ListBox内的WP7 TextBlock不换行 [英] WP7 TextBlock inside a ListBox not wrapping text

问题描述

我有一个 ListBox，它的 StackPanels 水平放置一个 TextBlock 和一个 Image，然后是一个ContentPresenter.这就是 XAML 的样子:

I have a ListBox which has StackPanels holding a TextBlock and an Image horizontally, followed by a ContentPresenter. This is what the XAML looks like:

<Grid x:Name="ContentPanel"
      Grid.Row="1"
      Margin="12,0,12,0">
  <ListBox x:Name="MainListBox"
           Margin="12,0,12,0"
           SelectionChanged="MainListBox_SelectionChanged">
    <ListBox.ItemTemplate>
      <DataTemplate>

        <StackPanel>
          <toolkit:ContextMenuService.ContextMenu>
            <toolkit:ContextMenu x:Name="ContextMenu"
                                 Opened="ContextMenu_Opened">
              <toolkit:MenuItem Header="edit"
                                Tag="edit"
                                Click="MenuItem_Click" />
              <toolkit:MenuItem Header="delete"
                                Tag="delete"
                                Click="MenuItem_Click" />
            </toolkit:ContextMenu>
          </toolkit:ContextMenuService.ContextMenu>
          <StackPanel Orientation="Horizontal"
                      HorizontalAlignment="Left">

            <!-- **** This text won't wrap **** -->
            <TextBlock Text="{Binding Header}"
                       TextWrapping="Wrap"
                       Style="{StaticResource PhoneTextNormalStyle}"
                       Foreground="{StaticResource PhoneAccentBrush}" />

            <Image Source="/image.png"
                   Visibility="{Binding ImageVisibility}" />

          </StackPanel>

          <ContentPresenter Content="{Binding Content}"
                            HorizontalAlignment="Stretch" />

        </StackPanel>

      </DataTemplate>
    </ListBox.ItemTemplate>
    <ListBox.ItemContainerStyle>
      <Style TargetType="ListBoxItem">
        <Setter Property="HorizontalContentAlignment"
                Value="Stretch" />
      </Style>
    </ListBox.ItemContainerStyle>
  </ListBox>
</Grid>

我将 ListBox 的 ItemsSource 设置为页面构造函数中的 ObservableCollection.一切正常，直到 Header 文本变得太长，在这种情况下，它不会像我指定的那样换行.如何强制 TextBlock 换行?

I'm setting the ItemsSource of the ListBox to an ObservableCollection within the page constructor. Everything works fine until the Header text becomes too long, in which case it is not wrapping as I've specified it to. How can I force the TextBlock to wrap the text?

感谢您的帮助！

推荐答案

这可能是因为没有限制 TextBlock 的宽度，所以它在你看不到的屏幕上水平增长.

This is likely a result of not restricting the width of the TextBlock, so it is growing horizontaly off screen where you can't see it.

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