如何删除WPF(C#)中Expander控件头部的虚线轮廓？

概述如何删除 WPF(C#)中Expander控件头部的虚线轮廓？ 我尝试将FocusVisualStyle设为null但没有运气.还有其他方法吗？ <UserControl x:Class="MyControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://sche 如何删除 WPF(C#)中Expander控件头部的虚线轮廓？

我尝试将FocusVisualStyle设为null但没有运气.还有其他方法吗？

<UserControl x:Class="MyControl"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Height="373" WIDth="669">    <Expander FocusVisualStyle="{x:Null}" Expanded="expander1_Expanded" Focusable="False" Foreground="DarkBlue" header="My header" Height="219" name="expander1" WIDth="525">.....

解决方法 您需要对此部分进行更改(请参阅消息底部的完整模板)
此示例使红色笔划更粗：

`<Style x:Key="ExpanderheaderFocusVisual">        <Setter Property="Control.Template">            <Setter.Value>                <ControlTemplate>                    <border>                        <Rectangle margin="0" SnapsToDevicePixels="true" stroke="Red" strokeThickness="2" strokeDashArray="1 2"/>                    </border>                </ControlTemplate>            </Setter.Value>        </Setter>    </Style>`

这是Blend捕获的扩展器的原始模板 – 它将自动应用于该窗口中的所有扩展器.

