Я знаю, что это старый вопрос, но я столкнулся с той же проблемой, и ни одно из решений, похоже, не отвечает на вопрос ОП. Итак, вот мое решение (комментарии на французском, если вам интересно):
#region Références
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
#endregion
namespace XmlSerializationTests
{
/// <summary>
/// Représente une liste qui peut être sérialisée en XML en tant que noeud racine.
/// </summary>
/// <typeparam name="T">Type des éléments de la liste.</typeparam>
public class XmlSerializableList<T>
: List<T>, IXmlSerializable
{
#region Variables
private static readonly XmlSerializer _ItemSerializer = new XmlSerializer(typeof(T));
private static readonly string _ItemName;
private string _RootName;
#endregion
#region Méthodes
/// <summary>
/// Initialisation statique
/// </summary>
static XmlSerializableList()
{
_ItemName = (typeof(T).GetCustomAttributes(typeof(XmlRootAttribute), true).FirstOrDefault() as XmlRootAttribute)?.ElementName ?? typeof(T).Name;
}
/// <summary>
/// Obtient le nom racine.
/// </summary>
protected virtual string RootName
{
get
{
if (string.IsNullOrWhiteSpace(_RootName)) _RootName = (GetType().GetCustomAttributes(typeof(XmlRootAttribute), true).FirstOrDefault() as XmlRootAttribute)?.ElementName ?? GetType().Name;
return _RootName;
}
}
/// <summary>
/// Obtient le nom des éléments.
/// </summary>
protected virtual string ItemName
{
get { return _ItemName; }
}
/// <summary>
/// Cette méthode est réservée et ne doit pas être utilisée.Lorsque vous implémentez l'interface IXmlSerializable, vous devez retourner la valeur null (Nothing dans Visual Basic) à partir cette méthode et, si la spécification d'un schéma personnalisé est requise, appliquez à la place <see cref="T:System.Xml.Serialization.XmlSchemaProviderAttribute"/> à la classe.
/// </summary>
/// <returns> <see cref="T:System.Xml.Schema.XmlSchema"/> qui décrit la représentation XML de l'objet qui est généré par la méthode <see cref="M:System.Xml.Serialization.IXmlSerializable.WriteXml(System.Xml.XmlWriter)"/> et utilisé par la méthode <see cref="M:System.Xml.Serialization.IXmlSerializable.ReadXml(System.Xml.XmlReader)"/>.</returns>
public XmlSchema GetSchema()
{
return null;
}
/// <summary>
/// Génère un objet à partir de sa représentation XML.
/// </summary>
/// <param name="reader"><see cref="T:System.Xml.XmlReader"/> source à partir de laquelle l'objet est désérialisé.</param>
public void ReadXml(XmlReader reader)
{
if (!reader.IsEmptyElement)
{
reader.ReadStartElement();
while (reader.NodeType != XmlNodeType.EndElement)
{
T item = (T) _ItemSerializer.Deserialize(reader);
Add(item);
}
reader.ReadEndElement();
}
else reader.ReadStartElement();
}
/// <summary>
/// Convertit un objet en sa représentation XML.
