如何去掉WPF的MenuItem控件的第一列和第三列

Question

我想删除WPF Menu control的第一列（用于图标）和第三列（用于快捷键）（如下图1所示）。我尝试使用以下 hack，它确实隐藏了第一列和第三列（如下图 2 所示）。但是我想使用某种编辑模板或类似的方式正确删除这两列。

我的黑客 XAML 隐藏了第一和第三列:

<Menu DockPanel.Dock="Top">
    <MenuItem Header="_File">
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                 <StackPanel Margin="-31,0,-18,0"/>
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <MenuItem Header="_New" />
    </MenuItem>
</Menu>

图片 1（无破解）和图片 2 有破解的显示：

我已尝试编辑 VS2019 Blend 中的 menuitem 模板。但是在 Blend 右侧的属性 window（如下图 3 所示）中，我不确定我需要做什么才能删除这些列。当我右键单击 Blend 左侧的 MenuItem，然后单击 Edit Template，我得到了 MainWidndow.xaml 文件的 XAML 副本（如下所示）与 ControlTemplates 和 styles 等。我不确定我需要在 xaml 模板中修改什么以删除这两列。也许知识渊博的人可以提供帮助。

VS2019 Blend中 MainWindow.xaml 的设计视图的屏幕截图:

MainWindow.xaml [点击编辑模板后]