    `<Window.Resources>        <Style x:Key="ExpanderRightheaderStyle" targettype="{x:Type Togglebutton}">            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Togglebutton}">                        <border padding="{TemplateBinding padding}">                            <GrID Background="transparent" SnapsToDevicePixels="False">                                <GrID.RowDeFinitions>                                    <RowDeFinition Height="19"/>                                    <RowDeFinition Height="*"/>                                </GrID.RowDeFinitions>                                <GrID>                                    <GrID.Layouttransform>                                        <transformGroup>                                            <transformGroup.Children>                                                <transformCollection>                                                    <Rotatetransform Angle="-90"/>                                                </transformCollection>                                            </transformGroup.Children>                                        </transformGroup>                                    </GrID.Layouttransform>                                    <Ellipse x:name="circle" HorizontalAlignment="Center" Height="19" stroke="DarkGray" VerticalAlignment="Center" WIDth="19"/>                                    <Path x:name="arrow" Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" SnapsToDevicePixels="false" stroke="#666" strokeThickness="2" VerticalAlignment="Center"/>                                </GrID>                                <ContentPresenter HorizontalAlignment="Center" margin="0,4,0" GrID.Row="1" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="top"/>                            </GrID>                        </border>                        <ControlTemplate.Triggers>                            <Trigger Property="IsChecked" Value="true">                                <Setter Property="Data" Targetname="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>                            </Trigger>                            <Trigger Property="IsMouSEOver" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF3C7FB1"/>                                <Setter Property="stroke" Targetname="arrow" Value="#222"/>                            </Trigger>                            <Trigger Property="Ispressed" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF526C7B"/>                                <Setter Property="strokeThickness" Targetname="circle" Value="1.5"/>                                <Setter Property="stroke" Targetname="arrow" Value="#FF003366"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="ExpanderUpheaderStyle" targettype="{x:Type Togglebutton}">            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Togglebutton}">                        <border padding="{TemplateBinding padding}">                            <GrID Background="transparent" SnapsToDevicePixels="False">                                <GrID.ColumnDeFinitions>                                    <ColumnDeFinition WIDth="19"/>                                    <ColumnDeFinition WIDth="*"/>                                </GrID.ColumnDeFinitions>                                <GrID>                                    <GrID.Layouttransform>                                        <transformGroup>                                            <transformGroup.Children>                                                <transformCollection>                                                    <Rotatetransform Angle="180"/>                                                </transformCollection>                                            </transformGroup.Children>                                        </transformGroup>                                    </GrID.Layouttransform>                                    <Ellipse x:name="circle" HorizontalAlignment="Center" Height="19" stroke="DarkGray" VerticalAlignment="Center" WIDth="19"/>                                    <Path x:name="arrow" Data="M 1,1.5" HorizontalAlignment="Center" SnapsToDevicePixels="false" stroke="#666" strokeThickness="2" VerticalAlignment="Center"/>                                </GrID>                                <ContentPresenter GrID.Column="1" HorizontalAlignment="left" margin="4,0" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="Center"/>                            </GrID>                        </border>                        <ControlTemplate.Triggers>                            <Trigger Property="IsChecked" Value="true">                                <Setter Property="Data" Targetname="arrow" Value="M 1,4.5"/>                            </Trigger>                            <Trigger Property="IsMouSEOver" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF3C7FB1"/>                                <Setter Property="stroke" Targetname="arrow" Value="#222"/>                            </Trigger>                            <Trigger Property="Ispressed" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF526C7B"/>                                <Setter Property="strokeThickness" Targetname="circle" Value="1.5"/>                                <Setter Property="stroke" Targetname="arrow" Value="#FF003366"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="ExpanderleftheaderStyle" targettype="{x:Type Togglebutton}">            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Togglebutton}">                        <border padding="{TemplateBinding padding}">                            <GrID Background="transparent" SnapsToDevicePixels="False">                                <GrID.RowDeFinitions>                                    <RowDeFinition Height="19"/>                                    <RowDeFinition Height="*"/>                                </GrID.RowDeFinitions>                                <GrID>                                    <GrID.Layouttransform>                                        <transformGroup>                                            <transformGroup.Children>                                                <transformCollection>                                                    <Rotatetransform Angle="90"/>                                                </transformCollection>                                            </transformGroup.Children>                                        </transformGroup>                                    </GrID.Layouttransform>                                    <Ellipse x:name="circle" HorizontalAlignment="Center" Height="19" stroke="DarkGray" VerticalAlignment="Center" WIDth="19"/>                                    <Path x:name="arrow" Data="M 1,4.5"/>                            </Trigger>                            <Trigger Property="IsMouSEOver" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF3C7FB1"/>                                <Setter Property="stroke" Targetname="arrow" Value="#222"/>                            </Trigger>                            <Trigger Property="Ispressed" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF526C7B"/>                                <Setter Property="strokeThickness" Targetname="circle" Value="1.5"/>                                <Setter Property="stroke" Targetname="arrow" Value="#FF003366"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="ExpanderheaderFocusVisual">            <Setter Property="Control.Template">                <Setter.Value>                    <ControlTemplate>                        <border>                            <Rectangle margin="0" SnapsToDevicePixels="true" stroke="Black" strokeThickness="1" strokeDashArray="1 2"/>                        </border>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="ExpanderDownheaderStyle" targettype="{x:Type Togglebutton}">            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Togglebutton}">                        <border padding="{TemplateBinding padding}">                            <GrID Background="transparent" SnapsToDevicePixels="False">                                <GrID.ColumnDeFinitions>                                    <ColumnDeFinition WIDth="19"/>                                    <ColumnDeFinition WIDth="*"/>                                </GrID.ColumnDeFinitions>                                <Ellipse x:name="circle" HorizontalAlignment="Center" Height="19" stroke="DarkGray" VerticalAlignment="Center" WIDth="19"/>                                <Path x:name="arrow" Data="M 1,1.5" HorizontalAlignment="Center" SnapsToDevicePixels="false" stroke="#666" strokeThickness="2" VerticalAlignment="Center"/>                                <ContentPresenter GrID.Column="1" HorizontalAlignment="left" margin="4,4.5"/>                            </Trigger>                            <Trigger Property="IsMouSEOver" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF3C7FB1"/>                                <Setter Property="stroke" Targetname="arrow" Value="#222"/>                            </Trigger>                            <Trigger Property="Ispressed" Value="true">                                <Setter Property="stroke" Targetname="circle" Value="#FF526C7B"/>                                <Setter Property="strokeThickness" Targetname="circle" Value="1.5"/>                                <Setter Property="stroke" Targetname="arrow" Value="#FF003366"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="StyledExpander" targettype="{x:Type Expander}">            <Setter Property="Foreground" Value="{DynamicResource {x:Static Systemcolors.ControlTextBrushKey}}"/>            <Setter Property="Background" Value="transparent"/>            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>            <Setter Property="VerticalContentAlignment" Value="Stretch"/>            <Setter Property="borderBrush" Value="transparent"/>            <Setter Property="borderThickness" Value="1"/>            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Expander}">                        <border borderBrush="{TemplateBinding borderBrush}" borderThickness="{TemplateBinding borderThickness}" Background="{TemplateBinding Background}" CornerRadius="3" SnapsToDevicePixels="true">                            <DockPanel>                                <Togglebutton x:name="headerSite" ContentTemplate="{TemplateBinding headerTemplate}" ContentTemplateSelector="{TemplateBinding headerTemplateSelector}" Content="{TemplateBinding header}" DockPanel.Dock="top" Foreground="{TemplateBinding Foreground}" FontWeight="{TemplateBinding FontWeight}" FocusVisualStyle="{StaticResource ExpanderheaderFocusVisual}" FontStyle="{TemplateBinding FontStyle}" FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsChecked="{Binding IsExpanded,Mode=TwoWay,relativeSource={relativeSource TemplatedParent}}" margin="1" MinWIDth="0" MinHeight="0" padding="{TemplateBinding padding}" Style="{StaticResource ExpanderDownheaderStyle}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>                                <ContentPresenter x:name="ExpandSite" DockPanel.Dock="Bottom" Focusable="false" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" margin="{TemplateBinding padding}" Visibility="Collapsed" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>                            </DockPanel>                        </border>                        <ControlTemplate.Triggers>                            <Trigger Property="IsExpanded" Value="true">                                <Setter Property="Visibility" Targetname="ExpandSite" Value="Visible"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="Right">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="Right"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="left"/>                                <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderRightheaderStyle}"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="Up">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="top"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="Bottom"/>                                <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderUpheaderStyle}"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="left">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="left"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="Right"/>                                <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderleftheaderStyle}"/>                            </Trigger>                            <Trigger Property="IsEnabled" Value="false">                                <Setter Property="Foreground" Value="{DynamicResource {x:Static Systemcolors.GrayTextBrushKey}}"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>        <Style x:Key="ExpanderWithDifferentFocusRectagle" targettype="{x:Type Expander}">            <Setter Property="Foreground" Value="{DynamicResource {x:Static Systemcolors.ControlTextBrushKey}}"/>            <Setter Property="Background" Value="transparent"/>            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>            <Setter Property="VerticalContentAlignment" Value="Stretch"/>            <Setter Property="borderBrush" Value="transparent"/>            <Setter Property="borderThickness" Value="1"/>            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate targettype="{x:Type Expander}">                        <border borderBrush="{TemplateBinding borderBrush}" borderThickness="{TemplateBinding borderThickness}" Background="{TemplateBinding Background}" CornerRadius="3" SnapsToDevicePixels="true">                            <DockPanel>                                <Togglebutton x:name="headerSite" ContentTemplate="{TemplateBinding headerTemplate}" ContentTemplateSelector="{TemplateBinding headerTemplateSelector}" Content="{TemplateBinding header}" DockPanel.Dock="top" Foreground="{TemplateBinding Foreground}" FontWeight="{TemplateBinding FontWeight}" FocusVisualStyle="{StaticResource ExpanderheaderFocusVisual}" FontStyle="{TemplateBinding FontStyle}" FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsChecked="{Binding IsExpanded,relativeSource={relativeSource TemplatedParent}}" margin="1" MinWIDth="0" MinHeight="0" padding="{TemplateBinding padding}" Style="{StaticResource ExpanderDownheaderStyle}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>                                <ContentPresenter x:name="ExpandSite" DockPanel.Dock="Bottom" Focusable="false" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" margin="{TemplateBinding padding}" Visibility="Collapsed" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>                            </DockPanel>                        </border>                        <ControlTemplate.Triggers>                            <Trigger Property="IsExpanded" Value="true">                                <Setter Property="Visibility" Targetname="ExpandSite" Value="Visible"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="Right">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="Right"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="left"/>                              <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderRightheaderStyle}"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="Up">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="top"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="Bottom"/>                                <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderUpheaderStyle}"/>                            </Trigger>                            <Trigger Property="ExpandDirection" Value="left">                                <Setter Property="DockPanel.Dock" Targetname="ExpandSite" Value="left"/>                                <Setter Property="DockPanel.Dock" Targetname="headerSite" Value="Right"/>                                <Setter Property="Style" Targetname="headerSite" Value="{StaticResource ExpanderleftheaderStyle}"/>                            </Trigger>                            <Trigger Property="IsEnabled" Value="false">                                <Setter Property="Foreground" Value="{DynamicResource {x:Static Systemcolors.GrayTextBrushKey}}"/>                            </Trigger>                        </ControlTemplate.Triggers>                    </ControlTemplate>                </Setter.Value>            </Setter>        </Style>    </Window.Resources>`

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