Demo information

4 posts, 0 answers
  1. Waleed Seada
    Waleed Seada avatar
    241 posts
    Member since:
    May 2006

    Posted 06 Feb 2011 Link to this post

    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
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  3. John
    John avatar
    34 posts
    Member since:
    Oct 2010

    Posted 16 Apr 2011 Link to this post

    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()
                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.

  4. Vlad
    Vlad avatar
    11100 posts

    Posted 18 Apr 2011 Link to this post

    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.

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