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POProgressBar behaves incorrectly when enclosed in LongListSelector
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  1. POProgressBar behaves incorrectly when enclosed in LongListSelector
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    copied!<p>In my WP8 app I use Background Transfer Sevice and <code>LongListSelector</code> with <code>ProgressBar</code> as it's <code>DataTemplate</code> to display items download progress to user. The problem is that <code>ProgressBar</code> does not show real progress but keeps jumping back and forth. </p> <p>Here's my XAML. <code>LongListSelector</code> periodically recieves a list of <code>BackgroundTransferRequest</code>'s and uses <code>ProgressBar</code> to display them:</p> <pre><code>&lt;phone:LongListSelector IsGroupingEnabled="False" x:Name="Views"&gt; &lt;phone:LongListSelector.ListHeader&gt; &lt;StackPanel Style="{StaticResource M20}"&gt; &lt;controls:TextTile Txt="Cancel downloads" Sign="x" Tap="CancelDownloads" /&gt; &lt;/StackPanel&gt; &lt;/phone:LongListSelector.ListHeader&gt; &lt;phone:LongListSelector.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;ProgressBar Maximum="{Binding TotalBytesToReceive}" Value="{Binding BytesReceived}" Minimum="0" /&gt; &lt;/DataTemplate&gt; &lt;/phone:LongListSelector.ItemTemplate&gt; &lt;/phone:LongListSelector&gt; </code></pre> <p><code>LongListSelector</code> gets updated periodically from code behind class: </p> <pre><code>Views.ItemsSource = BackgroundTransferService.Requests.ToList() </code></pre> <p>This issue happens in <code>LongListSelector</code> only in case if more than one item is displayed. Everything works fine If I try to use <code>ListBox</code> for example. Why is this thing happening and what should I do to fix it?</p>
 

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