wpf - 如何删除菜单项 (WPF) 的 "button"效果

Question

当鼠标悬停在菜单项(第一级)上时，它会显示 3D 按钮效果。如何删除？

谢谢。

---

编辑:

尝试过

<Style TargetType="MenuItem">
    <Style.Triggers>
        <Trigger Property="IsMouseOver" Value="True">
            <Setter Property="BorderBrush" Value="Transparent">
            <Setter Property="BorderThickness" Value="0">
        </Trigger>
    </Style.Triggers>
</Style>

没有效果。

菜单 XAML:

<Window x:Class="UCWPF.Window3"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:conv="clr-namespace:UCWPF.Converters"
    Title="Window3" Height="600" Width="600"
    Background="{StaticResource WindowBackgroundBrush}"
    >

<StackPanel Style="{StaticResource WindowContainerStyle}">
    <Menu>
        <MenuItem Header="New" Icon="{StaticResource ImageNew}" />
        <MenuItem Header="Open" Icon="{StaticResource ImageOpen}" />
        <MenuItem Header="Save" Icon="{StaticResource ImageSave}" />
        <MenuItem Header="Export" Icon="{StaticResource ImageExport}" />
    </Menu>
...

截图如下: bordereffect http://img408.imageshack.us/img408/6517/menuborder.png

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编辑 2:

强大的力量带来伟大的......复杂性:(。

看来应该重新定义整个菜单模板才能达到我的目的。 3D 效果由 MenuItem 子边框(用 Snoop 标识)提供，在鼠标悬停时，将其 BorderStyle 设置为凸起。我不知道在 <Style TargetType="MenuItem"> 中是否可以触摸边框样式元素，任何反馈将不胜感激。

Answer 1

<Style x:Key="{x:Type MenuItem}" TargetType="{x:Type MenuItem}">
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Style.Triggers>
  <Trigger Property="Role" Value="TopLevelHeader">
    <Setter Property="Template" Value="{StaticResource {x:Static MenuItem.TopLevelHeaderTemplateKey}}"/>
    <Setter Property="Grid.IsSharedSizeScope" Value="true"/>
  </Trigger>
</Style.Triggers>

  <ControlTemplate x:Key="{x:Static MenuItem.TopLevelHeaderTemplateKey}" TargetType="{x:Type MenuItem}">
<Border Name="Border" >
  <Grid>
    <ContentPresenter
      Margin="6,3,6,3"
      ContentSource="Header"
      RecognizesAccessKey="True" />
    <Popup
      Name="Popup"
      Placement="Bottom"
      IsOpen="{TemplateBinding IsSubmenuOpen}"
      AllowsTransparency="True"
      Focusable="False"
      PopupAnimation="Fade">
      <Border
        Name="SubmenuBorder"
        SnapsToDevicePixels="True"
        Background="{DynamicResource NormalBrush}"
        BorderBrush="{StaticResource SolidBorderBrush}"
        BorderThickness="1" >
        <ScrollViewer CanContentScroll="True"
          Style="{StaticResource MenuScrollViewer}">
          <StackPanel
          IsItemsHost="True"
          KeyboardNavigation.DirectionalNavigation="Cycle" />
        </ScrollViewer>
      </Border>
    </Popup>
  </Grid>
</Border>
<ControlTemplate.Triggers>
  <Trigger Property="IsSuspendingPopupAnimation" Value="true">
    <Setter TargetName="Popup" Property="PopupAnimation" Value="None"/>
  </Trigger>
  <Trigger Property="IsHighlighted" Value="true">
    <Setter TargetName="Border" Property="Background" Value="{StaticResource NormalBrush}"/>
    <Setter TargetName="Border" Property="BorderBrush" Value="Transparent"/>
  </Trigger>
  <!--Snippettoplevelheader-->
  <Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="True">
    <Setter TargetName="SubmenuBorder" Property="CornerRadius" Value="0,0,4,4"/>
    <Setter TargetName="SubmenuBorder" Property="Padding" Value="0,0,0,3"/>
  </Trigger>
  <!--/Snippettoplevelheader-->
  <Trigger Property="IsEnabled" Value="False">
    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
  </Trigger>
</ControlTemplate.Triggers>

触发器 IsHighlighted 定义鼠标悬停时的样式，如果移除触发器，当鼠标移到顶部菜单上时不显示任何内容

参见 http://msdn.microsoft.com/en-us/library/ms771597%28VS.85%29.aspx更多控件样式示例