玩一个：可以显示任何xml树结构的xaml定义

学习中， 玩一玩。 效果如下。Xaml随后。   

<Page
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:y="clr-namespace:System.Xml;assembly=system.xml"  
  >
  <Page.Resources>
    <XmlDataProvider x:Key="xdata" Source="C:devUpgradeLog.XML">
    </XmlDataProvider>
    <HierarchicalDataTemplate x:Key="h1" ItemsSource="{Binding XPath=node()|@*}" >
      <StackPanel Orientation="Horizontal">
      <StackPanel x:Name="attrib" Visibility="Collapsed" Orientation="Horizontal">
        <TextBlock Text="@"/>
        <TextBlock Text="{Binding Path=Name}"/>
        <TextBlock Text="='"/>
        <TextBlock Text="{Binding Path=Value}"/>
        <TextBlock Text="'"/>
      </StackPanel>
      <StackPanel x:Name="ele" Visibility="Collapsed" Orientation="Horizontal">
        <TextBlock Text="{Binding Path=Name}"/>
        <TextBlock Text=" ChildCount="/>
        <TextBlock Text="{Binding Path=ChildNodes.Count}"/>
      </StackPanel>
      <StackPanel x:Name="txt" Visibility="Collapsed" Orientation="Horizontal">
        <TextBlock Text="Text()="/>
        <TextBlock Text="{Binding XPath=.}"/>
      </StackPanel>
      <StackPanel x:Name="comment" Visibility="Collapsed" Orientation="Horizontal">
        <TextBlock Text="comment()="/>
        <TextBlock Text="{Binding Path=InnerText}"/>
      </StackPanel>
      <StackPanel x:Name="pi" Visibility="Collapsed" Orientation="Horizontal">
        <TextBlock Text="pi="/>
        <TextBlock Text="{Binding Path=Name}"/>
      </StackPanel>
      </StackPanel>
      <HierarchicalDataTemplate.Triggers>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Attribute">
         <Setter  TargetName="attrib" Property="Visibility" Value="Visible"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Element">
         <Setter  TargetName="ele" Property="Visibility" Value="Visible"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Text">
         <Setter  TargetName="txt" Property="Visibility" Value="Visible"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="CDATA">
         <Setter  TargetName="txt" Property="Visibility" Value="Visible"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="Comment">
         <Setter  TargetName="comment" Property="Visibility" Value="Visible"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Path=NodeType}" Value="ProcessingInstruction">
         <Setter  TargetName="pi" Property="Visibility" Value="Visible"/>
        </DataTrigger>
      </HierarchicalDataTemplate.Triggers>
    </HierarchicalDataTemplate>
  </Page.Resources>
  <Grid>  
  <Grid.RowDefinitions>
  <RowDefinition/>
  </Grid.RowDefinitions>
  <TreeView Grid.Row="0" DataContext="{StaticResource xdata}" ItemsSource="{Binding XPath=/node()}" ItemTemplate="{StaticResource h1}"  >
  </TreeView>
  </Grid>
</Page>