WP8如何让listPicker“推开”其他UI元素？

Question

我一直在努力让listPicker“推开”其他UI元素，以便透明背景不影响内部的模糊性。我认为把它放在一个简单的堆栈面板内，或者甚至是一个网格都可以实现，但我似乎无法弄清楚。下面是我想这主要适用于XAML：

<phone:PivotItem Header="Brew"> 
      <phone:PivotItem.Foreground> 
       <ImageBrush Stretch="Fill"/> 
      </phone:PivotItem.Foreground> 
      <ScrollViewer x:Name="ContentPanel" Margin="12,0,12,0" Grid.Row="1" > 
       <Grid Height="693"> 
        <Rectangle x:Name="derivedQuantityRect" Fill="#FF5C97BF" HorizontalAlignment="Left" Height="52" Margin="2,233,0,0" Stroke="#FF162E3E" VerticalAlignment="Top" Width="160" StrokeThickness="3"/> 
        <TextBox x:Name="quantityInput" HorizontalAlignment="Left" Height="81" Margin="-11,124,0,0" TextWrapping="Wrap" Text="0" VerticalAlignment="Top" Width="189" Background="#FF5C97BF" BorderBrush="#FF162E3E" Foreground="Black" LostFocus="quantityInputLostFocus" InputScope="Number" GotFocus="quantityInputGotFocus" FontSize="32"/> 
        <TextBlock x:Name="quantityInputPrompt" HorizontalAlignment="Left" Margin="1,105,0,0" TextWrapping="Wrap" Text="Amount of Water:" VerticalAlignment="Top" Foreground="#FFDC9A57"/> 
        <TextBlock x:Name="unitPrompt" HorizontalAlignment="Left" Margin="182,106,0,0" TextWrapping="Wrap" Text="Unit:" VerticalAlignment="Top" Foreground="#FFDC9A57"/> 
        <TextBlock x:Name="quantityTypePrompt" HorizontalAlignment="Left" Margin="180,2,0,0" TextWrapping="Wrap" Text="Type:" VerticalAlignment="Top" Foreground="#FFDC9A57"/> 
        <TextBlock x:Name="info" HorizontalAlignment="Left" Margin="4,310,0,0" TextWrapping="Wrap" Text="1.28% TDS, 19.2% Extraction Yield" VerticalAlignment="Top" Foreground="#FFC78C4F" FontSize="18.667" Tap="infoTap"/> 
        <TextBlock x:Name="quantityOutputPrompt" HorizontalAlignment="Left" Margin="4,206,0,0" TextWrapping="Wrap" Text="Derived Quantity: " VerticalAlignment="Top" Foreground="#FFDC9A57"/> 
        <TextBlock x:Name="quantityOutput" HorizontalAlignment="Left" Margin="9,236,0,0" TextWrapping="Wrap" Text="0" VerticalAlignment="Top" Foreground="White" FontSize="32"/> 
        <TextBlock x:Name="derivedUnitPrompt" HorizontalAlignment="Left" Margin="183,205,0,0" TextWrapping="Wrap" Text="Unit:" VerticalAlignment="Top" Foreground="#FFDC9A57"/> 
        <TextBlock x:Name="test" HorizontalAlignment="Left" Margin="246,-110,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/> 
        <TextBlock x:Name="brewMethodPrompt" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Brew Method:" VerticalAlignment="Top" Foreground="#FFC78C4F" FontSize="20" Tap="brewMethodPromptTap"/> 
        <toolkit:ListPicker x:Name="brewMethodList" HorizontalAlignment="Left" Margin="-2,24,0,0" VerticalAlignment="Top" Height="127" Width="164" BorderBrush="#FF162E3E" Foreground="Black" SelectionChanged="brewMethodSelectionChange" LostFocus="quantityInputLostFocus" Background="#FF5C97BF" /> 
        <Button x:Name="resetButton" Content="Reset Values" HorizontalAlignment="Left" Margin="-11,343,0,0" VerticalAlignment="Top" BorderBrush="#FF3B779F" Foreground="#FFC78C4F" Click="resetButtonClick"/> 
        <UI:AdControl HorizontalAlignment="Left" Height="80" Margin="-23,480,-25,0" VerticalAlignment="Top" Width="480" ApplicationId="d34f521d-289f-4d8f-9e98-89cc1df4c40c" AdUnitId="10140379"/> 
        <toolkit:ListPicker x:Name="derivedUnitList" HorizontalAlignment="Left" Margin="179,225,0,0" VerticalAlignment="Top" Height="327" Width="64" Background="#FF5C97BF" BorderBrush="#FF162E3E" Foreground="Black" SelectionChanged="unitListSelectionChange" MouseEnter="unitListMouseEnter"/> 
        <toolkit:ListPicker x:Name="unitList" HorizontalAlignment="Left" Margin="180,128,0,0" VerticalAlignment="Top" Height="327" Width="64" Background="#FF5C97BF" BorderBrush="#FF162E3E" Foreground="Black" SelectionChanged="unitListSelectionChange" MouseEnter="unitListMouseEnter" d:IsLocked="True"/> 
        <toolkit:ListPicker x:Name="quantityTypeList" HorizontalAlignment="Left" Margin="176,24,0,0" VerticalAlignment="Top" Height="127" Width="202" Background="#FF5C97BF" BorderBrush="#FF162E3E" Foreground="Black" SelectionChanged="quantityTypeListSelectionChanged" LostFocus="quantityInputLostFocus"/> 
       </Grid> 
      </ScrollViewer> 
     </phone:PivotItem> 

说实话，我要做到这一点使它所以当手机处于轻的主题，它仍然容易阅读。出于某种原因，当手机是黑色主题时，列表选择器的背景是纯白色的，但在Light主题中它是透明的，我无法找到改变此属性的属性。我很开放并感谢任何建议。另外，我对xaml/windows phone还是比较陌生的。

Answer 1

以下博客文章涵盖了透明度+主题问题。 http://www.dotnetgeekette.com/2013/05/making-listpicker-display-correctly-in.html