using System;

using System.Collections.Generic;

using System.Text;

using System.Linq;

using System.Xml.Serialization;

using System.Xml;

using System.Xml.Schema;

using System.Xml.Linq;

using System.IO;

using System.Data;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO.Compression;

​

using NUnit.Framework; //NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/53527040/ixmlserializable-readxml-implementation?noredirect=1#comment94103552_53527040

​

    public class ItemProperty : IXmlSerializable

    {

        public static ItemProperty Empty { get; } = new ItemProperty();

​

        public ItemProperty()

        {

            this.Name = string.Empty;

            this.Value = string.Empty;

            this.Id = 0;

            this.Order = 0;

        }

​

        public string Name { get; set; }

​

        [XmlText] // no effect while using IXmlSerializable

        public string Value { get; set; }

​

        [XmlAttribute("id")] // no effect while using IXmlSerializable

        public int Id { get; set; }

​

        [XmlAttribute("itemOrder")] // no effect while using IXmlSerializable

        public int Order { get; set; }

​

        public XmlSchema GetSchema()

        {

            return null;

        }

​

        public void ReadXml(XmlReader reader)

        {

            reader.MoveToContent();

            this.Name = reader.LocalName; // Do not include the prefix (if present) in the Name.

            if (reader.HasAttributes)

            {

                var id = reader.GetAttribute("id");

                if (id != null)

                    // Since id is missing from some elements you might want to make it nullable

                    this.Id = XmlConvert.ToInt32(id);

​

                var order = reader.GetAttribute("itemOrder");

                if (order != null)

                    // Since itemOrder is missing from some elements you might want to make it nullable

                    this.Order = XmlConvert.ToInt32(order);

​

                string sequence = reader.GetAttribute("seq");

                //There is no Sequence property?

                //this.Sequence = Convert.ToInt32(sequence);

            }

​

            // Read element value.

            // This method reads the start tag, the contents of the element, and moves the reader past the end element tag.

            // thus there is no need for an additional Read()

            this.Value = reader.ReadElementContentAsString();

        }

​

        public void WriteXml(XmlWriter writer)

        {

            throw new NotImplementedException();

        }

    }

​

    [Serializable]

    public class ItemBase

    {

        [XmlElement("Value")]

        public virtual ItemProperty ItemNumber { get; set; } = ItemProperty.Empty;

​

        [XmlElement("Category")] // FIXED renamed to Category

        public virtual ItemProperty Category { get; set; } = ItemProperty.Empty;

​

        [XmlElement("EmptyElement")] // ADDED for testing purposes

        public virtual ItemProperty EmptyElement { get; set; } = ItemProperty.Empty;

​

        [XmlElement("NonEmptyElement")] // ADDED for testing purposes

        public virtual ItemProperty NonEmptyElement { get; set; } = ItemProperty.Empty;

​

        //...  like 100 other properties

    }

​

    [Serializable]

    [XmlRoot("Data")]

    public class ItemData

    {

        [XmlAttribute("totalExecutionTime")]

        public string ExecutionTime { get; set; }

​

        [XmlElement("ItemNumber", Type = typeof(ItemBase))]

        public List<ItemBase> Items { get; set; }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            var xml = GetXml();

            Console.WriteLine("Input XML: ");

            Console.WriteLine(XElement.Parse(xml));

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

            data.Dump();

            Assert.IsTrue(data.Items.Count == 1);

            Assert.IsTrue(data.Items[0].ItemNumber.Name == "Value");

            Assert.IsTrue(data.Items[0].Category.Name == "Category");

            Assert.IsTrue(data.Items[0].EmptyElement.Name == "EmptyElement");

            Assert.IsTrue(data.Items[0].NonEmptyElement.Name == "NonEmptyElement");

        }

        static string GetXml()

        {

            var xml = @"<Data totalExecutionTime=""00:00:00.0467241"">

    <ItemNumber id=""1234"" order=""0"" createdDate=""2017-03-24T12:07:09.07"" modifiedDate=""2018-08-29T16:59:19.127"">

        <!-- Comment --><Value modifiedDate=""2017-03-24T12:07:12.77"">ABC1234</Value>

        <NonEmptyElement id=""3"" parentID=""9876"" itemOrder=""3"" modifiedDate=""2017-03-24T12:16:23.687"">AA<![CDATA[ <&&> some cdata <&&> ]]>BB</NonEmptyElement>

        <EmptyElement id=""2"" parentID=""9876"" itemOrder=""2"" modifiedDate=""2017-03-24T12:16:23.687"" />

        <Category id=""5432"" parentID=""9876"" itemOrder=""1"" modifiedDate=""2017-03-24T12:16:23.687"">The best category</Category>

        ... <!-- like 100 other elements -->

    </ItemNumber>

</Data>";

            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 static string GetOuterXml(this XmlNode node, bool indent = true)

        {

            if (node == null)

                return null;

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings

                {

                    Indent = indent,

                    OmitXmlDeclaration = true,

                };

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                {

                    node.WriteTo(xmlWriter);

                }

                return textWriter.ToString();

            }

        }

    }

    public static class XmlAssert

    {

        // https://weblogs.asp.net/marianor/easy-way-to-compare-two-xmls-for-equality

        // https://stackoverflow.com/questions/7318157/best-way-to-compare-xelement-objects

        // Adapted from the answer https://stackoverflow.com/a/14463137 by https://stackoverflow.com/users/1102100/robjohnson

        public static void AreEqual(

            XElement expected,

            XElement actual)

        {

            Assert.IsTrue(XNode.DeepEquals(Normalize(expected), Normalize(actual)));

        }

​

        private static XElement Normalize(XElement element)

        {

            if (element.HasElements)

            {

                return new XElement(

                    element.Name,

                    element.Attributes()

                           .OrderBy(a => a.Name.ToString()),

                    element.Elements()

                           .OrderBy(a => a.Name.ToString())

                           .Select(e => Normalize(e)));

​

            }

​

            if (element.IsEmpty)

            {

                return new XElement(

                    element.Name,

                    element.Attributes()

                           .OrderBy(a => a.Name.ToString()));

            }

​

            return new XElement(element.Name, element.Attributes()

                .OrderBy(a => a.Name.ToString()), element.Value);

        }

    }

    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;

            }

        }

    }

​