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();
