我是 XAML 和 UWP 新手，我有一个组合框，其中使用提到的样式，所有项目列表中所选项目的背景颜色是天蓝色，我想将其更改为红色或任何其他颜色，有人可以帮助我怎样做呢？ 预先感谢..
<Style x:Key="ComboBoxTextBoxStyle" TargetType="TextBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="Disabled">
<VisualState.Setters>
<Setter Target="BorderElement.Background" Value="{ThemeResource TextControlBackgroundDisabled}"/>
<Setter Target="BorderElement.BorderBrush" Value="{ThemeResource TextControlBorderBrushDisabled}"/>
<Setter Target="ContentElement.Foreground" Value="{ThemeResource TextControlForegroundDisabled}"/>
<Setter Target="PlaceholderTextContentPresenter.Foreground" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource TextControlPlaceholderForegroundDisabled}}"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Target="BorderElement.Background" Value="{ThemeResource TextControlBackgroundPointerOver}"/>
<Setter Target="BorderElement.BorderBrush" Value="{ThemeResource TextControlBorderBrushPointerOver}"/>
<Setter Target="ContentElement.Foreground" Value="{ThemeResource TextControlForegroundPointerOver}"/>
<Setter Target="PlaceholderTextContentPresenter.Foreground" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource TextControlPlaceholderForegroundPointerOver}}"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Focused">
<VisualState.Setters>
<Setter Target="BorderElement.Background" Value="{ThemeResource TextControlBackgroundFocused}"/>
<Setter Target="BorderElement.BorderBrush" Value="{ThemeResource TextControlBorderBrushFocused}"/>
<Setter Target="ContentElement.Foreground" Value="{ThemeResource TextControlForegroundFocused}"/>
<Setter Target="ContentElement.RequestedTheme" Value="Light"/>
<Setter Target="PlaceholderTextContentPresenter.Foreground" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource TextControlPlaceholderForegroundFocused}}"/>
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="BorderElement" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Control.IsTemplateFocusTarget="True"/>
<ScrollViewer x:Name="ContentElement" AutomationProperties.AccessibilityView="Raw" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}" IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}" IsTabStop="False" IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}" IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}" VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" ZoomMode="Disabled"/>
<TextBlock x:Name="PlaceholderTextContentPresenter" Foreground="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource TextControlPlaceholderForeground}}" IsHitTestVisible="False" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" TextAlignment="{TemplateBinding TextAlignment}" TextWrapping="{TemplateBinding TextWrapping}" Text="{TemplateBinding PlaceholderText}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="ComboBoxStyle1" TargetType="ComboBox">
<Setter Property="Padding" Value="12,5,0,7"/>
<Setter Property="MaxDropDownHeight" Value="504"/>
<Setter Property="Foreground" Value="{ThemeResource ComboBoxForeground}"/>
<Setter Property="Background" Value="{ThemeResource ComboBoxBackground}"/>
<Setter Property="BorderBrush" Value="{ThemeResource ComboBoxBorderBrush}"/>
<Setter Property="BorderThickness" Value="{ThemeResource ComboBoxBorderThemeThickness}"/>
<Setter Property="TabNavigation" Value="Once"/>
<Setter Property="TextBoxStyle" Value="{StaticResource ComboBoxTextBoxStyle}"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Disabled"/>
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto"/>
<Setter Property="ScrollViewer.IsVerticalRailEnabled" Value="True"/>
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False"/>
<Setter Property="ScrollViewer.BringIntoViewOnFocusChange" Value="True"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="HorizontalAlignment" Value="Left"/>
<Setter Property="VerticalAlignment" Value="Top"/>
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}"/>
<Setter Property="UseSystemFocusVisuals" Value="{ThemeResource IsApplicationFocusVisualKindReveal}"/>
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<CarouselPanel/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid x:Name="LayoutRoot">
<Grid.Resources>
<Storyboard x:Key="OverlayOpeningAnimation">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity">
<DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.383" KeySpline="0.1,0.9 0.2,1.0" Value="1.0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="OverlayClosingAnimation">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity">
<DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.216" KeySpline="0.1,0.9 0.2,1.0" Value="0.0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Grid.Resources>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="32"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBackgroundPointerOver}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBorderBrushPointerOver}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBackgroundPressed}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBorderBrushPressed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBackgroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBorderBrushDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxForegroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxForegroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource ComboBoxForegroundDisabled}}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDropDownGlyphForegroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="HighlightBackground" To="1" Storyboard.TargetProperty="Opacity"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HighlightBackground" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxBackgroundBorderBrushFocused}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxForegroundFocused}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource ComboBoxForegroundFocused}}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDropDownGlyphForegroundFocused}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="FocusedPressed">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="HighlightBackground" To="1" Storyboard.TargetProperty="Opacity"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxForegroundFocusedPressed}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource ComboBoxPlaceHolderForegroundFocusedPressed}}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDropDownGlyphForegroundFocusedPressed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
<VisualState x:Name="PointerFocused"/>
<VisualState x:Name="FocusedDropDown">
<Storyboard>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="PopupBorder" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DropDownStates">
<VisualState x:Name="Opened">
<Storyboard>
<SplitOpenThemeAnimation ClosedTargetName="ContentPresenter" OffsetFromCenter="{Binding TemplateSettings.DropDownOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}" OpenedLength="{Binding TemplateSettings.DropDownOpenedHeight, RelativeSource={RelativeSource Mode=TemplatedParent}}" OpenedTargetName="PopupBorder"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Closed">
<Storyboard>
<SplitCloseThemeAnimation ClosedTargetName="ContentPresenter" OffsetFromCenter="{Binding TemplateSettings.DropDownOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}" OpenedLength="{Binding TemplateSettings.DropDownOpenedHeight, RelativeSource={RelativeSource Mode=TemplatedParent}}" OpenedTargetName="PopupBorder"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="EditableModeStates">
<VisualState x:Name="TextBoxFocused">
<VisualState.Setters>
<!--<Setter Target="DropDownGlyph.Foreground" Value="{ThemeResource ComboBoxEditableDropDownGlyphForeground}"/>-->
<Setter Target="DropDownOverlay.Margin" Value="0,3,2,2"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="TextBoxFocusedOverlayPointerOver">
<VisualState.Setters>
<!--<Setter Target="DropDownGlyph.Foreground" Value="{ThemeResource ComboBoxEditableDropDownGlyphForeground}"/>-->
<Setter Target="DropDownOverlay.Background" Value="{ThemeResource ComboBoxFocusedDropDownBackgroundPointerOver}"/>
<Setter Target="DropDownOverlay.Margin" Value="0,3,2,2"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="TextBoxFocusedOverlayPressed">
<VisualState.Setters>
<!--<Setter Target="DropDownGlyph.Foreground" Value="{ThemeResource ComboBoxEditableDropDownGlyphForeground}"/>-->
<Setter Target="DropDownOverlay.Background" Value="{ThemeResource ComboBoxFocusedDropDownBackgroundPointerPressed}"/>
<Setter Target="DropDownOverlay.Margin" Value="0,3,2,2"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="TextBoxOverlayPointerOver">
<VisualState.Setters>
<Setter Target="DropDownOverlay.Background" Value="{ThemeResource ComboBoxDropDownBackgroundPointerOver}"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="TextBoxOverlayPressed">
<VisualState.Setters>
