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[Solved] PaginationControl with SliveView raises an exception when deleting item from source list

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PaginationControl

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Alexey asked on 12 Nov 2014, 06:51 PM

I have SlideView and PaginationControl.

<telerikPrimitives:RadSlideView Grid.Row="1"

Name="slideView"

ItemsSource="{Binding TransactionImages}"

Margin="{StaticResource PhoneMargin}">

<telerikPrimitives:RadSlideView.ItemTemplate>

<DataTemplate>

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

</Grid.RowDefinitions>

<Image Source="{Binding Image, Converter={StaticResource imageConverter}}" Stretch="Uniform" Tap="Image_Tap"/>

<TextBlock Grid.Row="1" Text="{Binding Note}" TextWrapping="Wrap"/>

</Grid>

</DataTemplate>

</telerikPrimitives:RadSlideView.ItemTemplate>

</telerikPrimitives:RadSlideView>

<telerikPrimitives:RadPaginationControl Grid.Row="2"

PageProvider="{Binding ElementName=slideView}"

DisplayMode="Thumbnails"

NavigationMode="Direct">

<telerikPrimitives:RadPaginationControl.ItemTemplate>

<DataTemplate>

<Image Source="{Binding Image, Converter={StaticResource imageConverter}, ConverterParameter=90}" Width="90" Height="90" Opacity="0.6"/>

</DataTemplate>

</telerikPrimitives:RadPaginationControl.ItemTemplate>

<telerikPrimitives:RadPaginationControl.CurrentItemTemplate>

<DataTemplate>

<Border BorderThickness="3" BorderBrush="{StaticResource PhoneAccentBrush}">

<Image Source="{Binding Image, Converter={StaticResource imageConverter}, ConverterParameter=90}" Width="90" Height="90"/>

</Border>

</DataTemplate>

</telerikPrimitives:RadPaginationControl.CurrentItemTemplate>

<telerikPrimitives:RadPaginationControl.ThumbnailListStyle>

<Style TargetType="telerikPagination:PaginationThumbnailListControl">

<Setter Property="HorizontalAlignment" Value="Center"/>

<Setter Property="VerticalAlignment" Value="Bottom"/>

<Setter Property="Margin" Value="12,24"/>

</Style>

</telerikPrimitives:RadPaginationControl.ThumbnailListStyle>

</telerikPrimitives:RadPaginationControl>

But when I'm deleting item from binded list which is ObservableCollection, I'm getting an exception

{System.NullReferenceException: Object reference not set to an instance of an object.

at Telerik.Windows.Controls.RadDataBoundListBox.SynchCheckedItemsOnItemsChanged(NotifyCollectionChangedEventArgs args)

at Telerik.Windows.Controls.RadDataBoundListBox.OnItemsChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Controls.Pagination.PaginationThumbnailListControl.OnOwnerSourceCollectionChanged(NotifyCollectionChangedEventArgs e)

at Telerik.Windows.Controls.RadPaginationControl.OnSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)

at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)

at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

at System.Collections.ObjectModel.ObservableCollection`1.RemoveItem(Int32 index)

at System.Collections.ObjectModel.Collection`1.Remove(T item)

at MoneyWallet.View.TransactionImagesEditPage.<DeleteImage_Click>d__2.MoveNext()}

3 Answers, 1 is accepted

answered on 13 Nov 2014, 07:04 AM

slideviewandpaginationcontrol.png

Here is an example. Just change extension from PNG to ZIP