WPF Xaml hyperlink's RequestNavigate event handler not found

Question

I have a WPF user control with its code behind file containing the initialization stuff.

I am using the user control as an activeX component inside a different application. 

XAML for the control is constructed within the other application and is applied to the user control programatically.

 

Hyperlinks within the XAML are not working and I found that I need to add the RequestNavigate event handler to get the hyperlink working.

 

I have added the required event handler inside the code behind and added an x:Class attribute to XAML with the namespace and class name.

I get an error message that the RequestNavigate event handler is not found.

 

'Windows.Forms.Integration.WpfControl' does not contain a definition for 'Hyperlink_RequestNavigate' and no extension method 'Hyperlink_RequestNavigate' accepting a first argument of type 'Windows.Forms.Integration.WpfControl' could be found (are you missing a using directive or an assembly reference?) 

 

Can anyone please help?

 

Here is my code behind:

 

namespace Windows.Forms.Integration
{
    public partial class WpfControl : UserControl
    {
        internal const string PREFIX = "WPFControl-";
        private string mstrXamlFile, mstrXaml;
        private bool mblnInitialized;
        private string mstrUid;

        private static IDictionary<string, WpfControl> sobjWPFControls = new Dictionary<string, WpfControl>(StringComparer.OrdinalIgnoreCase);
        private static IDictionary<string, ObjectInstance> sobjObjectInstances = new Dictionary<string, ObjectInstance>(StringComparer.OrdinalIgnoreCase);

        public string ErrorMessage { get; set; }

        public static string WpfControlAssemblyVersion { get { return AssemblyInfo.VersionNumber; } }
        public WpfControl()
        {
            InitializeComponent();
            mstrUid = PREFIX + Guid.NewGuid().ToString();
            sobjWPFControls.Add(mstrUid, this);
            InitializeXaml();

            mblnInitialized = true;
            lblErrorMessage.Text = ErrorMessage;
        }

        public void Hyperlink_RequestNavigate(object sender, RequestNavigateEventArgs e)
        {
            Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri));
            e.Handled = true;
        }

        private void InitializeXaml()
        {
            System.Windows.UIElement objUIElement = null;
            lblErrorMessage.Visible = false;
            try
            {
                if (!string.IsNullOrEmpty(mstrXamlFile))
                    mstrXaml = File.ReadAllText(mstrXamlFile);
                if (!string.IsNullOrEmpty(mstrXaml))
                    objUIElement = XamlReader.Parse(mstrXaml) as System.Windows.UIElement;
            }
            catch (XamlParseException exc)
            {

            }


        }



    }


}

Here is a sample XAML:

 

<UserControl
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:system="clr-namespace:System;assembly=mscorlib"
        xmlns:interactivity="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
        xmlns:ti="clr-namespace:Windows.Forms.Integration;assembly=Windows.Forms.Integration"
        xmlns:inlineImage="clr-namespace:Windows.Forms.Integration;assembly=Windows.Forms.Integration"
        x:Class="Windows.Forms.Integration.WpfControl"
        mc:Ignorable="d"
        Background="White">
    <UserControl.Resources>
        <RadialGradientBrush x:Key="LightGrayBackground" GradientOrigin="0.2,0.2" RadiusX="1" RadiusY="1">
            <GradientStop Color="White"  Offset="0"/>
            <GradientStop Color="Gray" Offset="1"/>
        </RadialGradientBrush>
        <SolidColorBrush x:Key="MarketColor" Color="#FF6BBE6B"/>
        <SolidColorBrush x:Key="BidColor" Color="LightBlue"/>
        <SolidColorBrush x:Key="DesignColor" Color="#FF7C7CE2"/>
        <SolidColorBrush x:Key="BuildColor" Color="#FFCB94CB"/>
        <SolidColorBrush x:Key="InstallColor" Color="LightCoral"/>
        <SolidColorBrush x:Key="ServiceColor" Color="LightSalmon"/>
        <SolidColorBrush x:Key="ActivityBackground" Color="White"/>

        <ControlTemplate x:Key="TitleLabel" TargetType="Label">
            <Grid Margin="4">
                <Rectangle Stroke="Blue" StrokeThickness="0" RadiusX="4" RadiusY="4" Fill="{TemplateBinding Background}">
                    <Rectangle.Effect>
                        <DropShadowEffect />
                    </Rectangle.Effect>
                </Rectangle>
                <Label Content="{TemplateBinding Content}" Foreground="White" Margin="4" HorizontalAlignment="Center" FontSize="16" />
            </Grid>
        </ControlTemplate>

        <ControlTemplate x:Key="ProcessExpander" TargetType="Expander">
            <Grid Margin="4">
                <Rectangle RadiusX="4" RadiusY="4" Fill="{TemplateBinding Background}">
                    <Rectangle.Effect>
                        <DropShadowEffect />
                    </Rectangle.Effect>
                </Rectangle>
                <Expander Content="{TemplateBinding Content}">
                    <Expander.Header>
                        <Label Content="{TemplateBinding Header}" HorizontalAlignment="Center" FontSize="14" />
                    </Expander.Header>
                </Expander>
            </Grid>
        </ControlTemplate>

        <ControlTemplate x:Key="ActivityLabel" TargetType="Label">
            <Border Background="White" Margin="4,1,4,1" Opacity="0.7">
                <TextBlock Text="{TemplateBinding Content}" TextWrapping="WrapWithOverflow" Margin="1" TextAlignment="Center" />
            </Border>
        </ControlTemplate>

        <ControlTemplate x:Key="ActivityLinkLabel" TargetType="Label">
            <Border Margin="2,2,2,2">
                <TextBlock VerticalAlignment="Center" Text="{TemplateBinding Content}" TextWrapping="Wrap" Margin="1" TextAlignment="Center" FontSize="2.5">
                    <interactivity:Interaction.Behaviors>
                        <ti:NavigateBehavior Name="{Binding Path=Name, RelativeSource={RelativeSource TemplatedParent}}" Url="{Binding Path=Tag, RelativeSource={RelativeSource TemplatedParent}}" />
                    </interactivity:Interaction.Behaviors>
                </TextBlock>
            </Border>
        </ControlTemplate>

    </UserControl.Resources>
    <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
        <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
            <TextBlock Margin="4,10,4,4" Text="3.3.1.3 Generate sales forecast - A (10136) 3" TextWrapping="Wrap" FontWeight="Bold" FontSize="16" Foreground="#5F5FAF" />
            <FlowDocumentScrollViewer HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden" HorizontalAlignment="Left" HorizontalContentAlignment="Left" Width="Auto">
                <FlowDocument  TextAlignment="Left" FontFamily= 'Verdana' FontSize= '11' LineHeight= '5' PageWidth= '1000'>
                    <Section xml:space="preserve" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
                        <Paragraph>
                            <Hyperlink NavigateUri="https://www.google.com" RequestNavigate="Hyperlink_RequestNavigate">test url</Hyperlink>
                        </Paragraph>
                    </Section>
                </FlowDocument>
            </FlowDocumentScrollViewer>
            <Viewbox VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
                <Grid HorizontalAlignment="Stretch">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <StackPanel Grid.Row="0" Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                        <Canvas Grid.Row="1" Grid.Column="0" Margin="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="0.00" Height="0.00">
                            <Canvas.LayoutTransform>
                                <ScaleTransform ScaleX="3.50" ScaleY="3.50" />
                            </Canvas.LayoutTransform>
                        </Canvas>
                        <TextBlock Margin="4" Width="Auto" Text="Version 1.0 | Status Open | Rendered 5/31/2016 07:09:24 am. Click Refresh to update the view." TextWrapping="Wrap" FontSize="12" TextAlignment="Left" />
                    </StackPanel>
                </Grid>
            </Viewbox>
        </StackPanel>
    </ScrollViewer>
</UserControl>