如何使用HierarchicalDataTemplate显示XML元素和属性？

Question

我想在TreeView中显示任意XML,扩展和折叠节点,显示元素名称和属性集及其值.我想我可以使用HierarchicalDataTemplate来做到这一点.

我已经看到使用HierarchicalDataTemplate显示任意XML 元素和文本节点的提示,如下所示:

  <Window.Resources>
    <HierarchicalDataTemplate x:Key="NodeTemplate">
      <TextBlock x:Name="tbName" Text="?" />
      <HierarchicalDataTemplate.ItemsSource>
        <Binding XPath="child::node()" />
      </HierarchicalDataTemplate.ItemsSource>
      <HierarchicalDataTemplate.Triggers>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Text">
          <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Value}"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Element">
          <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Name}"/>
        </DataTrigger>
      </HierarchicalDataTemplate.Triggers>
    </HierarchicalDataTemplate>
    <XmlDataProvider x:Key="xmlDataProvider">
    </XmlDataProvider>
  </Window.Resources>
  ....

  <TreeView Name="treeView1"
          ItemsSource="{Binding Source={StaticResource xmlDataProvider}, XPath=*}"
          ItemTemplate= "{StaticResource NodeTemplate}"/>

哪个效果很好.它显示每个元素的元素名称和文本.但我的XML使用属性来传递信息.模式很复杂,我没有正式的定义,所以现在我将它视为任意XML.

最简单的文档如下所示:

<c4soap name="GetVersionInfo" seq="" result="1">
  <versions>
    <version name="Director" 
             version="2.1.0.126418" 
             buildtype="" 
             builddate="Jun  1 2011" buildtime="14:52:43" />
    <version name="MediaManager" 
             version="2.1.0.126418" 
             buildtype="" 
             builddate="Jun  1 2011" 
             buildtime="14:36:17" />
  </versions>
</c4soap>

使用上面的HierarchicalDataTemplate定义,我得到一个显示:

不是我想要的.对于每个节点,我想显示元素名称和属性集及其值.

我试过这个:

  <Window.Resources>
    <HierarchicalDataTemplate x:Key="NodeTemplate">
      <WrapPanel
          Focusable="False">
        <TextBlock x:Name="tbName" Text="?" />
        <TextBlock x:Name="tbAttrs" Text="?" />
      </WrapPanel>
      <HierarchicalDataTemplate.ItemsSource>
        <Binding XPath="child::node()" />
      </HierarchicalDataTemplate.ItemsSource>
      <HierarchicalDataTemplate.Triggers>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Text">
          <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Value}"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Element">
          <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Name}"/>
          <Setter TargetName="tbAttrs" Property="Text" Value="{Binding Path=Attributes}"/>
        </DataTrigger>
      </HierarchicalDataTemplate.Triggers>
    </HierarchicalDataTemplate>
    <XmlDataProvider x:Key="xmlDataProvider">
    </XmlDataProvider>
  </Window.Resources>

...让我有点接近,但 Value="{Binding Path=Attributes}"结果是在TreeView中显示"(Collection)".

除了元素名称之外,我怎样才能简单地显示所有实际的属性名称和值？

Answer 1

我ItemsControl在模板中添加了一个,如下所示:

<Window.Resources>
  <SolidColorBrush x:Key="xmlValueBrush" Color="Blue" />
  <SolidColorBrush x:Key="xmAttributeBrush" Color="Red" />
  <SolidColorBrush x:Key="xmlTagBrush" Color="DarkMagenta" />
  <SolidColorBrush x:Key="xmlMarkBrush" Color="Blue" />
  <DataTemplate x:Key="attributeTemplate">
    <StackPanel Orientation="Horizontal"
                Margin="3,0,0,0"
                HorizontalAlignment="Center">
      <TextBlock Text="{Binding Path=Name}"
                 Foreground="{StaticResource xmAttributeBrush}"/>
      <TextBlock Text="=&quot;"
                 Foreground="{StaticResource xmlMarkBrush}"/>
      <TextBlock Text="{Binding Path=Value}"
                 Foreground="{StaticResource xmlValueBrush}"/>
      <TextBlock Text="&quot;"
                 Foreground="{StaticResource xmlMarkBrush}"/>
    </StackPanel>
  </DataTemplate>

  <HierarchicalDataTemplate x:Key="nodeTemplate">
    <StackPanel Orientation="Horizontal"
        Focusable="False">
      <TextBlock x:Name="tbName" Text="?" />
      <ItemsControl
          ItemTemplate="{StaticResource attributeTemplate}"
          ItemsSource="{Binding Path=Attributes}"
          HorizontalAlignment="Center">
        <ItemsControl.ItemsPanel>
          <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal"/>
          </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
      </ItemsControl>
    </StackPanel>
    <HierarchicalDataTemplate.ItemsSource>
      <Binding XPath="child::node()" />
    </HierarchicalDataTemplate.ItemsSource>
    <HierarchicalDataTemplate.Triggers>
      <DataTrigger Binding="{Binding Path=NodeType}" Value="Text">
        <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Value}"/>
      </DataTrigger>
      <DataTrigger Binding="{Binding Path=NodeType}" Value="Element">
        <Setter TargetName="tbName" Property="Text" Value="{Binding Path=Name}"/>
      </DataTrigger>
    </HierarchicalDataTemplate.Triggers>
  </HierarchicalDataTemplate>
  <XmlDataProvider x:Key="xmlDataProvider">
  </XmlDataProvider>
</Window.Resources>

现在它显示元素名称和属性集及其值,如下所示: