<phone:LongListSelector
Margin="0,0,-12,0"
ItemsSource="{Binding CustomSounds.Items}"
LayoutMode="Grid"
GridCellSize="150,150"
ItemTemplate="{StaticResource CustomSoundTileDataTemplate}"
SelectionChanged="LongListSelector_SelectionChanged"
x:Name="CustomSoundLongListSelector"
/>
我有一个这样的 LongListSelector,现在我在 CustomSounds.Items 中更改了一些内容并想重新加载它。我怎么能在文件后面的代码中做到这一点,CustomSoundLongListSelector.ItemSource = ...