您需要从

You would need to take the default Styles from here and remove that area from the MenuItem's control template.

对于MenuItem，实际上您可以重新定义SubmenuItemTemplateKey和SubmenuHeaderTemplateKey ControlTemplate，类似于所描述的

For MenuItem, you can actually just redefine the SubmenuItemTemplateKey and SubmenuHeaderTemplateKey ControlTemplate, something like described here.

背景实际上是通过菜单样式呈现的.如果搜索"MenuItemIconColumnGroup"，则会找到使用它的所有位置.

The background is actually rendered by the Menu Style. If you search for "MenuItemIconColumnGroup", you will find all the places that use it.

这是一个使用黑色背景和白色前景的完整示例:

Here is a complete sample that uses a Black background and White foreground:

<Application x:Class="DeleteMeWPF.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:theme="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
         StartupUri="MainWindow.xaml">
<Application.Resources>

    <MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter" />
    <Geometry x:Key="DownArrow">M 0,0 L 3.5,4 L 7,0 Z</Geometry>
    <Geometry x:Key="UpArrow">M 0,4 L 3.5,0 L 7,4 Z</Geometry>
    <Geometry x:Key="RightArrow">M 0,0 L 4,3.5 L 0,7 Z</Geometry>

    <Geometry x:Key="Checkmark">M 0,5.1 L 1.7,5.2 L 3.4,7.1 L 8,0.4 L 9.2,0 L 3.3,10.8 Z</Geometry>

    <LinearGradientBrush x:Key="MenuItemSelectionFill" StartPoint="0,0" EndPoint="0,1">
        <LinearGradientBrush.GradientStops>
            <GradientStop Color="#34C5EBFF" Offset="0" />
            <GradientStop Color="#3481D8FF" Offset="1" />
        </LinearGradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="MenuItemPressedFill" StartPoint="0,0" EndPoint="0,1">
        <LinearGradientBrush.GradientStops>
            <GradientStop Color="#28717070" Offset="0" />
            <GradientStop Color="#50717070" Offset="0.75" />
            <GradientStop Color="#90717070" Offset="1" />
        </LinearGradientBrush.GradientStops>
    </LinearGradientBrush>

    <Style x:Key="{x:Static MenuItem.SeparatorStyleKey}" TargetType="{x:Type Separator}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Separator}">
                    <Grid SnapsToDevicePixels="true" Margin="0,6,0,4">
                        <Rectangle Height="1" Margin="30,0,1,1" Fill="#E0E0E0" />
                        <Rectangle Height="1" Margin="30,1,1,0" Fill="White" />
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <ControlTemplate x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type FrameworkElement}, ResourceId=SubmenuContent}"
            TargetType="{x:Type ContentControl}">
        <Border Background="Black" BorderBrush="#FF959595" BorderThickness="1">
            <ContentPresenter Grid.ColumnSpan="2" Margin="1,0" />
        </Border>
    </ControlTemplate>

    <ControlTemplate x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=TopLevelItemTemplateKey}"
            TargetType="{x:Type MenuItem}">
        <Grid SnapsToDevicePixels="true">
            <Rectangle x:Name="OuterBorder" RadiusX="2" RadiusY="2" />
            <Rectangle Name="Bg" Margin="1" Fill="{TemplateBinding MenuItem.Background}" Stroke="{TemplateBinding MenuItem.BorderBrush}"
                    StrokeThickness="1" RadiusX="1" RadiusY="1" />
            <Rectangle x:Name="InnerBorder" Margin="2" />
            <DockPanel>
                <ContentPresenter x:Name="Icon" Margin="4,0,6,0" VerticalAlignment="Center" ContentSource="Icon"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <Path x:Name="GlyphPanel" Margin="7,0,0,0" Visibility="Collapsed" VerticalAlignment="Center"
                        Fill="{TemplateBinding MenuItem.Foreground}" FlowDirection="LeftToRight" Data="{StaticResource Checkmark}" />
                <ContentPresenter ContentSource="Header" Margin="{TemplateBinding MenuItem.Padding}" RecognizesAccessKey="True"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
            </DockPanel>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="Icon" Value="{x:Null}">
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsChecked" Value="true">
                <Setter TargetName="GlyphPanel" Property="Visibility" Value="Visible" />
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsHighlighted" Value="true">
                <Setter TargetName="Bg" Property="Stroke" Value="#90717070" />
                <Setter TargetName="OuterBorder" Property="Stroke" Value="#50FFFFFF" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#50FFFFFF" />

