WPF一个简单的垂直菜单样式的实现_wpf 自定义 menu

<Style TargetType="{x:Type Menu}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Menu}">
                        <Border CornerRadius="0">
                            <ItemsPresenter/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
 
        <Style TargetType="{x:Type MenuItem}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type MenuItem}">
                        <Border Margin="0,2" x:Name="bd" Background="#CCCCCC" MinWidth="100" CornerRadius="0">
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="30"/>
                                    <ColumnDefinition/>
                                </Grid.ColumnDefinitions>
                                <Rectangle Fill="#99CC66" Height="20" Width="20"/>
                                <ContentPresenter Margin="0,10" ContentSource="Header" Grid.Column="1" HorizontalAlignment="Left"/>
                                <Popup x:Name="pop" Margin="10" IsOpen="{TemplateBinding IsSubmenuOpen}" AllowsTransparency="True" Placement="Right">
                                    <Border Margin="5" CornerRadius="5" Background="#FFCCCC">
                                        <StackPanel IsItemsHost="True">
                                        </StackPanel>
                                    </Border>
                                </Popup>
                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="true">
                                <Setter TargetName="bd" Property="Background" Value="#0099CC"/>
                                <Setter TargetName="pop" Property="IsOpen" Value="true"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="False">
                                <Setter TargetName="pop" Property="IsOpen" Value="false"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="bd" Property="Background" Value="#FF6666"/>
                                <Setter TargetName="pop" Property="IsOpen" Value="false"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

<StackPanel Width="100" HorizontalAlignment="Left">
        <Menu>
            <MenuItem Header="开始">
                <MenuItem Header="开始"></MenuItem>
                <MenuItem Header="开始"></MenuItem>
                <MenuItem Header="开始"></MenuItem>
                <MenuItem Header="开始"></MenuItem>
            </MenuItem>
        </Menu>
        <Menu>
            <MenuItem Header="哈哈">
                <MenuItem Header="哈哈"></MenuItem>
                <MenuItem Header="哈哈"></MenuItem>
                <MenuItem Header="哈哈"></MenuItem>
                <MenuItem Header="哈哈"></MenuItem>
            </MenuItem>
        </Menu>
        <Menu>
            <MenuItem Header="哦哦">
                <MenuItem Header="好看啦啦啦"></MenuItem>
                <MenuItem Header="啦啦啦"></MenuItem>
                <MenuItem Header="啦啦啦"></MenuItem>
                <MenuItem Header="啦啦啦"></MenuItem>
            </MenuItem>
        </Menu>
    </StackPanel>