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;
}

找到解决这个波马的办法了。下面的代码部分应该被添加到你的类中你需要做的地方。或者，如果需要从多个文件中获取它，可以将其放在某个静态类中。我稍微调整了一下。

#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

你可以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的内容都可以在以下网站找到：http://blogs.msdn.com/b/wpfsdk/archive/2006/05/25/606317.aspx如果您需要将HTML转换为Flow Document。不过，这稍微超出了本主题的范围。

这个答案对我来说并不太有效。如本期所述，需要包含UseShellExecute = true。因此，RequestNavigateEventHandler看起来像：

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;
}