<Setter Target="DropDownOverlay.Background" Value="{ThemeResource ComboBoxDropDownBackgroundPointerPressed}"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="TextBoxUnfocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter x:Name="HeaderContentPresenter" ContentTemplate="{TemplateBinding HeaderTemplate}" Grid.Column="0" Content="{TemplateBinding Header}" Grid.ColumnSpan="2" FlowDirection="{TemplateBinding FlowDirection}" FontWeight="{ThemeResource ComboBoxHeaderThemeFontWeight}" Margin="{ThemeResource ComboBoxTopHeaderMargin}" Grid.Row="0" TextWrapping="Wrap" VerticalAlignment="Top" Visibility="Collapsed" x:DeferLoadStrategy="Lazy"/>
<Border x:Name="Background" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}" Grid.Column="0" Grid.ColumnSpan="2" Control.IsTemplateFocusTarget="True" MinWidth="{ThemeResource ComboBoxThemeMinWidth}" Grid.Row="1"/>
<Border x:Name="HighlightBackground" Background="{ThemeResource ComboBoxBackgroundUnfocused}" BorderBrush="{ThemeResource ComboBoxBackgroundBorderBrushUnfocused}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}" Grid.Column="0" Grid.ColumnSpan="2" Opacity="0" Grid.Row="1"/>
<ContentPresenter x:Name="ContentPresenter" Grid.Column="0" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" Grid.Row="1" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<TextBlock x:Name="PlaceholderTextBlock" Foreground="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource ComboBoxPlaceHolderForeground}}" Text="{TemplateBinding PlaceholderText}"/>
</ContentPresenter>
<TextBox x:Name="EditableText" BorderBrush="Transparent" Grid.Column="0" Grid.ColumnSpan="2" Foreground="{Binding PlaceholderForeground, RelativeSource={RelativeSource Mode=TemplatedParent}, TargetNullValue={ThemeResource ComboBoxPlaceHolderForeground}}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Header="{TemplateBinding Header}" Margin="0,0,0,0" AutomationProperties.Name="{TemplateBinding AutomationProperties.Name}" Padding="10,3,30,5" PlaceholderText="{TemplateBinding PlaceholderText}" Grid.Row="1" Style="{StaticResource ComboBoxTextBoxStyle}" Text="{Binding Text, Mode=TwoWay, RelativeSource={RelativeSource Mode=TemplatedParent}, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Visibility="Collapsed" x:Load="False"/>
<Border x:Name="DropDownOverlay" Background="Transparent" Grid.Column="1" HorizontalAlignment="Right" Margin="0,2,2,2" Grid.Row="1" Visibility="Collapsed" Width="30" x:Load="False"/>
<!--<FontIcon x:Name="DropDownGlyph" AutomationProperties.AccessibilityView="Raw" Grid.Column="1" Foreground="{ThemeResource ComboBoxDropDownGlyphForeground}" FontFamily="{ThemeResource SymbolThemeFontFamily}" FontSize="12" Glyph="" HorizontalAlignment="Right" IsHitTestVisible="False" Margin="0,10,10,10" Grid.Row="1" VerticalAlignment="Center"/>-->
<Path HorizontalAlignment="Right" IsHitTestVisible="False" Margin="0,10,10,10" Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" Data="M 8 0 L 16 16 0 16 Z"
StrokeThickness="5"
StrokeLineJoin="Round"
Stroke="#FF1A428A"
Fill="#FF1A428A" />
<ContentPresenter x:Name="DescriptionPresenter" Grid.Column="0" Content="{TemplateBinding Description}" Grid.ColumnSpan="2" Foreground="{ThemeResource SystemControlDescriptionTextForegroundBrush}" Grid.Row="2" x:Load="False"/>
<Popup x:Name="Popup">
<Border x:Name="PopupBorder" CornerRadius="20" Background="White" BackgroundSizing="OuterBorderEdge" BorderBrush="#FF1A428A" BorderThickness="2" HorizontalAlignment="Stretch" Margin="0,-1,0,-1" Padding="{ThemeResource ComboBoxDropdownBorderPadding}">
<ScrollViewer x:Name="ScrollViewer" AutomationProperties.AccessibilityView="Raw" BringIntoViewOnFocusChange="{TemplateBinding ScrollViewer.BringIntoViewOnFocusChange}" Foreground="{ThemeResource ComboBoxDropDownForeground}" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}" IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}" IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}" IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}" MinWidth="{Binding TemplateSettings.DropDownContentMinWidth, RelativeSource={RelativeSource Mode=TemplatedParent}}" VerticalSnapPointsAlignment="Near" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}" VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" VerticalSnapPointsType="OptionalSingle" ZoomMode="Disabled">
<ItemsPresenter Margin="{ThemeResource ComboBoxDropdownContentMargin}">
</ItemsPresenter>
</ScrollViewer>
</Border>
</Popup>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
我尝试过一些风格上的改变，但我不太知道该怎么做。 如果可能的话，如果可以通过改变样式来完成，我不想使用触发器。
如果要更改所选项目的背景颜色，则需要更改ComboBoxItem的样式。然后将自定义样式分配给
ComboBox控件的
ItemContainerStyle 属性。
这是您可以直接使用的样式。请在
