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c# - 是哪个属性使背景变白？

问题描述

正如你在这里看到的，角落是白色的，我希望它是透明的，我知道 WPF 可能会出现问题，透明变成白色，但我可以将颜色更改为背景颜色。

在此处输入图像描述

所以我的问题是，我需要更改哪个属性以确保那里的角落不是白色的？

<Window.Resources>

        <Style x:Key="menuParentStyle" TargetType="MenuItem">
            <Setter Property="Background" Value="{DynamicResource PrimaryLighter}"/>
            <Setter Property="Foreground" Value="White"/>
        </Style>


        <SolidColorBrush x:Key="Menu.Static.Foreground" Color="White"/>
        <SolidColorBrush x:Key="Menu.Static.Background" Color="Black"/>
        <SolidColorBrush x:Key="Menu.Static.Border" Color="Transparent"/>
        <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="Black"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
            <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
            <Setter Property="Template" Value="{DynamicResource MenuItemControlTemplate1}"/>
            <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>
                <Trigger Property="IsMouseOver" Value="true">
                    <Setter Property="Background" Value="Pink" />
                </Trigger>
                <Trigger Property="IsKeyboardFocusWithin" Value="true">
                    <Setter Property="Background" Value="#0a99f3" />
                </Trigger>
            </Style.Triggers>
        </Style>
        <ControlTemplate x:Key="MenuItemControlTemplate1" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" 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" Content="{TemplateBinding Icon}" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Border x:Name="GlyphPanel" BorderBrush="#FF26A0DA" BorderThickness="1" Background="#3D26A0DA" ClipToBounds="False" HorizontalAlignment="Center" Height="22" Margin="-1,0,0,0" Visibility="Hidden" VerticalAlignment="Center" Width="22">
                        <Path x:Name="Glyph" Data="F1M10,1.2L4.7,9.1 4.5,9.1 0,5.2 1.3,3.5 4.3,6.1 8.3,0 10,1.2z" Fill="#FF212121" FlowDirection="LeftToRight" Height="11" Width="10"/>
                    </Border>
                    <ContentPresenter x:Name="menuHeaderContainer" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Grid.Column="2" ContentStringFormat="{TemplateBinding HeaderStringFormat}" ContentSource="Header" 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="{DynamicResource PrimaryLighter}"/>
                    <!--<Setter Property="BorderBrush" TargetName="templateRoot" Value="Yellow"/>-->
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="#FF707070"/>
                    <Setter Property="Fill" TargetName="Glyph" Value="#FF707070"/>
                </Trigger>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsHighlighted" Value="True"/>
                        <Condition Property="IsEnabled" Value="False"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="Background" TargetName="templateRoot" Value="#0A000000"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="#21000000"/>
                </MultiTrigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <ControlTemplate x:Key="MenuItemControlTemplate2" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" BorderBrush="Orange" 
                    BorderThickness="{TemplateBinding BorderThickness}" 
                    Background="{TemplateBinding Background}" 
                    SnapsToDevicePixels="True"
                    CornerRadius="5">
                <Grid VerticalAlignment="Center">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" Content="{TemplateBinding Icon}" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Path x:Name="GlyphPanel" Data="F1M10,1.2L4.7,9.1 4.5,9.1 0,5.2 1.3,3.5 4.3,6.1 8.3,0 10,1.2z" Fill="{TemplateBinding Foreground}" FlowDirection="LeftToRight" Margin="3" Visibility="Collapsed" VerticalAlignment="Center"/>
                    <ContentPresenter ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Grid.Column="1" ContentStringFormat="{TemplateBinding HeaderStringFormat}" ContentSource="Header" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <Popup x:Name="PART_Popup" AllowsTransparency="True" Focusable="False" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" Placement="Bottom">
                        <Border x:Name="SubMenuBorder" BorderBrush="#FF999999" BorderThickness="1" Background="#FFF0F0F0" 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="#FFD7D7D7" 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="{DynamicResource PrimaryLighter}"/>
                    <!--<Setter Property="BorderBrush" TargetName="templateRoot" Value="#FF26A0DA"/>-->
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="#FF707070"/>
                    <Setter Property="Fill" TargetName="GlyphPanel" Value="#FF707070"/>
                </Trigger>
                <Trigger Property="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>


    </Window.Resources>

执行

<StackPanel>
    <Menu>
        <MenuItem Header="_File" Style="{StaticResource menuParentStyle}" ItemContainerStyle="{DynamicResource MenuItemStyle1}" Template="{DynamicResource MenuItemControlTemplate2}" >
            <MenuItem Header="_New"  />
            <MenuItem Header="_Save"/>
            <MenuItem Header="_Quit" />
        </MenuItem>
        <MenuItem Header="_Edit" Style="{StaticResource menuParentStyle}"  ItemContainerStyle="{DynamicResource MenuItemStyle1}"  Template="{DynamicResource MenuItemControlTemplate2}">
            <MenuItem Header="_Copy"/>
            <MenuItem Header="_Cut" />
            <MenuItem Header="_Paste" />
        </MenuItem>
    </Menu>
</StackPanel>

标签： c#.netwpfxamlmvvm

解决方案

您应该设置Background父Menu元素的属性：

<Menu Background="Transparent" ...>

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