<Window x:Class="WpfApp_Test4RTB.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        ......>
    <Window.Resources>
        <SolidColorBrush x:Key="Menu.Static.Background" Color="#FFF0F0F0"/>
        <SolidColorBrush x:Key="Menu.Static.Border" Color="#FF999999"/>
        .............
        <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">F1 M 10.0,1.2 L 4.7,9.1 L 4.5,9.1 L 0,5.2 L 1.3,3.5 L 4.3,6.1L 8.3,0 L 10.0,1.2 Z</Geometry>
        <Style x:Key="MenuScrollButton" BasedOn="{x:Null}" TargetType="{x:Type RepeatButton}">
            <Setter Property="ClickMode" Value="Hover"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RepeatButton}">
                        <Border x:Name="templateRoot" Background="Transparent" BorderThickness="1" BorderBrush="Transparent" SnapsToDevicePixels="true">
                            <ContentPresenter HorizontalAlignment="Center" Margin="6" VerticalAlignment="Center"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="{ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}" BasedOn="{x:Null}" TargetType="{x:Type ScrollViewer}">
            <Setter Property="HorizontalScrollBarVisibility" Value="Hidden"/>
            <Setter Property="VerticalScrollBarVisibility" Value="Auto"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ScrollViewer}">
                        <Grid SnapsToDevicePixels="true">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <Border Grid.Column="0" Grid.Row="1">
                                <ScrollContentPresenter CanContentScroll="{TemplateBinding CanContentScroll}" Margin="{TemplateBinding Padding}"/>
                            </Border>
                            <RepeatButton Command="{x:Static ScrollBar.LineUpCommand}" CommandTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}" Grid.Column="0" Focusable="false" Grid.Row="0" Style="{StaticResource MenuScrollButton}">
                                <RepeatButton.Visibility>
                                    <MultiBinding Converter="{StaticResource MenuScrollingVisibilityConverter}" ConverterParameter="0" FallbackValue="Visibility.Collapsed">
                                        <Binding Path="ComputedVerticalScrollBarVisibility" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="VerticalOffset" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="ExtentHeight" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="ViewportHeight" RelativeSource="{RelativeSource TemplatedParent}"/>
                                    </MultiBinding>
                                </RepeatButton.Visibility>
                                <Path Data="{StaticResource UpArrow}" Fill="{StaticResource Menu.Static.Foreground}"/>
                            </RepeatButton>
                            <RepeatButton Command="{x:Static ScrollBar.LineDownCommand}" CommandTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}" Grid.Column="0" Focusable="false" Grid.Row="2" Style="{StaticResource MenuScrollButton}">
                                <RepeatButton.Visibility>
                                    <MultiBinding Converter="{StaticResource MenuScrollingVisibilityConverter}" ConverterParameter="100" FallbackValue="Visibility.Collapsed">
                                        <Binding Path="ComputedVerticalScrollBarVisibility" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="VerticalOffset" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="ExtentHeight" RelativeSource="{RelativeSource TemplatedParent}"/>
                                        <Binding Path="ViewportHeight" RelativeSource="{RelativeSource TemplatedParent}"/>
                                    </MultiBinding>
                                </RepeatButton.Visibility>
                                <Path Data="{StaticResource DownArrow}" Fill="{StaticResource Menu.Static.Foreground}"/>
                            </RepeatButton>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <ControlTemplate x:Key="{ComponentResourceKey ResourceId=TopLevelItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" SnapsToDevicePixels="true">
                <Grid VerticalAlignment="Center">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Path x:Name="GlyphPanel" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Margin="3" VerticalAlignment="Center" Visibility="Collapsed"/>
                    <ContentPresenter ContentSource="Header" Grid.Column="1" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="Icon" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsChecked" Value="true">
                    <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsHighlighted" Value="True">
                    <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
                    <Setter Property="Fill" TargetName="GlyphPanel" Value="{StaticResource Menu.Disabled.Foreground}"/>
                </Trigger>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsHighlighted" Value="True"/>
                        <Condition Property="IsEnabled" Value="False"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Background}"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Border}"/>
                </MultiTrigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <ControlTemplate x:Key="{ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" SnapsToDevicePixels="true">
                <Grid VerticalAlignment="Center">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Path x:Name="GlyphPanel" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{TemplateBinding Foreground}" Margin="3" VerticalAlignment="Center" Visibility="Collapsed"/>
                    <ContentPresenter ContentSource="Header" Grid.Column="1" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" PlacementTarget="{Binding ElementName=templateRoot}">
                        <Border x:Name="SubMenuBorder" Background="{StaticResource Menu.Static.Background}" BorderThickness="1" BorderBrush="{StaticResource Menu.Static.Border}" Padding="2">
                            <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                                <Grid RenderOptions.ClearTypeHint="Enabled">
                                    <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                        <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                                    </Canvas>
                                    <Rectangle Fill="{StaticResource Menu.Static.Separator}" HorizontalAlignment="Left" Margin="29,2,0,2" Width="1"/>
                                    <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                                </Grid>
                            </ScrollViewer>
                        </Border>
                    </Popup>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsSuspendingPopupAnimation" Value="true">
                    <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
                </Trigger>
                <Trigger Property="Icon" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsChecked" Value="true">
                    <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsHighlighted" Value="True">
                    <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
                    <Setter Property="Fill" TargetName="GlyphPanel" Value="{StaticResource Menu.Disabled.Foreground}"/>
                </Trigger>
                <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
                    <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
                    <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <ControlTemplate x:Key="{ComponentResourceKey ResourceId=SubmenuItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Height="22" SnapsToDevicePixels="true">
