questions/47119999/constructor-of-a-xmlserializer-serializing-a-listt-throws-an-invalidoperatione

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.Xml;
using System.IO;
using System.Diagnostics;
using System.Collections.ObjectModel;
using System.Threading;
using System.ComponentModel;
using System.Xml.Linq;
using System.Reflection;
using System.Data;
using System.Xml.Schema;
using System.Text.RegularExpressions;
using System.Net;
using System.Xml.XPath;
using System.Globalization;
using System.ComponentModel.DataAnnotations;
using System.Collections;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;

using xmls = System.Xml.Serialization;

    // https://stackoverflow.com/questions/47119999/constructor-of-a-xmlserializer-serializing-a-listt-throws-an-invalidoperatione


    [XmlRoot(ElementName = "TextureParameter")]
    public class TextureParameter
    {
        [XmlAttribute(AttributeName = "pname")]
        public string Pname { get; set; }
        [XmlAttribute(AttributeName = "value")]
        public string Value { get; set; }
    }

    //[XmlArray("texparams")] -- uncomment and compilation will fail
    //[XmlArrayItem("texparam")]  -- uncomment and compilation will fail
    public class TextureParameterList : List<TextureParameter>
    {
    }

    class TestClass
    {
        public static void Test()
        {
            var list = new List<TextureParameter>
            {
                new TextureParameter { Pname = "TextureMinFilter", Value = "9729" },
                new TextureParameter { Pname = "TextureMagFilter", Value = "9728" },
            };
            var serializer = MakeListSerializer<TextureParameter>("texparams", "texparam");

            var xml = list.GetXml(serializer, true);

            Console.WriteLine("Result of serializing {0} with the custom {1}:", list, serializer);
            Console.WriteLine(xml);
        }

        static XmlSerializer MakeListSerializer<T>(string rootName, string elementName)
        {
            xmls.XmlAttributeOverrides attributeOverrides = new xmls.XmlAttributeOverrides();
            attributeOverrides.Add(typeof(List<T>), new xmls.XmlAttributes()
            {
                XmlRoot = new xmls.XmlRootAttribute(rootName),
            });
            attributeOverrides.Add(typeof(T), new xmls.XmlAttributes()
            {
                XmlType = new xmls.XmlTypeAttribute(elementName),
            });

            return new XmlSerializer(typeof(List<T>), attributeOverrides);
        }
    }
    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 static class XmlSerializationHelper
    {
        public static T LoadFromXml<T>(this string xmlString, XmlSerializer serial = null)
        {
            serial = serial ?? new XmlSerializer(typeof(T));
            T returnValue = default(T);
            using (StringReader reader = new StringReader(xmlString))
            {
                object result = serial.Deserialize(reader);
                if (result is T)
                {
                    returnValue = (T)result;
                }
            }
            return returnValue;
        }

        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 Program
	{
		public static void Main()
		{
			Console.WriteLine("Environment version: " + Environment.Version);
			Console.WriteLine();

			TestClass.Test();
		}
	}