questions/50304153/xmlserializer-to-c-sharp-object-store-original-xml-element

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using System.Xml.Serialization;
using System.Xml;
using System.Xml.Linq;
using System.Xml.Schema;
using System.IO;
using System.Data;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO.Compression;

    //https://stackoverflow.com/questions/50304153/xmlserializer-to-c-sharp-object-store-original-xml-element#comment87633181_50304153


    [XmlRoot(ElementName = ElementName)]
    public class Data : IXmlSerializable
    {
        public const string ElementName = "data";

        XElement element = new XElement((XName)ElementName);

        public string Someattributea
        {
            get { return (string)element.Attribute("someattributea"); }
            set { element.SetAttribute("someattributea", value); }
        }

        public string Someattributeb
        {
            get { return (string)element.Attribute("someattributeb"); }
            set { element.SetAttribute("someattributeb", value); }
        }

        public string Someattributec
        {
            get { return (string)element.Attribute("someattributec"); }
            set { element.SetAttribute("someattributec", value); }
        }

        public string SourceXML
        {
            get
            {
                return element.ToString();
            }
            set
            {
                if (value == null)
                    throw new ArgumentNullException();
                element = XElement.Parse(value);
            }
        }

        #region IXmlSerializable Members

        public XmlSchema GetSchema() { return null; }

        public void ReadXml(XmlReader reader)
        {
            reader.MoveToContent();
            element = (XElement)XNode.ReadFrom(reader);
        }

        public void WriteXml(XmlWriter writer)
        {
            foreach (var attr in element.Attributes())
                writer.WriteAttributeString(attr.Name.LocalName, attr.Name.NamespaceName, attr.Value);
            foreach (var child in element.Elements())
                child.WriteTo(writer);
        }

        #endregion
    }

    public static class XElementExtensions
    {
        public static void SetAttribute(this XElement element, XName attributeName, string value)
        {
            var attr = element.Attribute(attributeName);
            if (value == null)
            {
                if (attr != null)
                    attr.Remove();
            }
            else
            {
                if (attr == null)
                    element.Add(new XAttribute(attributeName, value));
                else
                    attr.Value = value;
            }
        }
    }

    [XmlRoot("DataList")]
    public class DataList
    {
        [XmlElement("DataItem", Namespace = "https://Test Namespace")]
        public List<Data> Data { get; set; }
    }

    class TestClass
    {
        public static void Test()
        {
            var xml = GetXml();

            var data = xml.LoadFromXml<Data>();

            var xml2 = data.GetXml();

            Console.WriteLine(xml2);

            var data2 = xml2.LoadFromXml<Data>();

            Assert.IsTrue(data.Someattributea == data2.Someattributea && data.Someattributeb == data2.Someattributeb && data.Someattributec == data2.Someattributec);
            
            data2.Someattributea = "replacement value for Someattributea";
            data2.Someattributeb = null;

            var xml3 = data2.GetXml();

            Console.WriteLine(xml3);

            var data3 = xml3.LoadFromXml<Data>();

            Assert.IsTrue(data3.Someattributea == data2.Someattributea && data3.Someattributeb == data2.Someattributeb && data3.Someattributec == data2.Someattributec);

            Assert.IsTrue(XElement.Parse(xml3).Attributes().Select(a => a.Value).SequenceEqual(XElement.Parse(data3.GetXml()).Attributes().Select(a => a.Value)));

            TestDatalist(data);
        }

        static void TestDatalist(Data data)
        {
            Console.WriteLine("\nTesting a list of {0}.", data);

            var dataList = new DataList
            {
                Data = new List<Data>
                {
                    data.GetXml().LoadFromXml<Data>(),
                    data.GetXml().LoadFromXml<Data>(),
                },
            };


            var xml = dataList.GetXml();

            Console.WriteLine(xml);

            var dataList2 = xml.LoadFromXml<DataList>();

            var xml2 = dataList2.GetXml();

            Console.WriteLine(xml2);

            Assert.IsTrue(dataList.Data.Count == dataList2.Data.Count);
        }

        static string GetXml()
        {
            var xml = @"<data someattributea="""" someattributeb="""" someattributec="""" ExtraAttr="""" xmlns:p1=""http://SomeTestNamespace.com"" p1:someattributec=""namespace attr"" />";
            return xml;
        }
    }

    public static class XmlSerializationHelper
    {
        public static T LoadFromXml<T>(this string xmlString, XmlSerializer serial = null)
        {
            serial = serial ?? new XmlSerializer(typeof(T));
            using (var reader = new StringReader(xmlString))
            {
				return (T)serial.Deserialize(reader);
            }
        }

        public static string GetXml<T>(this T obj, bool omitStandardNamespaces)
        {
			return obj.GetXml(null, omitStandardNamespaces);
        }
		
        public static string GetXml<T>(this T obj, XmlSerializer serializer = null, bool omitStandardNamespaces = false)
        {
            XmlSerializerNamespaces ns = null;
            if (omitStandardNamespaces)
            {
                ns = new XmlSerializerNamespaces();
                ns.Add("", ""); // Disable the xmlns:xsi and xmlns:xsd lines.
            }			
            using (var textWriter = new StringWriter())
            {
                var settings = new XmlWriterSettings() { Indent = true }; // For cosmetic purposes.
                using (var xmlWriter = XmlWriter.Create(textWriter, settings))
                    (serializer ?? new XmlSerializer(obj.GetType())).Serialize(xmlWriter, obj, ns);
                return textWriter.ToString();
            }
        }
    }
				
    public class AssertionFailedException : System.Exception
    {
        public AssertionFailedException() : base() { }

        public AssertionFailedException(string s) : base(s) { }
    }

    public static class Assert
    {
        public static void IsTrue(bool value)
        {
            IsTrue(value, "failed");
        }

        public static void IsTrue(bool value, string message)
        {
            if (value == false)
                throw new AssertionFailedException(message ?? "failed");
        }
    }
						
	public class Program
	{
		public static void Main()
		{
			Console.WriteLine("Roslyn 2.0 Compiler; Environment version: " + Environment.Version);
			Console.WriteLine();

			try
			{
				TestClass.Test();
			}
			catch (Exception ex)
			{
				Console.WriteLine("Uncaught exception: ");
				Console.WriteLine(ex);
				throw;
			}
		}
	}