/// </summary>
/// <param name="writer"><see cref="T:System.Xml.XmlWriter"/> flux dans lequel l'objet est sérialisé.</param>
public void WriteXml(XmlWriter writer)
{
foreach (var i in this)
{
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add("", "");
_ItemSerializer.Serialize(writer, i, ns);
}
}
#endregion
}
}
А вот класс юнит-теста для демонстрации использования и результатов:
#region Références
using System.IO;
using System.Text;
using System.Xml.Serialization;
using Microsoft.VisualStudio.TestTools.UnitTesting;
#endregion
namespace XmlSerializationTests
{
[TestClass]
public class XmlSerializableListTests
{
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public int Birth { get; set; }
}
[XmlRoot("color")]
public class ColorDefinition
{
[XmlElement("name")] public string Name { get; set; }
[XmlElement("r")] public int Red { get; set; }
[XmlElement("g")] public int Green { get; set; }
[XmlElement("b")] public int Blue { get; set; }
}
public class Persons : XmlSerializableList<Person>
{
}
[XmlRoot("colors")]
public class ColorList : XmlSerializableList<ColorDefinition>
{
}
private T ReadXml<T>(string text) where T : class
{
XmlSerializer serializer = new XmlSerializer(typeof (T));
using (StringReader sr = new StringReader(text))
{
return serializer.Deserialize(sr) as T;
}
}
private string WriteXml<T>(T data) where T : class
{
XmlSerializer serializer = new XmlSerializer(typeof(T));
StringBuilder sb = new StringBuilder();
using (StringWriter sw = new StringWriter(sb))
{
serializer.Serialize(sw, data);
return sb.ToString();
}
}
[TestMethod]
public void ReadEmpty()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfInt32>
</XmlSerializableListOfInt32>";
XmlSerializableList<int> lst = ReadXml<XmlSerializableList<int>>(xml);
Assert.AreEqual(0, lst.Count);
}
[TestMethod]
public void ReadEmpty2()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfInt32 />";
XmlSerializableList<int> lst = ReadXml<XmlSerializableList<int>>(xml);
Assert.AreEqual(0, lst.Count);
}
[TestMethod]
public void ReadSimpleItems()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfInt32>
<int>0</int>
<int>52</int>
<int>79</int>
</XmlSerializableListOfInt32>";
XmlSerializableList<int> lst = ReadXml<XmlSerializableList<int>>(xml);
Assert.AreEqual(3, lst.Count);
Assert.AreEqual(0, lst[0]);
Assert.AreEqual(52, lst[1]);
Assert.AreEqual(79, lst[2]);
}
[TestMethod]
public void ReadComplexItems()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfPerson>
<Person>
<FirstName>Linus</FirstName>
<LastName>Torvalds</LastName>
<Birth>1969</Birth>
</Person>
<Person>
<FirstName>Bill</FirstName>
<LastName>Gates</LastName>
<Birth>1955</Birth>
</Person>
<Person>
<FirstName>Steve</FirstName>
<LastName>Jobs</LastName>
<Birth>1955</Birth>
</Person>
</XmlSerializableListOfPerson>";
XmlSerializableList<Person> lst = ReadXml<XmlSerializableList<Person>>(xml);
Assert.AreEqual(3, lst.Count);
Assert.AreEqual("Linus", lst[0].FirstName);
Assert.AreEqual("Torvalds", lst[0].LastName);
Assert.AreEqual(1969, lst[0].Birth);
Assert.AreEqual("Bill", lst[1].FirstName);
Assert.AreEqual("Gates", lst[1].LastName);
Assert.AreEqual(1955, lst[1].Birth);
Assert.AreEqual("Steve", lst[2].FirstName);
Assert.AreEqual("Jobs", lst[2].LastName);
Assert.AreEqual(1955, lst[2].Birth);
}
[TestMethod]
public void ReadInheritedPersons()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<Persons>
<Person>
<FirstName>Linus</FirstName>
<LastName>Torvalds</LastName>
<Birth>1969</Birth>
</Person>
<Person>
<FirstName>Bill</FirstName>
<LastName>Gates</LastName>
<Birth>1955</Birth>
</Person>
<Person>
<FirstName>Steve</FirstName>
<LastName>Jobs</LastName>
<Birth>1955</Birth>
</Person>
</Persons>";
Persons lst = ReadXml<Persons>(xml);
Assert.AreEqual(3, lst.Count);
Assert.AreEqual("Linus", lst[0].FirstName);
