Steps:

  1. Create a blank windows store 8.1 app.

  2. Add a WebView and RichEditBox in xaml of the page.
    1. <WebView Height="500" x:Name="webView" Loaded="webView_Loaded" NavigationCompleted="webView_NavigationCompleted" Width="500" HorizontalAlignment="Left" />
    2. <RichEditBox x:Name="richEditBox" Width="500" Height="500" HorizontalAlignment="Right" />
  3. I have tried this for html string as it’s is easy to add script in html.
    1. public static string GetHTML()
    2. {
    3. return "<html>" +
    4. "<head>" +
    5. "<script type='text/javascript'>" +
    6. "function select_body() " +
    7. "{" +
    8. "var range = document.body.createTextRange(); " +
    9. "range.select();" +
    10. "}" +
    11. "</script>" +
    12. "<body>" +
    13. "<h1>My First Heading</h1>" +
    14. "<p>My first paragraph.</p>" +
    15. "</body></head></html>";
    16. }
  4. Now navigate webview to the html string.
    1. private void webView_Loaded(object sender, RoutedEventArgs e)
    2. {
    3. webView.NavigateToString(GetHTML());
    4. }
  5. When the webPage is navigated we can notify a script and get rtf from webview.
    private async void webView_NavigationCompleted(WebView sender,
    1. WebViewNavigationCompletedEventArgs args)
    2. {
    3. await webView.InvokeScriptAsync("select_body", null);
    5. DataPackage p = await webView.CaptureSelectedContentToDataPackageAsync();
    7. string rtf = await p.GetView().GetRtfAsync();
    9. richEditBox.Document.SetText(Windows.UI.Text.TextSetOptions.FormatRtf, rtf);
    10. }
webview