            </Trigger>
            <Trigger Property="IsKeyboardFocused" Value="true">
                <Setter TargetName="Bg" Property="Stroke" Value="#E0717070" />
                <Setter TargetName="Bg" Property="Fill" Value="{StaticResource MenuItemPressedFill}" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#50747272" />
            </Trigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="#FF9A9A9A" />
                <Setter TargetName="GlyphPanel" Property="Fill" Value="#848589" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
    <ControlTemplate x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=TopLevelHeaderTemplateKey}"
            TargetType="{x:Type MenuItem}">
        <Grid SnapsToDevicePixels="true">
            <Rectangle x:Name="OuterBorder" RadiusX="2" RadiusY="2" />
            <Rectangle Name="Bg" Margin="1" Fill="{TemplateBinding MenuItem.Background}" Stroke="{TemplateBinding MenuItem.BorderBrush}"
                    StrokeThickness="1" RadiusX="1" RadiusY="1" />
            <Rectangle x:Name="InnerBorder" Margin="2" />
            <DockPanel>
                <ContentPresenter x:Name="Icon" Margin="4,0,6,0" VerticalAlignment="Center" ContentSource="Icon"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <Path x:Name="GlyphPanel" Margin="7,0,0,0" Visibility="Collapsed" VerticalAlignment="Center"
                        Fill="{TemplateBinding MenuItem.Foreground}" FlowDirection="LeftToRight" Data="{StaticResource Checkmark}" />
                <ContentPresenter ContentSource="Header" Margin="{TemplateBinding MenuItem.Padding}" RecognizesAccessKey="True"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
            </DockPanel>
            <Popup x:Name="PART_Popup" HorizontalOffset="1" VerticalOffset="-1" AllowsTransparency="true" Placement="Bottom"
                    IsOpen="{Binding Path=IsSubmenuOpen,RelativeSource={RelativeSource TemplatedParent}}" Focusable="false"
                    PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}">
                <theme:SystemDropShadowChrome Name="Shdw" Color="Transparent">
                    <ContentControl Name="SubMenuBorder"
                            Template="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type FrameworkElement}, ResourceId=SubmenuContent}}"
                            IsTabStop="false">
                        <ScrollViewer CanContentScroll="true"
                                Style="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type FrameworkElement}, ResourceId=MenuScrollViewer}}">
                            <ItemsPresenter Margin="2" KeyboardNavigation.TabNavigation="Cycle"
                                    KeyboardNavigation.DirectionalNavigation="Cycle"
                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Grid.IsSharedSizeScope="true" />
                        </ScrollViewer>
                    </ContentControl>
                </theme:SystemDropShadowChrome>
            </Popup>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="IsSuspendingPopupAnimation" Value="true">
                <Setter TargetName="PART_Popup" Property="PopupAnimation" Value="None" />
            </Trigger>
            <Trigger Property="Icon" Value="{x:Null}">
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsChecked" Value="true">
                <Setter TargetName="GlyphPanel" Property="Visibility" Value="Visible" />
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger SourceName="PART_Popup" Property="Popup.HasDropShadow" Value="true">
                <Setter TargetName="Shdw" Property="Margin" Value="0,0,5,5" />
                <Setter TargetName="Shdw" Property="Color" Value="#71000000" />
            </Trigger>
            <Trigger Property="IsHighlighted" Value="true">
                <Setter TargetName="Bg" Property="Stroke" Value="#90717070" />
                <Setter TargetName="OuterBorder" Property="Stroke" Value="#50FFFFFF" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#50FFFFFF" />
            </Trigger>
            <Trigger Property="IsKeyboardFocused" Value="true">
                <Setter TargetName="Bg" Property="Stroke" Value="#E0717070" />
                <Setter TargetName="Bg" Property="Fill" Value="{StaticResource MenuItemPressedFill}" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#50747272" />
            </Trigger>
            <Trigger Property="IsSubmenuOpen" Value="true">
                <Setter TargetName="Bg" Property="Stroke" Value="#E0717070" />
                <Setter TargetName="Bg" Property="Fill" Value="{StaticResource MenuItemPressedFill}" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#50747272" />
            </Trigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="#FF9A9A9A" />
                <Setter TargetName="GlyphPanel" Property="Fill" Value="#848589" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
    <ControlTemplate x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=SubmenuItemTemplateKey}"
            TargetType="{x:Type MenuItem}">
