TextBlock Wrap和scrollView

Question

以下代码效果不错，但即使ScrollBar内有大文本，也会禁用垂直TextBlock。我该如何启用它？

 <UserControl.DataContext>
        <viewModels:CommentsViewModel/>
    </UserControl.DataContext>
    <Grid>
        <DockPanel >
            <TreeView DockPanel.Dock="Top"/>
            <Expander Header="Yo" DockPanel.Dock="Bottom" VerticalAlignment="Bottom">
                <ScrollViewer HorizontalScrollBarVisibility="Disabled">
                    <TextBlock TextWrapping="Wrap"  MaxHeight="250" 
                         Text="{Binding Article.Article.Content}"/>
                </ScrollViewer>
            </Expander>
        </DockPanel>
    </Grid>

Answer 1

我找到了。

MaxHeight="250" 

标记应该不在TextBlock中，但应该在Grid中以限制高度。然后它将完美地运作。

<UserControl.DataContext>
    <viewModels:CommentsViewModel/>
</UserControl.DataContext>
<Grid>
    <DockPanel >
        <TreeView DockPanel.Dock="Top"/>
        <Expander Header="Yo" DockPanel.Dock="Bottom" VerticalAlignment="Bottom">
            <Grid MaxHeight="250"> 
            <ScrollViewer HorizontalScrollBarVisibility="Disabled">
                <TextBlock TextWrapping="Wrap"   
                     Text="{Binding Article.Article.Content}"/>
            </ScrollViewer>
            </Grid>
        </Expander>
    </DockPanel>
</Grid>

Answer 2

如果您只是显示文字，请确保它可以使用TextBox：

        <Expander Header="Yo" DockPanel.Dock="Bottom" VerticalAlignment="Bottom">
            <Grid IsReadOnly="True">
                <TextBox TextWrapping="Wrap"  MaxHeight="250" 
                     Text="{Binding Article.Article.Content}"/>
            </Grid>
        </Expander>