Question

我试图绑定来自XML文件的数据，我跟着来自mdsn和其他在线资源但是我一直收到错误，如果我将数据绑定到列表框就可以了。

  public void LoadPage()
    {
        XDocument loadedData = XDocument.Load("page01.xml");

        var data = from query in loadedData.Descendants("page")
                   select new PageReader
                   {
                       PageNumber = (int)query.Element("pnumber"),
                       ChapterTitle = (string)query.Element("ctitle"),   
                       ChapterNumber = (int)query.Element("cnumber")
                   };

        LayoutRoot.DataContext = data;
    }

和XAML

  Grid x:Name="LayoutRoot" Background="#FFFFFEFE">
    <StackPanel>
        <Grid>
            <Rectangle Fill="#FF424242" HorizontalAlignment="Left" Height="60" Stroke="Black" VerticalAlignment="Top" Width="480"/>
            <StackPanel Orientation="Horizontal">
                <TextBlock Width="100"  TextWrapping="Wrap" MaxWidth="100" MaxHeight="58" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#FFB6AEAE" FontFamily="{StaticResource lob2}" Text="{Binding ChapterNumber}"/>
                <TextBlock Width="280"  TextWrapping="Wrap" MaxWidth="300" MaxHeight="58" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#FFB6AEAE" FontFamily="{StaticResource lob2}" Text="{Binding ChapterTitle}"/>
                <TextBlock Width="100"  TextWrapping="Wrap" MaxWidth="100" MaxHeight="58" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#FFB6AEAE" FontFamily="{StaticResource lob2}" Text="{Binding PageNumber}"/>
            </StackPanel>
        </Grid>
        <Grid Height="30"></Grid>
        <TextBlock x:Name="PageText" Height="640" ScrollViewer.VerticalScrollBarVisibility="Visible"></TextBlock>
    </StackPanel>




</Grid>

Answer 1

您的data类型为IEnumerable<PageReader>，这就是为什么它适用于ListBox，因为ListBox期待收藏。

如果你改变了

LayoutRoot.DataContext = data;

到

LayoutRoot.DataContext = data.FirstOrDefault();

至少你应该看到UI上显示了一些数据。

数据不会绑定WP

1 个答案: