Web API - Dynamic to XML serialization

Question

I am writing a Web API web service that is returning dynamically constructed property bag. Is there any working serializer or a way how to serialize dynamic to XML? I tried to look for any good suggestions but haven't found anything usable.

Answer 1

We solved it by creating a custom XML formatter.

This isn't an ideal solution but it works.

In the Global.asax

GlobalConfiguration.Configuration.Formatters.Add(new CustomXmlFormatter());
GlobalConfiguration.Configuration.Formatters
    .Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);

Create a new class called CustomXmlFormatter

using System;
using System.IO;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace EMP.WebServices.api.Formatters
{
    public class CustomXmlFormatter : MediaTypeFormatter
    {
        public CustomXmlFormatter()
        {
            SupportedMediaTypes.Add(
                new MediaTypeHeaderValue("application/xml"));
            SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/xml"));
        }

        public override bool CanReadType(Type type)
        {
            if (type == (Type)null)
                throw new ArgumentNullException("type");

            return true;
        }

        public override bool CanWriteType(Type type)
        {
            return true;
        }

        public override Task WriteToStreamAsync(Type type, object value,
            Stream writeStream, System.Net.Http.HttpContent content,
            System.Net.TransportContext transportContext)
        {
            return Task.Factory.StartNew(() =>
                {
                        var json = JsonConvert.SerializeObject(value);

                        var xml = JsonConvert
                            .DeserializeXmlNode("{\"Root\":" + json + "}", "");

                        xml.Save(writeStream);
                });
        }
    }
}