Assert.AreEqual("Torvalds", lst[0].LastName);
Assert.AreEqual(1969, lst[0].Birth);
Assert.AreEqual("Bill", lst[1].FirstName);
Assert.AreEqual("Gates", lst[1].LastName);
Assert.AreEqual(1955, lst[1].Birth);
Assert.AreEqual("Steve", lst[2].FirstName);
Assert.AreEqual("Jobs", lst[2].LastName);
Assert.AreEqual(1955, lst[2].Birth);
}
[TestMethod]
public void ReadInheritedColors()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<colors>
<color>
<name>red</name>
<r>255</r>
<g>0</g>
<b>0</b>
</color>
<color>
<name>green</name>
<r>0</r>
<g>255</g>
<b>0</b>
</color>
<color>
<name>yellow</name>
<r>255</r>
<g>255</g>
<b>0</b>
</color>
</colors>";
ColorList lst = ReadXml<ColorList>(xml);
Assert.AreEqual(3, lst.Count);
Assert.AreEqual("red", lst[0].Name);
Assert.AreEqual(255, lst[0].Red);
Assert.AreEqual(0, lst[0].Green);
Assert.AreEqual(0, lst[0].Blue);
Assert.AreEqual("green", lst[1].Name);
Assert.AreEqual(0, lst[1].Red);
Assert.AreEqual(255, lst[1].Green);
Assert.AreEqual(0, lst[1].Blue);
Assert.AreEqual("yellow", lst[2].Name);
Assert.AreEqual(255, lst[2].Red);
Assert.AreEqual(255, lst[2].Green);
Assert.AreEqual(0, lst[2].Blue);
}
[TestMethod]
public void WriteEmpty()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfInt32 />";
XmlSerializableList<int> lst = new XmlSerializableList<int>();
string result = WriteXml(lst);
Assert.AreEqual(xml, result);
}
[TestMethod]
public void WriteSimpleItems()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfInt32>
<int>0</int>
<int>52</int>
<int>79</int>
</XmlSerializableListOfInt32>";
XmlSerializableList<int> lst = new XmlSerializableList<int>() {0, 52, 79};
string result = WriteXml(lst);
Assert.AreEqual(xml, result);
}
[TestMethod]
public void WriteComplexItems()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<XmlSerializableListOfPerson>
<Person>
<FirstName>Linus</FirstName>
<LastName>Torvalds</LastName>
<Birth>1969</Birth>
</Person>
<Person>
<FirstName>Bill</FirstName>
<LastName>Gates</LastName>
<Birth>1955</Birth>
</Person>
<Person>
<FirstName>Steve</FirstName>
<LastName>Jobs</LastName>
<Birth>1955</Birth>
</Person>
</XmlSerializableListOfPerson>";
XmlSerializableList<Person> persons = new XmlSerializableList<Person>
{
new Person {FirstName = "Linus", LastName = "Torvalds", Birth = 1969},
new Person {FirstName = "Bill", LastName = "Gates", Birth = 1955},
new Person {FirstName = "Steve", LastName = "Jobs", Birth = 1955}
};
string result = WriteXml(persons);
Assert.AreEqual(xml, result);
}
[TestMethod]
public void WriteInheritedPersons()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<Persons>
<Person>
<FirstName>Linus</FirstName>
<LastName>Torvalds</LastName>
<Birth>1969</Birth>
</Person>
<Person>
<FirstName>Bill</FirstName>
<LastName>Gates</LastName>
<Birth>1955</Birth>
</Person>
<Person>
<FirstName>Steve</FirstName>
<LastName>Jobs</LastName>
<Birth>1955</Birth>
</Person>
</Persons>";
Persons lst = new Persons
{
new Person {FirstName = "Linus", LastName = "Torvalds", Birth = 1969},
new Person {FirstName = "Bill", LastName = "Gates", Birth = 1955},
new Person {FirstName = "Steve", LastName = "Jobs", Birth = 1955}
};
string result = WriteXml(lst);
Assert.AreEqual(xml, result);
}
[TestMethod]
public void WriteInheritedColors()
{
string xml = @"<?xml version=""1.0"" encoding=""utf-16""?>
<colors>
<color>
<name>red</name>
<r>255</r>
<g>0</g>
<b>0</b>
</color>
<color>
<name>green</name>
<r>0</r>
<g>255</g>
<b>0</b>
</color>
<color>
<name>yellow</name>
<r>255</r>
<g>255</g>
<b>0</b>
</color>
</colors>";
ColorList lst = new ColorList
{
new ColorDefinition { Name = "red", Red = 255, Green = 0, Blue = 0 },
new ColorDefinition { Name = "green", Red = 0, Green = 255, Blue = 0 },
new ColorDefinition { Name = "yellow", Red = 255, Green = 255, Blue = 0 }
};
string result = WriteXml(lst);
Assert.AreEqual(xml, result);
}
}
}