Demo information

[Waleed Seada]

Dear All,
I was looking into the new Virtualization demo specificaly at this url: http://localhost:6519/Default.aspx#DataVirtualization/FirstLook
I can't resolve the DataContext = new ExamplesDataContext(); where does ExamplesDataContext() can from !!

How about the implementation of MVVM using Virtualization. a sample will be great ...

By the way; great break through from telerik (as usuall)
Best regards
Waleed

[Waleed Seada]

Found a very useful start here : http://blogs.telerik.com/vladimirenchev/posts/10-10-20/data_virtualization_for_your_silverlight_and_wpf_applications.aspx

[John]

Greetings,
I followed your link and got the demo.  Looking through it, it is using DomainService to obtain the data.  On the other hand, I am using WCF to obtain the data.  Hence, when reading this block of code, I truly have no clue how it works.

using System.Linq;
using System.Windows.Controls;
using Telerik.Windows.Data;
using SilverlightApplication1.Web;
using System.ServiceModel.DomainServices.Client;

namespace SilverlightApplication1
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();

            var context = new NorthwindDomainContext();
            var query = context.GetOrder_DetailsQuery().OrderBy(o => o.OrderID);
            query.IncludeTotalCount = true;

            var view = new VirtualQueryableCollectionView() { LoadSize = 10, VirtualItemCount = 100 };
            view.ItemsLoading += (s, e) =>
            {
                context.Load<Order_Detail>(query.Skip(e.StartIndex).Take(e.ItemCount)).Completed += (sender, args) =>
               {
                   var lo = (LoadOperation)sender;
                   if (lo.TotalEntityCount != -1 && lo.TotalEntityCount != view.VirtualItemCount)
                   {
                       view.VirtualItemCount = lo.TotalEntityCount;
                   }

                   view.Load(e.StartIndex, lo.Entities);
               };
            };

            DataContext = view;
        }
    }
}

Is there any sample codes for WCF that would do the similar action?  

Any help is extremely helpful.
Thanks

[Vlad]

Hello John,

 Last week I've made small demo on how to this with plain web service. You need to pass some info to your service method similar to the attached project.

Regards,
Vlad
the Telerik team