Silverlight透明文本框背景

Question

我有一个RadGridView（来自Telerik），我试图能够选择一个单元格的内容。

所以我有一个单元格模板：

<telerik:GridViewDataColumn Header="{Binding Source={StaticResource ResourceStrings}, Path=ResourceStrings.Value}"
                                        DataMemberBinding="{Binding Value}" UniqueName="Value" Width="2*">
                <telerik:GridViewDataColumn.CellTemplate>
                    <DataTemplate>
                        <TextBox Text="{Binding Value}" IsReadOnly="True" Style="{StaticResource ReadOnlyStyle}"  />
                    </DataTemplate>
                </telerik:GridViewDataColumn.CellTemplate>
            </telerik:GridViewDataColumn>

使用TextBox的样式：

<Style x:Key="ReadOnlyStyle" TargetType="TextBox">
    <Setter Property="BorderThickness" Value="0"/>
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="Padding" Value="0"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="TextBox">
                <Grid x:Name="RootElement">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="MouseOver"/>
                            <VisualState x:Name="Disabled" />
                            <VisualState x:Name="ReadOnly"/>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Opacity">
                                        <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Opacity">
                                        <SplineDoubleKeyFrame KeyTime="0" Value="0"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Border x:Name="Border" Opacity="1" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="1">
                        <Grid>
                            <Border x:Name="MouseOverBorder" BorderBrush="Transparent" BorderThickness="1">
                                <ScrollViewer x:Name="ContentElement" BorderThickness="0" IsTabStop="False" Padding="{TemplateBinding Padding}"/>
                            </Border>
                        </Grid>
                    </Border>
                    <Border x:Name="DisabledVisualElement" IsHitTestVisible="False" Opacity="0" Background="#A5F7F7F7" BorderBrush="#A5F7F7F7" BorderThickness="{TemplateBinding BorderThickness}"/>
                    <Border x:Name="FocusVisualElement" Margin="1" IsHitTestVisible="False" Opacity="0" BorderBrush="#FF6DBDD1" BorderThickness="{TemplateBinding BorderThickness}"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

结果如下：

如何设法删除此白色背景？

由于

编辑：事实上，我们已经有了一个透明的文本框样式，它可以工作......我稍后会发布...