有谁知道如何更改菜单背景的画笔？这听起来很简单，但我没有看到任何明显的方法来做到这一点。您认为Background属性会改变它，但它不会。
这是我的菜单的样子（注意默认的白色背景）：
示例代码：
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Window.Resources>
<SolidColorBrush x:Key="menuItemBrush"
Color="#FF505050" />
</Window.Resources>
<Grid x:Name="mainGrid"
Background="#FF252525">
<Menu x:Name="mainMenu"
Background="{DynamicResource menuItemBrush}"
Grid.ColumnSpan="2"
VerticalAlignment="Top">
<MenuItem x:Name="fileMenu"
Background="{DynamicResource menuItemBrush}"
Foreground="White"
Header="File">
<MenuItem x:Name="fileOpenMenuItem"
Background="{DynamicResource menuItemBrush}"
Foreground="White"
Header="Open..." />
<MenuItem x:Name="fileSaveMenuItem"
Background="{DynamicResource menuItemBrush}"
Foreground="White"
Header="Save" />
<MenuItem x:Name="fileSaveAsMenuItem"
Background="{DynamicResource menuItemBrush}"
Foreground="White"
Header="Save As..." />
<Separator Style="{DynamicResource menuItemSeperator}" />
<MenuItem x:Name="fileExitMenuItem"
Background="{DynamicResource menuItemBrush}"
Foreground="White"
Header="Exit" />
</MenuItem>
</Menu>
</Grid>
答案 0 :(得分：11)
我建议使用一个名为kaxaml的工具来编写样式。它包括几个代码片段，一个颜色选择器和一个很好的方法来立即看到xaml代码中的变化。这是一个完整的菜单样式，适合您尝试的操作。只需更改顶部的刷子颜色即可满足您的需求。
<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Page.Resources>
<!--**************************
* STYLE: MenuItem
************************** -->
<SolidColorBrush x:Key="HighlightedBackgroundBrush" Color="#FF797878" />
<SolidColorBrush x:Key="MenuBackgroundBrush" Color="#FF505050" />
<SolidColorBrush x:Key="NormalBorderBrush" Color="#FFFFFFFF" />
<SolidColorBrush x:Key="SolidMenuFontBrush" Color="#FFFFFFFF" />
<SolidColorBrush x:Key="HighlightedText" Color="#FFFFFFFF" />
<Style x:Key="{x:Type Menu}" TargetType="{x:Type Menu}">
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="Height" Value="25"/>
<Setter Property="Foreground" Value="{StaticResource SolidMenuFontBrush}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Menu}">
<Border
Background="{StaticResource MenuBackgroundBrush}"
BorderBrush="{StaticResource MenuBackgroundBrush}"
BorderThickness="1">
<StackPanel ClipToBounds="True" Orientation="Horizontal" IsItemsHost="True"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="{x:Type MenuItem}" TargetType="{x:Type MenuItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type MenuItem}">
<Border x:Name="Border"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition x:Name="Col0" MinWidth="17" Width="Auto" SharedSizeGroup="MenuItemIconColumnGroup"/>
<ColumnDefinition Width="Auto" SharedSizeGroup="MenuTextColumnGroup"/>
<ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIGTColumnGroup"/>
<ColumnDefinition x:Name="Col3" Width="14"/>
</Grid.ColumnDefinitions>
<!-- ContentPresenter to show an Icon if needed -->
<ContentPresenter Grid.Column="0" Margin="4,0,6,0" x:Name="Icon" VerticalAlignment="Center" ContentSource="Icon"/>
<!-- Glyph is a checkmark if needed for a checkable menu -->
<Grid Grid.Column="0" Visibility="Hidden" Margin="4,0,6,0" x:Name="GlyphPanel" VerticalAlignment="Center">
<Path x:Name="GlyphPanelpath" VerticalAlignment="Center" Fill="{TemplateBinding Foreground}" Data="M0,2 L0,4.8 L2.5,7.4 L7.1,2.8 L7.1,0 L2.5,4.6 z" FlowDirection="LeftToRight"/>
</Grid>
<!-- Content for the menu text etc -->
<ContentPresenter Grid.Column="1"
Margin="{TemplateBinding Padding}"
x:Name="HeaderHost"
RecognizesAccessKey="True"
ContentSource="Header"/>
<!-- Content for the menu IGT -->
<ContentPresenter Grid.Column="2"
Margin="8,1,8,1"
x:Name="IGTHost"
ContentSource="InputGestureText"
VerticalAlignment="Center"/>
<!-- Arrow drawn path which points to the next level of the menu -->
<Grid Grid.Column="3" Margin="4,0,6,0" x:Name="ArrowPanel" VerticalAlignment="Center">
<Path x:Name="ArrowPanelPath" HorizontalAlignment="Right" VerticalAlignment="Center" Fill="{TemplateBinding Foreground}" Data="M0,0 L0,8 L4,4 z"/>
</Grid>
<!-- The Popup is the body of the menu which expands down or across depending on the level of the item -->
