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我有一个DataTemplate从服务器API中加载了很多缩略图。加载图像时显示指示器
<phone:LongListSelector x:Name="lls_PhotoHub" Margin="0,10,0,0" LayoutMode="Grid" ItemsSource="{Binding Media}" GridCellSize="106,106">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<Image Width="100" Height="100" Source="{Binding Thumb}" />
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
有没有办法显示“indiator”,拇指还在下载?