BackgroundSelectedVisualState <Style TargetType="ComboBoxItem" x:Key="MyItemStyle">
<Setter Property="Foreground" Value="{ThemeResource ComboBoxItemForeground}" />
<Setter Property="Background" Value="{ThemeResource ComboBoxItemRevealBackground}" />
<Setter Property="BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource ComboBoxItemRevealBorderThemeThickness}" />
<Setter Property="TabNavigation" Value="Local" />
<Setter Property="Padding" Value="{ThemeResource ComboBoxItemRevealThemePadding}" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="UseSystemFocusVisuals" Value="{StaticResource UseSystemFocusVisuals}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBoxItem">
<Grid x:Name="LayoutRoot" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}" Control.IsTemplateFocusTarget="True">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="LayoutRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Target="LayoutRoot.(RevealBrush.State)" Value="PointerOver" />
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundPointerOver}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushPointerOver}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundPointerOver}" />
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="LayoutRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundDisabled}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushDisabled}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundDisabled}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Pressed">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundPressed}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushPressed}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundPressed}" />
<Setter Target="LayoutRoot.(RevealBrush.State)" Value="Pressed" />
</VisualState.Setters>
<Storyboard>
<PointerDownThemeAnimation Storyboard.TargetName="LayoutRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="Red" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushSelected}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundSelected}" />
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="LayoutRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedUnfocused">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundSelectedUnfocused}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushSelectedUnfocused}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundSelectedUnfocused}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="SelectedDisabled">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundSelectedDisabled}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushSelectedDisabled}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundSelectedDisabled}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundSelectedPointerOver}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushSelectedPointerOver}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundSelectedPointerOver}" />
<Setter Target="LayoutRoot.(RevealBrush.State)" Value="PointerOver" />
</VisualState.Setters>
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="LayoutRoot" />
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<VisualState.Setters>
<Setter Target="LayoutRoot.Background" Value="{ThemeResource ComboBoxItemRevealBackgroundSelectedPressed}" />
<Setter Target="LayoutRoot.BorderBrush" Value="{ThemeResource ComboBoxItemRevealBorderBrushSelectedPressed}" />
<Setter Target="ContentPresenter.Foreground" Value="{ThemeResource ComboBoxItemForegroundSelectedPressed}" />
<Setter Target="LayoutRoot.(RevealBrush.State)" Value="Pressed" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="InputModeStates">
<VisualState x:Name="InputModeDefault" />
<VisualState x:Name="TouchInputMode">
<VisualState.Setters>
<Setter Target="ContentPresenter.Margin" Value="{ThemeResource ComboBoxItemRevealThemeTouchPadding}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="GameControllerInputMode">
<VisualState.Setters>
<Setter Target="ContentPresenter.Margin" Value="{ThemeResource ComboBoxItemRevealThemeGameControllerPadding}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter x:Name="ContentPresenter"
Content="{TemplateBinding Content}"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Foreground="{TemplateBinding Foreground}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后需要将样式指定给ComboBox
<ComboBox x:Name="FontsCombo"
Style="{StaticResource ComboBoxStyle1}"
ItemContainerStyle="{StaticResource MyItemStyle}"
Header="Fonts" Height="88" Width="296"
ItemsSource="{x:Bind fonts}" />