列表框項目容器樣式，帶轉換器的數據模板

Question

我有列表框，其中嵌入了數據模板和轉換器。

<DataTemplate x:Key="DataTemplate">
            <Border x:Name="ListItemBorder" 
                    Margin="0,2,0,0" 
                    VerticalAlignment="Stretch"
                    HorizontalAlignment="Stretch"
                    Background="{Binding Converter={StaticResource BackgroundConvertor}}">
                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                    <TextBlock...

                    <Image ...

                </Grid>
            </Border>
        </DataTemplate>

該轉換器BackgroundConvertor在上面的代碼會在列表框中添加綠色作為背景2項中4項。

當我們點擊項目時，我也將樣式應用於列表框。

<Style x:Key="ListItemSelectorStyle" TargetType="ListBoxItem">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="1" />
            <Setter Property="Padding" Value="0" />
            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            <Setter Property="VerticalContentAlignment" Value="Center"/>
            <Setter Property ="Foreground" Value="Black" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Border x:Name="ListBoxItem" Background="{TemplateBinding Background}" 
                                    HorizontalAlignment="{TemplateBinding HorizontalAlignment}" 
                                    VerticalAlignment="{TemplateBinding VerticalAlignment}" 
                                    BorderBrush="{TemplateBinding BorderBrush}" 
                                    BorderThickness="{TemplateBinding BorderThickness}">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonStates">
                                    <VisualState x:Name="Normal"/>
                                    <VisualState x:Name="MouseOver">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ListItemBorder" Storyboard.TargetProperty="Background">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="#c9ebf2" />
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Disabled"/>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="SelectionStates">
                                    <VisualState x:Name="Unselected"/>
                                    <VisualState x:Name="Selected">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ListItemBorder" Storyboard.TargetProperty="Background">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="#c9ebf2" />
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Border x:Name="ListItemBorder" 
                                    BorderBrush="Transparent" Background="#e3e8f0">
                                <ContentControl x:Name="ContentContainer" 
                                                ContentTemplate="{TemplateBinding ContentTemplate}" 
                                                Content="{TemplateBinding Content}" 
                                                HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                                Margin="{TemplateBinding Padding}" 
                                                VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </Border>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

當我單擊列表項時，樣式根本沒有應用。樣式會將背景設置為所選項。

我在這里做錯了什么？

我正在使用Windows Phone 8應用程序。

Answer 1

您必須修改您的VisualState代碼：

Storyboard.TargetProperty="{TemplateBinding Background}"

使用綁定和轉換器時，必須設置Path屬性：

Background="{Binding Converter={StaticResource BackgroundConvertor}, Path=PROPERTY}"