c# – ListBox VirtualizingStackPanel.VirtualizationMode =“

我一直在处理我正在研究的 Windows Phone 7.5应用程序中的一些性能问题.我有一个使用VirtualizationMode =“Recycling”和DataTemplate的ListBox.除了性能不佳外,它似乎工作正常.在进行一些性能分析时,我正在看,当我滚动列表时,正在使用62％的CPU正在创建一个自定义用户控件的新实例,我已放置在DataTemplate中.我理解VirtualizationMode =“Recycling”的重点是重用ListBox中的所有UIElements而不需要创建新实例或处理旧实例,所以我希望这正是那种不应该发生的事情.

这是相关的XAML：

<ListBox ItemsSource="{Binding EpisodeRows}" toolkit:TiltEffect.SuppressTilt="True" Margin="12,0" VirtualizingStackPanel.VirtualizationMode="Recycling">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <Grid VerticalAlignment="Top" Height="111" VirtualizingStackPanel.VirtualizationMode="Recycling" >
                <StackPanel Orientation="Horizontal" Visibility="{Binding TilesVisibility}">
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_1}" ScoreText="{Binding ScoreText_1}" Star1Visibility="{Binding Star1Vi
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_2}" ScoreText="{Binding ScoreText_2}" Star1Visibility="{Binding Star1Vi
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_3}" ScoreText="{Binding ScoreText_3}" Star1Visibility="{Binding Star1Vi
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_4}" ScoreText="{Binding ScoreText_4}" Star1Visibility="{Binding Star1Vi
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_5}" ScoreText="{Binding ScoreText_5}" Star1Visibility="{Binding Star1Vi
                    <landerGame:LevelTileUserControl PartText="{Binding PartText_6}" ScoreText="{Binding ScoreText_6}" Star1Visibility="{Binding Star1Vi
                </StackPanel>
                <TextBlock VerticalAlignment="Top" Text="{Binding EpisodeTitleText}" Style="{StaticResource PhoneTextExtraLargeStyle}" Margin="0,5" 
            </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

这是滚动列表时我的性能分析结果的屏幕截图：

这是列表的样子(这是游戏的级别选择)：

我环顾四周,发现任何解决VirtualizationMode =“回收”的文章似乎无法正常工作.在这一点上,任何见解都将是最受欢迎的.

编辑：我已经上传了这个项目的完整相关代码,任何人都可以在这里自己尝试：http://maketag.net/landerGame.rar

<controls:Pivot Title="LANDER GAME">
    <!--Pivot item one-->
    <controls:PivotItem Header="Episodes">
        <ScrollViewer>
            <ItemsControl ItemsSource="{Binding EpisodeRows}" toolkit:TiltEffect.SuppressTilt="True" Margin="12,0">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <Grid VerticalAlignment="Top" Height="111" >
                            <StackPanel Orientation="Horizontal" Visibility="{Binding TilesVisibility}">
                                ...
                            </StackPanel>
                            <TextBlock VerticalAlignment="Top" Text="{Binding EpisodeTitleText}" Style="{StaticResource PhoneTextExtraLargeStyle}" Margin="0,5" Visibility="{Binding TitleVisibility}" />
                        </Grid>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </ScrollViewer>
    </controls:PivotItem>