如何获取 FlowDocument 超链接来启动浏览器并转到 WPF 应用程序中的 URL？

Question

WPF 应用程序中的以下代码创建一个超链接，其外观和行为类似于超链接，但单击时不会执行任何操作。

我需要更改什么才能在单击它时打开默认浏览器并转到指定的 URL？

替代文本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>

代码隐藏：

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;
        }
    }
}

Answer 1

我找到了这个问题的答案，你必须添加 RequestNavigate 并自己处理：

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;
}

Answer 2

找到了这个 Poma 的解决方案。下面的代码部分应添加到您需要执行此操作的类中。或者，如果您需要从多个文件中获取它，您可以将其放在某个静态类中。我已经根据我正在做的事情稍微调整了它。

    #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

您将在代码中这样调用它：

        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;

所有 HTMLConverter 内容都可以在以下位置找到：http://blogs.msdn.com/b/wpfsdk/archive/2006/05/25/606317.aspx
如果您需要将 HTML 转换为流文档。不过，这稍微超出了本主题的范围。

Answer 3

接受的答案对我来说不太有效。如此问题中详细介绍，UseShellExecute = true。因此，RequestNavigateEventHandler 将如下所示：

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;
}