        <Grid SnapsToDevicePixels="true">
            <Rectangle Name="Bg" Fill="{TemplateBinding MenuItem.Background}" Stroke="{TemplateBinding MenuItem.BorderBrush}"
                    StrokeThickness="1" RadiusX="2" RadiusY="2" />
            <Rectangle x:Name="InnerBorder" Margin="1" RadiusX="2" RadiusY="2" />
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIconColumnGroup" />
                    <ColumnDefinition Width="4" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="37" />
                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIGTColumnGroup" />
                    <ColumnDefinition Width="17" />
                </Grid.ColumnDefinitions>
                <ContentPresenter x:Name="Icon" Margin="1" VerticalAlignment="Center" ContentSource="Icon"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <Border x:Name="GlyphPanel" Background="#E6EFF4" BorderBrush="#CDD3E6" BorderThickness="1" CornerRadius="3" Margin="1"
                        Visibility="Collapsed" Width="22" Height="22">
                    <Path Name="Glyph" Width="9" Height="11" Fill="#0C12A1" FlowDirection="LeftToRight"
                            Data="{StaticResource Checkmark}" />
                </Border>
                <ContentPresenter Grid.Column="2" ContentSource="Header" Margin="{TemplateBinding MenuItem.Padding}"
                        RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <TextBlock Grid.Column="4" Text="{TemplateBinding MenuItem.InputGestureText}"
                        Margin="{TemplateBinding MenuItem.Padding}" />
            </Grid>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="Icon" Value="{x:Null}">
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsChecked" Value="true">
                <Setter TargetName="GlyphPanel" Property="Visibility" Value="Visible" />
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsHighlighted" Value="true">
                <Setter TargetName="Bg" Property="Fill" Value="{StaticResource MenuItemSelectionFill}" />
                <Setter TargetName="Bg" Property="Stroke" Value="#8071CBF1" />
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#40FFFFFF" />
            </Trigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="#FF9A9A9A" />
                <Setter TargetName="GlyphPanel" Property="Background" Value="#EEE9E9" />
                <Setter TargetName="GlyphPanel" Property="BorderBrush" Value="#DBD6D6" />
                <Setter TargetName="Glyph" Property="Fill" Value="#848589" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
    <ControlTemplate x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=SubmenuHeaderTemplateKey}"
            TargetType="{x:Type MenuItem}">
        <Grid SnapsToDevicePixels="true">
            <Rectangle Name="Bg" Fill="{TemplateBinding MenuItem.Background}" Stroke="{TemplateBinding MenuItem.BorderBrush}"
                    StrokeThickness="1" RadiusX="2" RadiusY="2" />
            <Rectangle x:Name="InnerBorder" Margin="1" Stroke="Transparent" StrokeThickness="1" RadiusX="2" RadiusY="2" />
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIconColumnGroup" />
                    <ColumnDefinition Width="4" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="37" />
                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIGTColumnGroup" />
                    <ColumnDefinition Width="17" />
                </Grid.ColumnDefinitions>
                <ContentPresenter x:Name="Icon" Margin="1" VerticalAlignment="Center" ContentSource="Icon"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <Border x:Name="GlyphPanel" Background="#E6EFF4" BorderBrush="#CDD3E6" BorderThickness="1" CornerRadius="3" Margin="1"
                        Visibility="Collapsed" Width="22" Height="22">
                    <Path Name="Glyph" Width="9" Height="11" Fill="#0C12A1" FlowDirection="LeftToRight"
                            Data="{StaticResource Checkmark}" />
                </Border>
                <ContentPresenter Grid.Column="2" ContentSource="Header" Margin="{TemplateBinding MenuItem.Padding}"
                        RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                <TextBlock Grid.Column="4" Text="{TemplateBinding MenuItem.InputGestureText}"
                        Margin="{TemplateBinding MenuItem.Padding}" Visibility="Collapsed" />
                <Path Grid.Column="5" VerticalAlignment="Center" Margin="4,0,0,0" Fill="{TemplateBinding MenuItem.Foreground}"
                        Data="{StaticResource RightArrow}" />
            </Grid>
            <Popup x:Name="PART_Popup" AllowsTransparency="true" Placement="Right" VerticalOffset="-3" HorizontalOffset="-2"
                    IsOpen="{Binding Path=IsSubmenuOpen,RelativeSource={RelativeSource TemplatedParent}}" Focusable="false"
                    PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}">
                <theme:SystemDropShadowChrome Name="Shdw" Color="Transparent">
                    <ContentControl Name="SubMenuBorder"
                            Template="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type FrameworkElement}, ResourceId=SubmenuContent}}"
                            IsTabStop="false">
                        <ScrollViewer CanContentScroll="true"
                                Style="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type FrameworkElement}, ResourceId=MenuScrollViewer}}">
                            <ItemsPresenter Margin="2" KeyboardNavigation.TabNavigation="Cycle"
                                    KeyboardNavigation.DirectionalNavigation="Cycle"
                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Grid.IsSharedSizeScope="true" />
                        </ScrollViewer>
                    </ContentControl>
                </theme:SystemDropShadowChrome>
            </Popup>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="IsSuspendingPopupAnimation" Value="true">
                <Setter TargetName="PART_Popup" Property="PopupAnimation" Value="None" />
            </Trigger>
            <Trigger Property="IsHighlighted" Value="true">
                <Setter TargetName="InnerBorder" Property="Stroke" Value="#D1DBF4FF" />
            </Trigger>
            <Trigger Property="Icon" Value="{x:Null}">
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger Property="IsChecked" Value="true">
                <Setter TargetName="GlyphPanel" Property="Visibility" Value="Visible" />
                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed" />
            </Trigger>
            <Trigger SourceName="PART_Popup" Property="Popup.HasDropShadow" Value="true">
                <Setter TargetName="Shdw" Property="Margin" Value="0,0,5,5" />
                <Setter TargetName="Shdw" Property="Color" Value="#71000000" />
            </Trigger>
            <Trigger Property="IsHighlighted" Value="true">
                <Setter TargetName="Bg" Property="Fill" Value="{StaticResource MenuItemSelectionFill}" />
                <Setter TargetName="Bg" Property="Stroke" Value="#8571CBF1" />
            </Trigger>
            <Trigger Property="IsEnabled" Value="false">
                <Setter Property="Foreground" Value="#FF9A9A9A" />
                <Setter TargetName="GlyphPanel" Property="Background" Value="#EEE9E9" />
                <Setter TargetName="GlyphPanel" Property="BorderBrush" Value="#DBD6D6" />
                <Setter TargetName="Glyph" Property="Fill" Value="#848589" />
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
    <Style TargetType="{x:Type MenuItem}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="HorizontalContentAlignment"
                Value="{Binding Path=HorizontalContentAlignment,RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="VerticalContentAlignment"
                Value="{Binding Path=VerticalContentAlignment,RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Template"
                Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=SubmenuItemTemplateKey}}" />
        <Style.Triggers>
            <Trigger Property="Role" Value="TopLevelHeader">
                <Setter Property="Padding" Value="7,2,8,3" />
                <Setter Property="Template"
                        Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=TopLevelHeaderTemplateKey}}" />
            </Trigger>
            <Trigger Property="Role" Value="TopLevelItem">
                <Setter Property="Padding" Value="7,2,8,3" />
                <Setter Property="Template"
                        Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=TopLevelItemTemplateKey}}" />
            </Trigger>
            <Trigger Property="Role" Value="SubmenuHeader">
                <Setter Property="Padding" Value="2,3,2,3" />
                <Setter Property="Template"
                        Value="{DynamicResource {ComponentResourceKey TypeInTargetAssembly={x:Type MenuItem}, ResourceId=SubmenuHeaderTemplateKey}}" />
            </Trigger>
            <Trigger Property="Role" Value="SubmenuItem">
                <Setter Property="Padding" Value="2,3,2,3" />
            </Trigger>
        </Style.Triggers>
    </Style>

    <Style TargetType="{x:Type Menu}">
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="Background" Value="Black" />
        <Setter Property="FontFamily" Value="{DynamicResource {x:Static SystemFonts.MenuFontFamilyKey}}" />
        <Setter Property="FontSize" Value="{DynamicResource {x:Static SystemFonts.MenuFontSizeKey}}" />
        <Setter Property="FontStyle" Value="{DynamicResource {x:Static SystemFonts.MenuFontStyleKey}}" />
        <Setter Property="FontWeight" Value="{DynamicResource {x:Static SystemFonts.MenuFontWeightKey}}" />
        <Setter Property="Foreground" Value="White" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Menu}">
                    <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
                            SnapsToDevicePixels="true">
                        <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</Application.Resources>
</Application>