Databinding for RadCycleHubTile

[Ashok]

Hi I'm doing simple phone contact binding to RadCycleHubTile in a MVVM way. But is throwing exception as follows -

   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at System.Collections.ObjectModel.Collection`1.System.Collections.IList.get_Item(Int32 index)
   at Telerik.Windows.Controls.EnumerableExtensions.ElementAt(IEnumerable enumerable, Int32 index)
   at Telerik.Windows.Controls.RadCycleHubTile.GetRandomItem()
   at Telerik.Windows.Controls.RadCycleHubTile.GetItem(Boolean random)
   at Telerik.Windows.Controls.RadCycleHubTile.OnFullyInitialized()
   at Telerik.Windows.Controls.HubTileBase.OnLoaded(Object sender, RoutedEventArgs e)
   at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)

Below are my binding details
Namespace -  xmlns:tp="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Primitives"

 <tp:RadCycleHubTile ItemsSource="{Binding Items}" x:Name="tileAll" Title="All" Margin="6"  Background="Red"
                Width="450" IsFrozen="True"
                Height="150" >
                <tp:RadCycleHubTile.ItemTemplate>
                    <DataTemplate>
                        <Grid Margin="0, 12, 0, 0">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="140"/>
                            </Grid.ColumnDefinitions>
                          
                            <TextBlock Text="{Binding DisplayName}" Style="{StaticResource PhoneTextLargeStyle}"
                                           TextWrapping="Wrap"
                                           Margin="12, 0, 0, 0"
                                           Grid.Column="1"
                                           VerticalAlignment="Center"
                                           HorizontalAlignment="Left"/>
                        </Grid>
                    </DataTemplate>
                </tp:RadCycleHubTile.ItemTemplate>
            </tp:RadCycleHubTile>

I have singletone MainViewModel

  public class MainViewModel : INotifyPropertyChanged
    {
        public MainViewModel()
        {
            Items = new ObservableCollection<Contact>();
        }

        private ObservableCollection<Contact> _items = new ObservableCollection<Contact>();
   
        public ObservableCollection<Contact> Items
        {
            get
            {
                return _items;
            }
            set
            {
                if (value != _items)
                {
                    _items = value;
                    NotifyPropertyChanged("Items");
                }
            }
        }

        public bool IsDataLoaded
        {
            get;
            private set;
        }
    
        public void LoadData()
        {
            Contacts c = new Contacts();

            c.SearchCompleted += (s, e) =>
            {
                Items = new ObservableCollection<Contact>(e.Results);
            };
            c.SearchAsync(string.Empty, FilterKind.None, null);

            this.IsDataLoaded = true;
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (null != handler)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

How should I handle this?

[Kiril Stanoev]

Hello Ashok,

Thank you for contacting us. I was unable to reproduce the issue. Could you please take a look at the attached files and let me know if I'm missing anything. I'd be glad to assist you further.  

Regards,
Kiril Stanoev
Telerik