                <Grid Margin="-1">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition MinWidth="22" SharedSizeGroup="MenuItemIconColumnGroup" Width="Auto"/>
                        <ColumnDefinition Width="13"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="30"/>
                        <ColumnDefinition SharedSizeGroup="MenuItemIGTColumnGroup" Width="Auto"/>
                        <ColumnDefinition Width="20"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Border x:Name="GlyphPanel" Background="{StaticResource MenuItem.Selected.Background}" BorderThickness="1" BorderBrush="{StaticResource MenuItem.Selected.Border}" ClipToBounds="False" HorizontalAlignment="Center" Height="22" Margin="-1,0,0,0" VerticalAlignment="Center" Visibility="Hidden" Width="22">
                        <Path x:Name="Glyph" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Height="11" Width="10"/>
                    </Border>
                    <ContentPresenter x:Name="menuHeaderContainer" ContentSource="Header" Grid.Column="2" HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
                    <TextBlock x:Name="menuGestureText" Grid.Column="4" Margin="{TemplateBinding Padding}" Opacity="0.7" Text="{TemplateBinding InputGestureText}" VerticalAlignment="Center"/>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="Icon" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsChecked" Value="True">
                    <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsHighlighted" Value="True">
                    <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
                    <Setter Property="Fill" TargetName="Glyph" Value="{StaticResource Menu.Disabled.Foreground}"/>
                </Trigger>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsHighlighted" Value="True"/>
                        <Condition Property="IsEnabled" Value="False"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Background}"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Border}"/>
                </MultiTrigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <ControlTemplate x:Key="{ComponentResourceKey ResourceId=SubmenuHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Height="22" SnapsToDevicePixels="true">
                <Grid Margin="-1">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition MinWidth="22" SharedSizeGroup="MenuItemIconColumnGroup" Width="Auto"/>
                        <ColumnDefinition Width="13"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="30"/>
                        <ColumnDefinition SharedSizeGroup="MenuItemIGTColumnGroup" Width="Auto"/>
                        <ColumnDefinition Width="20"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Border x:Name="GlyphPanel" Background="{StaticResource MenuItem.Highlight.Background}" BorderThickness="1" BorderBrush="{StaticResource MenuItem.Highlight.Border}" Height="22" Margin="-1,0,0,0" VerticalAlignment="Center" Visibility="Hidden" Width="22">
                        <Path x:Name="Glyph" Data="{DynamicResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Height="11" Width="9"/>
                    </Border>
                    <ContentPresenter ContentSource="Header" Grid.Column="2" HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
                    <TextBlock Grid.Column="4" Margin="{TemplateBinding Padding}" Opacity="0.7" Text="{TemplateBinding InputGestureText}" VerticalAlignment="Center"/>
                    <Path x:Name="RightArrow" Grid.Column="5" Data="{StaticResource RightArrow}" Fill="{StaticResource Menu.Static.Foreground}" HorizontalAlignment="Left" Margin="10,0,0,0" VerticalAlignment="Center"/>
                    <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" HorizontalOffset="-2" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" VerticalOffset="-3">
                        <Border x:Name="SubMenuBorder" Background="{StaticResource Menu.Static.Background}" BorderThickness="1" BorderBrush="{StaticResource Menu.Static.Border}" Padding="2">
                            <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                                <Grid RenderOptions.ClearTypeHint="Enabled">
                                    <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                        <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                                    </Canvas>
                                    <Rectangle Fill="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}" HorizontalAlignment="Left" Margin="29,2,0,2" Width="1"/>
                                    <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                                </Grid>
                            </ScrollViewer>
                        </Border>
                    </Popup>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsSuspendingPopupAnimation" Value="true">
                    <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
                </Trigger>
                <Trigger Property="Icon" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsChecked" Value="True">
                    <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsHighlighted" Value="True">
                    <Setter Property="Background" TargetName="templateRoot" Value="Transparent"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
                    <Setter Property="Fill" TargetName="Glyph" Value="{StaticResource Menu.Disabled.Foreground}"/>
                    <Setter Property="Fill" TargetName="RightArrow" Value="{StaticResource Menu.Disabled.Foreground}"/>
                </Trigger>
                <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
                    <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
                    <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <Style x:Key="MenuItemStyle1" TargetType="{x:Type MenuItem}">
            <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
            <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
            <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
            <Style.Triggers>
                <Trigger Property="Role" Value="TopLevelHeader">
                    <Setter Property="Background" Value="Transparent"/>
                    <Setter Property="BorderBrush" Value="Transparent"/>
                    <Setter Property="Foreground" Value="{StaticResource Menu.Static.Foreground}"/>
                    <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
                    <Setter Property="Padding" Value="6,0"/>
                </Trigger>
                <Trigger Property="Role" Value="TopLevelItem">
                    <Setter Property="Background" Value="{StaticResource Menu.Static.Background}"/>
                    <Setter Property="BorderBrush" Value="{StaticResource Menu.Static.Border}"/>
                    <Setter Property="Foreground" Value="{StaticResource Menu.Static.Foreground}"/>
                    <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
                    <Setter Property="Padding" Value="6,0"/>
                </Trigger>
                <Trigger Property="Role" Value="SubmenuHeader">
                    <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
    <Window.CommandBindings>
        <CommandBinding Command="New" CanExecute="CommandBinding_CanExecute"  Executed="CommandBinding_Executed" />
    </Window.CommandBindings>
    <DockPanel>
        <Menu DockPanel.Dock="Top">
            <MenuItem Style="{DynamicResource MenuItemStyle1}" Header="_File">
                <MenuItem Command="New" />
            </MenuItem>
        </Menu>
    </DockPanel>
</Window>

