and bug fixes. Additional years can be added at a discounted price at the time of purchase or before the subscription expires; a new subscription is required after it has expired. Choosing the Blueprint subscription adds the full C# and XAML source. Xceed's products can be tried out with a fully functional 45-day trial and come with a 60-day money-back guarantee. | 