<Popup IsOpen="{Binding Path=IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" x:Name="SubMenuPopup" Focusable="false" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}">
<Border x:Name="SubMenuBorder" BorderBrush="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Menu}}}" BorderThickness="1" Padding="2,2,2,2">
<Grid x:Name="SubMenu" Grid.IsSharedSizeScope="True">
<!-- StackPanel holds children of the menu. This is set by IsItemsHost=True -->
<StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Cycle"/>
</Grid>
</Border>
</Popup>
</Grid>
</Border>
<!-- These triggers re-configure the four arrangements of MenuItem to show different levels of menu via Role -->
<ControlTemplate.Triggers>
<!-- Role = TopLevelHeader : this is the root menu item in a menu; the Popup expands down -->
<Trigger Property="Role" Value="TopLevelHeader">
<Setter Property="Padding" Value="6,1,6,1"/>
<Setter Property="Placement" Value="Bottom" TargetName="SubMenuPopup"/>
<Setter Property="MinWidth" Value="0" TargetName="Col0"/>
<Setter Property="Width" Value="Auto" TargetName="Col3"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="Icon"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="GlyphPanel"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="IGTHost"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="ArrowPanel"/>
</Trigger>
<!-- Role = TopLevelItem : this is a child menu item from the top level without any child items-->
<Trigger Property="Role" Value="TopLevelItem">
<Setter Property="Padding" Value="6,1,6,1"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="ArrowPanel"/>
</Trigger>
<!-- Role = SubMenuHeader : this is a child menu item which does not have children -->
<Trigger Property="Role" Value="SubmenuHeader">
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Padding" Value="0,2,0,2"/>
</Trigger>
<!-- Role = SubMenuItem : this is a child menu item which has children-->
<Trigger Property="Role" Value="SubmenuItem">
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Padding" Value="0,2,0,2"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="ArrowPanel"/>
</Trigger>
<Trigger Property="IsSuspendingPopupAnimation" Value="true">
<Setter Property="PopupAnimation" Value="None" TargetName="SubMenuPopup"/>
</Trigger>
<!-- If no Icon is present the we collapse the Icon Content -->
<Trigger Property="Icon" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" TargetName="Icon"/>
</Trigger>
<!-- The GlyphPanel contains the CheckMark -->
<Trigger Property="IsChecked" Value="true">
<Setter Property="Visibility" Value="Visible" TargetName="GlyphPanel"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="Icon"/>
</Trigger>
<!-- Using the system colors for the Menu Highlight and IsEnabled-->
<Trigger Property="IsHighlighted" Value="true">
<Setter Property="Background" Value="{StaticResource HighlightedBackgroundBrush}" TargetName="Border"/>
<Setter Property="Foreground" Value="{StaticResource HighlightedText}"/>
<Setter Property="BorderBrush" Value="{StaticResource NormalBorderBrush}" TargetName="Border"/>
</Trigger>
<Trigger Property="IsHighlighted" Value="false">
<Setter Property="Background" Value="{StaticResource MenuBackgroundBrush}" TargetName="Border"/>
<Setter Property="Foreground" Value="{StaticResource SolidMenuFontBrush}"/>
<Setter Property="BorderBrush" Value="{StaticResource MenuBackgroundBrush}" TargetName="Border"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="LightGray"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid x:Name="mainGrid"
Background="#FF252525">
<Menu x:Name="mainMenu"
Grid.ColumnSpan="2"
VerticalAlignment="Top">
<MenuItem x:Name="fileMenu"
Header="File">
<MenuItem x:Name="fileOpenMenuItem"
Header="Open..." />
<MenuItem x:Name="fileSaveMenuItem"
Header="Save" />
<MenuItem x:Name="fileSaveAsMenuItem"
Background="{DynamicResource menuItemBrush}"
Header="Save As..." />
</MenuItem>
</Menu>
</Grid>
</Page>
答案 1 :(得分：1)
如果不覆盖菜单项的模板，则无法执行此操作。模板内部是一个名为“Part_Popup”的控件。你需要改变它的背景颜色。