如何修改ListViewItem模板中的RichTextBox使其文本横向显示？

你的RichTextBox文本呈现纵向显示，核心原因是未明确指定FlowDocument的排版方向，或其内容容器宽度未适配控件。以下是修正后的完整Style代码：

<Style TargetType="ListViewItem" x:Key="InformationListItemTheme">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate>
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="100"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="175"/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Column="0"/>
                    <!-- 修正后的RichTextBox -->
                    <RichTextBox Grid.Column="1" Height="275">
                        <RichTextBox.Document>
                            <FlowDocument PageWidth="{Binding RelativeSource={RelativeSource AncestorType=RichTextBox}, Path=ActualWidth}"
                                         FlowDirection="LeftToRight">
                                <Paragraph>
                                    <!-- 在此处添加或绑定文本内容 -->
                                </Paragraph>
                            </FlowDocument>
                        </RichTextBox.Document>
                    </RichTextBox>
                    <Grid Grid.Column="2">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition/>
                            <RowDefinition/>
                            <RowDefinition/>
                            <RowDefinition/>
                        </Grid.RowDefinitions>
                        <TextBlock Grid.Column="0" Grid.Row="0" Text="JA"/>
                        <TextBlock Grid.Column="0" Grid.Row="1" Text="SCH"/>
                        <TextBlock Grid.Column="0" Grid.Row="2" Text="ELT"/>
                        <TextBlock Grid.Column="0" Grid.Row="3" Text="KIN"/>
                        <TextBlock  Grid.Column="0" Grid.Row="4" Text="SON"/>
                        <TextBox Grid.Column="1" Grid.Row="0" Text="{Binding JA}"/>
                        <TextBox Grid.Column="1" Grid.Row="1" Text="{Binding SCH}"/>
                        <TextBox Grid.Column="1" Grid.Row="2" Text="{Binding ELT}"/>
                        <TextBox Grid.Column="1" Grid.Row="3" Text="{Binding KIN}"/>
                        <TextBox Grid.Column="1" Grid.Row="4" Text="{Binding SON}"/>
                    </Grid>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

关键修改说明： #

• 为RichTextBox显式添加FlowDocument节点，设置FlowDirection="LeftToRight"，强制文本采用横向排版逻辑
• 将FlowDocument的PageWidth绑定到RichTextBox的ActualWidth，让内容容器宽度与控件自身宽度匹配，文本会自动横向换行，而非纵向堆叠

内容的提问来源于stack exchange，提问作者stutski