Bind Any XML document to WPF TreeView

Question

I would like to bind any XML document to WPF TreeView using TypeConverter.

My original solution was to use recursion, but when document is large UI is heavily tied up.

Following link talks about TypeConverter but for particular node/element combination: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/edd843b7-b378-4c2d-926f-c053dbd7b340

What if not known what XML document looks like? Since this is for display purposes only I don't care much about functionality at this point I just want to bind XML to a TreeView.

Answer 1

So I have asked a question on how to bind any XML document regardless of schema to tree view in the following way: 1. Bind XML Document to WPF TreeView via XML Provider and HierarchicalDataTemplate. 2. Display all nodes of the XML Document including those that have child nodes in following format:

>Node1

Node1 Contents

    >ChildNode1

       ChildNode1 Contents

            >ChildNode1'sChildNode

              ChildNode1'sChildNode Contents

>Node2

  Node2 Contents

Problem was that my TreeView was binding each XmlNode name property to TreeItem. In case of text XmlNode it would bind #text to the TreeItem which was not what I wanted.

So via a post on MSDN forum I got my answer: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/cbdb2420-1403-436f-aa7f-b1e3b1acb398/

So the trick was to use triggers to set value based on type of node encountered.

Caveat is that other types of nodes will be ignored and XML document may contain diffrent elements, so this might not work for every type of node encountered.

Here's XAML:

<Window x:Class="WpfApplication1.Window1" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication1"
    Title="Window1" Height="250" Width="450">

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

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

public Window1()
{
InitializeComponent();
XmlDataProvider dataProvider = this.FindResource("xmlDataProvider") as XmlDataProvider;
        XmlDocument doc = new XmlDocument();
            // Testdocument        doc.LoadXml(
            @"<root>
                <child1>text1<child11>text11</child11>
                </child1>
                <child2>text2<child21>text21</child21>
                    <child22>text22</child22>
                </child2>
              </root>");
        dataProvider.Document = doc;
    }