c# - 如何使用 XmlSerializer 在不同级别指定 XmlElement？

Question

我有一个类，我想将其序列化为 xml。我想将生成的 xml(元素中的元素)中的一个属性下移一个级别，而不更改类的结构。是否可以使用 XmlSerializer 来执行此操作？

一个例子:

生成的xml:

<Person>
    <firstname xmlns=\"http://myschema.com\">John</firstname>
    <postcode xmlns=\"http://myschema.com\">N1 0XE</postcode>
</Person>

所需的 xml:

<Person>
    <firstname xmlns=\"http://myschema.com\">John</firstname>
    <address>
        <postcode xmlns=\"http://myschema.com\">N1 0XE</postcode>
    </address>
</Person>

代码:

[Serializable]
[XmlType(Namespace = "http://myschema.com")]
public class Person
{
    [XmlElement("firstname")]
    public string FirstName { get; set; }

    [XmlElement("postcode")]
    public string Postcode { get; set; }
}

序列化器:

var xmlSerializer = new XmlSerializer(typeof(Person));
var stringWriter = new StringWriter();
var xmlWriter = XmlWriter.Create(stringWriter);

xmlSerializer.Serialize(xmlWriter, person);

Answer 1

我知道更改生成的标准输出 xml 的唯一方法是实现 IXmlSerializable 。因此，您不必更改公共(public)结构，但必须提供某些方法的实现。

public class Person : IXmlSerializable
{
    [XmlElement("firstname")]
    public string FirstName { get; set; }

    [XmlElement("postcode")]
    public string Postcode { get; set; }

    #region IXmlSerializable Member

    public System.Xml.Schema.XmlSchema GetSchema()
    {
        return null;
    }

    public void ReadXml(System.Xml.XmlReader reader)
    {
        if (reader.Read())
        {
            FirstName = reader.ReadInnerXml();
        }

        reader.Read(); 

        Postcode = reader.ReadInnerXml();
    }

    public void WriteXml(System.Xml.XmlWriter writer)
    {
        writer.WriteElementString("firstname ", FirstName);
        writer.WriteStartElement("address");
        writer.WriteElementString("postcode", Postcode);
        writer.WriteEndElement();
    }

    #endregion

    // for demo purposes only !
    public override string ToString()
    {
        return FirstName + ", " + Postcode;
    }

    // source to test the exported file and read it right after!
    Person p = new Person() { FirstName = "jon doe", Postcode = "N1 OX" };

    XmlSerializer xs = new XmlSerializer(typeof(Person));
    StreamWriter sw = new StreamWriter("export.xml");
    xs.Serialize(sw, p);
    sw.Close();

    StreamReader sr = new StreamReader("export.xml");
    Person p1 = xs.Deserialize(sr) as Person;
    Debug.WriteLine(p1.ToString());

@XmlSubElement - 只有一堆 attributes available for xmlSerialization 。不幸的是，没有没有subElement或任何类似的东西。