什么是WPF的DataFormats类中的UWP等效Xaml数据格式字段

Question

I've been trying to find out a UWP equivalent of DataFormats Class in WPF that has Xaml as a data format field - or may be there is a workaround in UWP?

As shown in the link above, the Xaml is one of the data format in WPF's DataFormats class. But so far I've not found such an equivalent in UWP. The StandardDataFormats Class in UWP does not list Xaml as one of its Data Format.

Motivation :

Similar to the WPF example shown here: TextRange.Save method , I'm trying convert the following WPF code to a UWP code. But as you can see on line range.Save(outputStream, DataFormats.Xaml); the WPF code is using Xaml as data format when saving the range selection to a memory stream:

....
var doc = new FlowDocument();
var range = new TextRange(doc.ContentStart, doc.ContentEnd);

using (var outputStream = new MemoryStream())
{
   range.Save(outputStream, DataFormats.Xaml);
   outputStream.Position = 0;
   using (var xamlStream = new StreamReader(outputStream))
   {
      var xaml = xamlStream.ReadToEnd();
      File.WriteAllText(xamlFileName, xaml);
   }
}

Answer 1

UWP's TextRange struct does not have a method named Save so your question is moot.

To my knowledge, UWP does not (easily) support manipulating XAML markup at runtime (eg there is no XamlWriter class, and there is no API for the manipulating of XAML, though Windows.UI.Xaml.Markup.XamlReader and XmlBinaryWriter are available, they don't seem intended for use by application developers, but are meant for the build process).

If you want to serialize a UWP TextRange in a way that maintains document structure I think you'll need to serialize (and deserialize) that yourself using some custom logic (though I wonder what happens if you pass your TextRange instance into JsonConvert.SerializeObject( ... ) ...).