Question

如何在进行序列化时更改从基类继承的字段的XML元素名称？

例如，我有下一个基类：

public class One
{
    public int OneField;
}

序列化代码：

static void Main()
{
    One test = new One { OneField = 1 };
    var serializer = new XmlSerializer(typeof (One));
    TextWriter writer = new StreamWriter("Output.xml");
    serializer.Serialize(writer, test);
    writer.Close();
}

我得到了我需要的东西：

<?xml version="1.0" encoding="utf-8"?>
<One xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <OneField>1</OneField>
</One>

现在我创建了一个继承自A的新类，并为其添加了字段和自定义XML元素名称：

public class Two : One
{
    [XmlElement("SecondField")]
    public int TwoField;
}

序列化代码：

static void Main()
{
    Two test = new Two { OneField = 1, TwoField = 2 };

    var serializer = new XmlSerializer(typeof (Two));
    TextWriter writer = new StreamWriter("Output.xml");
    serializer.Serialize(writer, test);
    writer.Close();
}

结果我得到下一个输出：

<?xml version="1.0" encoding="utf-8"?>
<Two xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <OneField>1</OneField>
  <SecondField>2</SecondField>
</Two>

问题是我想将此输出中的OneField更改为FirstField而不触及基类代码（因为我也会使用它，名称必须是原始的）。我怎么能做到这一点？

谢谢。

Answer 1

试试这个：

public class Two : One
{
    private static XmlAttributeOverrides xmlOverrides;
    public static XmlAttributeOverrides XmlOverrides
    {
        get
        {
            if (xmlOverrides == null)
            {
                xmlOverrides = new XmlAttributeOverrides();
                var attr = new XmlAttributes();
                attr.XmlElements.Add(new XmlElementAttribute("FirstField"));
                xmlOverrides.Add(typeof(One), "OneField", attr);
            }
            return xmlOverrides;
        }
    }

    [XmlElement("SecondField")]
    public string TwoField;

}

你的序列化程序初始化更容易：

 var xmls = new System.Xml.Serialization.XmlSerializer(typeof(Two), Two.XmlOverrides);

Answer 2

以下是一种解决方法：覆盖子类中的字段，并使用您需要的任何名称标记overriden字段。例如，

class One
{
    public int OneField { get; set; }
}

class Two : One
{
    [XmlElement("FirstField")]
    public new int OneField
    {
       get { return base.OneField; }
       set { base.OneField = value; }
    }
}

序列化中基类字段的自定义XML元素名称

2 个答案: