对使用的适当装饰器或可能需要的任何设计感到困惑.序列化实现IXmlSerializable的类是否有办法在XmlRoot元素中包含命名空间及其前缀?
例如,类定义.
- using System;
- using System.Xml;
- using System.Xml.Schema;
- using System.Xml.Serialization;
- [XmlRoot("Classy",Namespace = XML_NS)]
- public class TestClass : IXmlSerializable
- {
- private const string XML_PREFIX = ""; // default namespace
- private const string XML_NS = "www.123.com";
- private const string XML_MEMBER_PREFIX = "me";
- private const string XML_MEMBER_NS = "member.com";
- [XmlNamespaceDeclarations]
- public XmlSerializerNamespaces xmlsn {
- get {
- XmlSerializerNamespaces xsn = new XmlSerializerNamespaces();
- xsn.Add(XML_PREFIX,XML_NS);
- xsn.Add(XML_MEMBER_PREFIX,XML_MEMBER_NS);
- return xsn;
- }
- }
- void IXmlSerializable.WriteXml(XmlWriter writer) {
- writer.WriteElementString(XML_MEMBER_PREFIX,"Member1.5",XML_MEMBER_NS,Member1);
- writer.WriteElementString(XML_MEMBER_PREFIX,"Member2.5",Member2.ToString());
- writer.WriteElementString(XML_PREFIX,"Member3.5",XML_NS,Member3);
- }
- //[XmlElement(ElementName = "Member1.5",Namespace = XML_MEMBER_NS)]
- public string Member1 {
- get { return "init"; }
- set { ; }
- }
- //[XmlElement(ElementName = "Member2.5",Namespace = XML_MEMBER_NS)]
- public int Member2 {
- get { return 3; }
- set { ; }
- }
- //[XmlElement(ElementName = "Member3.5",Namespace = XML_NS)]
- public string Member3 {
- get { return "default namespace"; }
- set { ; }
- }
- // ignore ReadXml/GetSchema
- XmlSchema IXmlSerializable.GetSchema() { return null; }
- void IXmlSerializable.ReadXml(XmlReader reader) { return; }
- }
通过以下序列化时:
- TestClass tc = new TestClass();
- XmlSerializer ser = new XmlSerializer(typeof(TestClass));
- ser(writer,tc,tc.xmlsn); // just a plain XmlWriter to Console.Out
输出是
- <?xml version="1.0" encoding="utf-8"?>
- <Classy xmlns="www.123.com">
- <me:Member1.5 xmlns:me="member.com">init</me:Member1.5>
- <me:Member2.5 xmlns:me="member.com">3</me:Member2.5>
- <Member3.5>default namespace</Member3.5>
- </Classy>
我期待的输出是:
- <?xml version="1.0" encoding="utf-8"?>
- <Classy xmlns:me="member.com" xmlns="www.123.com">
- <me:Member1.5>init</me:Member1.5>
- <me:Member2.5>3</me:Member2.5>
- <Member3.5>default namespace</Member3.5>
- </Classy>
第二个是XmlSerializer的输出,如果删除了类的IXmlSerializable实现并取消注释XmlElement装饰器.我知道返回的两个Xml文档都是有效的,但尝试删除冗余的命名空间声明会很好.我认为这样的事情是可能的,因为IXmlSerializable旨在更好地控制类的序列化/反序列化方式.
更新:一个非常有趣的答案建议修改XmlWriterSettings!看起来这会通过修改NamespaceHandling属性来清除所有内容.但是,这仍然会导致为每个成员重写名称空间.完整的序列化代码如下:
- XmlSerializer ser = new XmlSerializer(typeof(TestClass));
- TestClass tc = new TestClass();
- XmlWriterSettings xmlSet = new XmlWriterSettings();
- xmlSet.Encoding = System.Text.Encoding.UTF8;
- xmlSet.Indent = true;
- xmlSet.NamespaceHandling = NamespaceHandling.OmitDuplicates;
- XmlWriter writer = XmlWriter.Create(Console.Out,xmlSet);
- ser.Serialize(writer,tc); // with/without tc.xmlsn same result
- writer.Flush();
- writer.Close();