如何为 TextBlock 设置正确的换行样式？

Question

我需要将完整的换行文本写入 WPF Textblock。条件是我们不知道文本长度以及窗口大小。

我的 XAML 是：

<Border BorderThickness="1" CornerRadius="6" BorderBrush="#FF405DEF" Padding="5" Margin="5">
        <StackPanel Orientation="Horizontal">
            <Image  HorizontalAlignment="Left" Source="{Binding Path=User.ProfileImageUrl}"  Width="48" Height="48"
                    Name="UserAvatarImage" Stretch="Fill" VerticalAlignment="Top"  />
            <StackPanel Margin="5,0,0,5" Orientation="Vertical" Grid.Column="1"  HorizontalAlignment="Left" Name="stackPanel1" VerticalAlignment="Top" Width="413">
                <StackPanel Orientation="Horizontal" >
                    <StackPanel Orientation="Horizontal" >
                        <TextBlock Name="UserNameTextBlock"  Margin="0,0,10,0"  Text="{Binding Path=User.Name}" FontWeight="Bold">UserName</TextBlock>
                        <TextBlock   Foreground="LightGray" >@</TextBlock>
                        <TextBlock   Name="ScreenNameTextBlock"  Text="{Binding Path=User.ScreenName}" Foreground="Gray" >ScreenName</TextBlock>
                    </StackPanel>
                </StackPanel>
                <StackPanel Orientation="Horizontal"  Margin="0,5,0,0">
                    <Grid >
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="2*" />
                            <ColumnDefinition Width="2*" />
                        </Grid.ColumnDefinitions>
                        <TextBlock Margin="0,0,0,0" Foreground="Blue" TextWrapping="Wrap">@ToUserName</TextBlock>
                        <StackPanel Grid.Column="1">
                            <TextBlock Margin="5,0,0,0" Text="{Binding Path=Text}" MinHeight="20"  MinWidth="200" 
                                       VerticalAlignment="Stretch" TextWrapping="WrapWithOverflow">START skf skdjf skdj hfskdjf ksdjhf ksjdhf ksjhf kjsf kjshf kjshkjfhsdf kjsfdkj hskdfj hskdjf hskdjf skjhfksjfks END</TextBlock>
                        </StackPanel>    
                    </Grid>
                </StackPanel>
            </StackPanel>
        </StackPanel>
    </Border>

所以我需要这个：

这是通过硬编码值Width="300"

Answer 1

我假设这与您的其他问题有关将一个控件的MaxWidth绑定到另一个控件的 ActualWidth

在您的情况下，我会将 Horizo​​ntal StackPanel 替换为 Grid 因为 Grid 会限制其子项的大小到可用空间，而 StackPanel 则没有。这样，TextBlock 就不需要设置 MaxWidth 属性来正确换行。