WPF超级链接

<Label Canvas.Left="29"  Canvas.Top="320" x:Name="productLink" x:Uid="productLink" Style="{StaticResource LinkLabelStyle}" >    
        <Label.Content>               
              <Hyperlink x:Name="hyperlink" x:Uid="hyperlink" NavigateUri="http://www.mtdzsp.com"  Style="{StaticResource LinkLabelStyle}"
                              Hyperlink.RequestNavigate="hyperlink_RequestNavigate">                   
              <TextBlock Text="更多" Foreground="Black"/>               
             </Hyperlink>           
        </Label.Content>      
</Label>

     private void hyperlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
        {
            if (e.Uri != null && string.IsNullOrEmpty(e.Uri.OriginalString) == false)
            {
                string uri = e.Uri.AbsoluteUri;
                Process.Start(new ProcessStartInfo(uri));
                e.Handled = true;
              
            }
        }