Xml Viewer in WinForms application

We can create a XmlViewer using a WPF user control and use it in our windows forms application.

Create a new class library project and add a WPF user control called XmlViewer

<UserControl x:Class="Viewer.XmlViewer"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:xmlstack="clr-namespace:System.Xml;assembly=System.Xml"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <UserControl.Resources>

        <SolidColorBrush Color="Blue" x:Key="xmlValueBrush"/>

        <SolidColorBrush Color="Red" x:Key="xmAttributeBrush"/>

        <SolidColorBrush Color="DarkMagenta" x:Key="xmlTagBrush"/>

        <SolidColorBrush Color="Blue" x:Key="xmlMarkBrush"/>

        <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>

        <Style TargetType="{x:Type TreeViewItem}">

            <Setter Property="IsExpanded" Value="True"/>

        </Style>

        <HierarchicalDataTemplate x:Key="treeViewTemplate" 

                                  ItemsSource="{Binding XPath=child::node()}">

            <StackPanel Orientation="Horizontal" Margin="3,0,0,0" 

                        HorizontalAlignment="Center">

                <TextBlock Text="&lt;" HorizontalAlignment="Center" 

                           Foreground="{StaticResource xmlMarkBrush}" 

                           x:Name="startTag"/>

                <TextBlock Text="{Binding Path=Name}"

                    Margin="0"

                    HorizontalAlignment="Center"

                    x:Name="xmlTag"

                    Foreground="{StaticResource xmlTagBrush}"/>

                <ItemsControl

                    ItemTemplate="{StaticResource attributeTemplate}"

                    ItemsSource="{Binding Path=Attributes}"

                    HorizontalAlignment="Center">

                    <ItemsControl.ItemsPanel>

                        <ItemsPanelTemplate>

                            <StackPanel Orientation="Horizontal"/>

                        </ItemsPanelTemplate>

                    </ItemsControl.ItemsPanel>

                </ItemsControl>

                <TextBlock Text="&gt;" HorizontalAlignment="Center" 

                           Foreground="{StaticResource xmlMarkBrush}" 

                           x:Name="endTag"/>

            </StackPanel>

            <HierarchicalDataTemplate.Triggers>

                <DataTrigger Binding="{Binding NodeType}">

                    <DataTrigger.Value>

                        <xmlstack:XmlNodeType>Text</xmlstack:XmlNodeType>

                    </DataTrigger.Value>

                    <Setter Property="Text" Value="{Binding InnerText}" 

                            TargetName="xmlTag"/>

                    <Setter Property="Foreground" Value="Blue" 

                            TargetName="xmlTag"/>

                    <Setter Property="Visibility" Value="Collapsed" 

                            TargetName="startTag"/>

                    <Setter Property="Visibility" Value="Collapsed" 

                            TargetName="endTag"/>

                </DataTrigger>

                <DataTrigger Binding="{Binding HasChildNodes}" Value="False">

                    <Setter Property="Text" Value="/&gt;" TargetName="endTag"/>

                </DataTrigger>

            </HierarchicalDataTemplate.Triggers>

        </HierarchicalDataTemplate>

    </UserControl.Resources>

    <Grid>

        <TreeView Grid.Row="2" Grid.ColumnSpan="2" Name="xmlTree" 

                  ItemTemplate="{StaticResource treeViewTemplate}"/>

    </Grid>

</UserControl>

The code behind for the above user control as shown below:

public partial class XmlViewer : UserControl

{

    private XmlDocument xmldocument;

    public XmlViewer()

    {

        InitializeComponent();

    }

    public XmlDocument XmlDocument

    {

        get { return xmldocument; }

        set

        {

            xmldocument = value;

            BindXmlDocument();

        }

    }

    private void BindXmlDocument()

    {

        if (xmldocument == null)

        {

            xmlTree.ItemsSource = null;

            return;

        }

        var provider = new XmlDataProvider {Document = xmldocument};

        var binding = new Binding {Source = provider, XPath = "child::node()"};

        xmlTree.SetBinding(ItemsControl.ItemsSourceProperty, binding);

    }

}

Once you are done with the above things now build the project. Now create a new Windows Forms project and add a reference of this Dll. Now open a form and add a WPF Interoperability control called ElementHost. Once you add this then you can see in the select hosted content dropdown the XmlViewer control. If you dont find it just try building your project once and it should come up. Now in the code behind of your forms control do the following:

private void btnBrowse_Click(object sender, EventArgs e)

        {

                XmlDocument XMLdoc = new XmlDocument();

                try

                {

                    XMLdoc.Load(@"C:\Sample.xml");

                }

                catch (XmlException)

                {

                    MessageBox.Show("The XML file is invalid");

                    return;

                }

                ((XmlViewer) wpfElementHost.Child).XmlDocument = XMLdoc;

        }