Answer 1

MenuItem 根据其 Role 属性的值有不同的模板。这是一个示例，您应该能够根据您的要求进行修改：

<Menu DockPanel.Dock="Top">
    <MenuItem Header="_File">
        <MenuItem Header="_New">
            <MenuItem.Template>
                <ControlTemplate TargetType="{x:Type MenuItem}">
                    <ControlTemplate.Resources>
                        <SolidColorBrush x:Key="&#347;" Color="#FFF0F0F0" />
                        <SolidColorBrush x:Key="&#348;" Color="#FF999999" />
                        <SolidColorBrush x:Key="&#349;" Color="#FF212121" />

                        <SolidColorBrush x:Key="&#350;" Color="#FFD7D7D7" />

                        <SolidColorBrush x:Key="&#351;" Color="#3DDADADA" />
                        <SolidColorBrush x:Key="&#352;" Color="#FFDADADA" />
                        <SolidColorBrush x:Key="&#353;" Color="#FF707070" />

                        <SolidColorBrush x:Key="&#354;" Color="#3D26A0DA" />
                        <SolidColorBrush x:Key="&#355;" Color="#FF26A0DA" />

                        <SolidColorBrush x:Key="&#356;" Color="#3D26A0DA" />
                        <SolidColorBrush x:Key="&#357;" Color="#FF26A0DA" />

                        <SolidColorBrush x:Key="&#358;" Color="#0A000000" />
                        <SolidColorBrush x:Key="&#359;" Color="#21000000" />

                    </ControlTemplate.Resources>
                    <Border x:Name="templateRoot"
                                    SnapsToDevicePixels="true"
                                    BorderThickness="{TemplateBinding BorderThickness}"
                                    Background="{TemplateBinding Background}"
                                    BorderBrush="{TemplateBinding BorderBrush}">
                        <ContentPresenter x:Name="menuHeaderContainer"
                                        HorizontalAlignment="Left"
                                        VerticalAlignment="Center"
                                        ContentSource="Header"
                                        RecognizesAccessKey="True"
                                        Margin="{TemplateBinding MenuItem.Padding}"
                                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsHighlighted" Value="True">
                            <Setter TargetName="templateRoot" Property="Background" Value="{StaticResource &#356;}" />
                            <Setter TargetName="templateRoot" Property="BorderBrush" Value="{StaticResource &#357;}" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter TargetName="templateRoot" Property="TextElement.Foreground" Value="{StaticResource &#353;}" />
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsHighlighted" Value="True"/>
                                <Condition Property="IsEnabled" Value="False"/>
                            </MultiTrigger.Conditions>
                            <Setter TargetName="templateRoot" Property="Background" Value="{StaticResource &#358;}" />
                            <Setter TargetName="templateRoot" Property="BorderBrush" Value="{StaticResource &#359;}" />
                        </MultiTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </MenuItem.Template>
        </MenuItem>
    </MenuItem>
</Menu>

您将在 GitHub 上找到默认模板。

如何去掉WPF的MenuItem控件的第一列和第三列

How to remove the first and third columns of WPF's MenuItem control

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