14

The following code in a WPF app creates a hyperlink that looks and acts like a hyperlink, but doesn't do anything when clicked.

What do I have to change so that when I click it, it opens the default browser and goes to the specified URL?

alt text http://www.deviantsart.com/upload/4fbnq2.png

XAML:

<Window x:Class="TestLink238492.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <StackPanel Margin="10">
        <ContentControl x:Name="MainArea"/>
    </StackPanel>
</Window>

Code Behind:

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;

namespace TestLink238492
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();

            FlowDocumentScrollViewer fdsv = new FlowDocumentScrollViewer();

            FlowDocument doc = new FlowDocument();
            fdsv.Document = doc;
            fdsv.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;
            doc.PagePadding = new Thickness(0);
            Paragraph paragraph = new Paragraph();
            doc.Blocks.Add(paragraph);

            Run run = new Run("this is flow document text and ");
            paragraph.Inlines.Add(run);

            Run run2 = new Run("this is a hyperlink");
            Hyperlink hlink = new Hyperlink(run2);
            hlink.NavigateUri = new Uri("http://www.google.com");
            paragraph.Inlines.Add(hlink);

            StackPanel sp = new StackPanel();
            TextBlock tb = new TextBlock();
            tb.Text = "this is textblock text";
            sp.Children.Add(tb);
            sp.Children.Add(fdsv);

            MainArea.Content = sp;
        }
    }
}
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1

3 Answers 3

Reset to default
18

I found the answer to this one, you have to add RequestNavigate and handle it yourself:

Run run2 = new Run("this is a hyperlink");
Hyperlink hlink = new Hyperlink(run2);
hlink.NavigateUri = new Uri("http://www.google.com");
hlink.RequestNavigate += new System.Windows.Navigation.RequestNavigateEventHandler(hlink_RequestNavigate);
paragraph.Inlines.Add(hlink);


void hlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
{
    Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri));
    e.Handled = true;
}
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1 Comment

And what if I load document from RTF?
12

Got the solutions for this Poma. The code section below should be added to your class where you need to do this. Or you can put it in a static class somewhere if you need to get to it from multiple files. I've tweaked it slightly for what I'm doing.

    #region Activate Hyperlinks in the Rich Text box
    //http://stackoverflow.com/questions/5465667/handle-all-hyperlinks-mouseenter-event-in-a-loaded-loose-flowdocument
    void SubscribeToAllHyperlinks(FlowDocument flowDocument)
    {
        var hyperlinks = GetVisuals(flowDocument).OfType<Hyperlink>();
        foreach (var link in hyperlinks)
            link.RequestNavigate += new System.Windows.Navigation.RequestNavigateEventHandler(link_RequestNavigate);
    }

    public static IEnumerable<DependencyObject> GetVisuals(DependencyObject root)
    {
        foreach (var child in LogicalTreeHelper.GetChildren(root).OfType<DependencyObject>())
        {
            yield return child;
            foreach (var descendants in GetVisuals(child))
                yield return descendants;
        }
    }

    void link_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
    {
        //http://stackoverflow.com/questions/2288999/how-can-i-get-a-flowdocument-hyperlink-to-launch-browser-and-go-to-url-in-a-wpf
        Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri));
        e.Handled = true;
    }
    #endregion Activate Hyperlinks in the Rich Text box

You'll call it in your code like this:

        string xaml = HTMLConverter.HtmlToXamlConverter.ConvertHtmlToXaml(this.itemControl.NotificationItem.Body, true);
        FlowDocument flowDocument = XamlReader.Load(new XmlTextReader(new StringReader(xaml))) as FlowDocument;
        SubscribeToAllHyperlinks(flowDocument);
        bodyFlowDocument.Document = flowDocument;

All the HTMLConverter stuff can be found at: http://blogs.msdn.com/b/wpfsdk/archive/2006/05/25/606317.aspx That's if you need to convert HTML to a Flow Document. Although, that's slightly out of the scope of this topic.

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1 Comment

At firts, this solution didn't work for me, all the hyperlinks were disabed. Only after I changed SubscribeToAllHyperlinks and used link.Command instead of an event handler, everything worked smoothly. I am using .Net 4.5, maybe this makes a difference.
0

The accepted answer did not quite work for me. As detailed in this issue, UseShellExecute = true needs to be included. Thus, the RequestNavigateEventHandler will look like:

void hlink_RequestNavigate(object sender, RequestNavigateEventArgs e) {
    var sInfo = new System.Diagnostics.ProcessStartInfo(e.Uri.AbsoluteUri);
    sInfo.UseShellExecute = true;
    System.Diagnostics.Process.Start(sInfo);
    e.Handled = true;
}
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