Question

如何将ListBoxItems上的默认边框设为虚线边框？请参阅以下样式设置方式：

<Grid.Resources>
    <Style TargetType="{x:Type ListBoxItem}">
        <Setter Property="Height" Value="30" />
        <Setter Property="BorderThickness" Value="0,0,0,1" />
        <Setter Property="BorderBrush" Value="Silver" />
        <Setter Property="Content" Value="" />
        <Style.Triggers>
            <Trigger Property="ItemsControl.AlternationIndex" Value="3">
                <Setter Property="BorderBrush" Value="Black"></Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
</Grid.Resources>

这里我将AlternationIndex 0,1和2设为虚线边框而不是实线。怎么办呢？

Answer 1

试试这个：

<Window.Resources>
        <SolidColorBrush x:Key="SelectedBackgroundBrush" Color="#DDD" />
        <SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888" />
        <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="#EEE" />
        <!-- SimpleStyles: ListBoxItem -->
        <Style TargetType="ListBoxItem" x:Key="ListBoxItemTemplate">
            <Setter Property="SnapsToDevicePixels" Value="true"/>
            <Setter Property="OverridesDefaultStyle" Value="true"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Grid>
                            <Rectangle x:Name="Rectangle" Fill="Transparent" Stroke="Black" 
                                       StrokeDashCap="Square" StrokeThickness="0" SnapsToDevicePixels="True">
                                <Rectangle.StrokeDashArray>
                                    <sys:Double>5</sys:Double>
                                </Rectangle.StrokeDashArray>
                            </Rectangle>
                            <Border 
                                Name="Border"
                                Padding="2"
                                BorderThickness="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness}"
                                BorderBrush="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderBrush}">
                                <ContentPresenter />
                            </Border>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter TargetName="Rectangle" Property="StrokeThickness" Value="1" />
                                <Setter TargetName="Border" Property="BorderThickness" Value="0" />
                            </Trigger>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter TargetName="Rectangle" Property="Fill" Value="{StaticResource SelectedBackgroundBrush}" />
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="{x:Type ListBoxItem}" BasedOn="{StaticResource ListBoxItemTemplate}">
            <Setter Property="Height" Value="30" />
            <Setter Property="BorderThickness" Value="0,0,0,1" />
            <Setter Property="BorderBrush" Value="Silver" />
            <Style.Triggers>
                <Trigger Property="ItemsControl.AlternationIndex" Value="3">
                    <Setter Property="BorderBrush" Value="Black"></Setter>
                </Trigger>
            </Style.Triggers>
        </Style>

    </Window.Resources>
    <StackPanel>
        <ListBox>
            <ListBoxItem Content="Item 1" />
            <ListBoxItem Content="Item 2" />
            <ListBoxItem Content="Item 3" />
            <ListBoxItem Content="Item 4" />
        </ListBox>
    </StackPanel>

所以我在控件模板的实际边框下面放了一个矩形。矩形的边框可以是虚线，或者是虚线或者是w / e（为了使虚线变小，只需将零件更改为2,1不明显）。因此，矩形边框粗细的默认值为0，但选中后，我将厚度设置为1，使其可见。我将一些边框属性绑定到其模板化的父级，因此它看起来就像你在你的风格上设置的那样（刷银，厚度为0,0,0,1）。

WPF中ListBoxItem上的虚线边框

1 个答案: