c# - 如何在 C# 中创建具有多个命名空间属性的 XML

Question

例如，我如何在 C# 中生成这个 XML

<?xml version='1.0'?>
<oneshot xmlns='http://www.w3.org/2002/xforms' xmlns:dm='http://mobileforms.foo.com/xforms' xmlns:h='http://www.w3.org/1999/xhtml' xmlns:xsd='http://www.w3.org/2001/XMLSchema'>
  <dm:form_namespace>Foo</dm:form_namespace>
  <Days>6</Days>
  <Leave_Type>Option 3</Leave_Type>
</oneshot>

我特别纠结于 xmlns:dm 声明。有什么想法吗？

Answer 1

您最好的选择(阅读:最少的黑客攻击)可能是自定义 IXmlSerializable 实现；您可以部分通过 XmlRootAttribute、XmlElementAttribute 等的组合获得您想要的内容，如下所示:

[Serializable]
[XmlRoot("oneshot")]
public class OneShot 
{
    [XmlElement("form_namespace", Namespace="http://mobileforms.foo.com/xforms")]
    public string FormNamespace {get; set;}
    [XmlElement("Days")]
    public int Days {get; set;}
    [XmlElement("Leave_Type")]
    public string LeaveType {get; set;}

这将生成如下内容:

<?xml version="1.0" encoding="utf-16"?>
<oneshot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <form_namespace xmlns="http://mobileforms.foo.com/xforms">Foo</form_namespace>
  <Days>6</Days>
  <Leave_Type>Option 3</Leave_Type>
</oneshot>

但是如果你实现了IXmlSerializable，你就拥有了完全的控制权:

public class OneShot : IXmlSerializable
{
    public string FormNamespace {get; set;}
    public int Days {get; set;}
    public string LeaveType {get; set;}

    #region IXmlSerializable
    public void WriteXml (XmlWriter writer)
    {
        writer.WriteStartElement("oneshot");
        writer.WriteAttributeString("xmlns", null, "http://www.w3.org/2002/xforms");
        writer.WriteAttributeString("xmlns:dm", null, "http://mobileforms.foo.com/xforms");
        writer.WriteAttributeString("xmlns:h", null, "http://www.w3.org/1999/xhtml");
        writer.WriteAttributeString("xmlns:xsd", null, "http://www.w3.org/2001/XMLSchema");
        writer.WriteElementString("dm:form_namespace", null, FormNamespace);
        writer.WriteElementString("Days", Days.ToString());
        writer.WriteElementString("Leave_Type", LeaveType);
        writer.WriteEndElement();
    }

    public void ReadXml (XmlReader reader)
    {
        // populate from xml blob
    }

    public XmlSchema GetSchema()
    {
        return(null);
    }
    #endregion
}

这给了你:

<?xml version="1.0" encoding="utf-16"?>
<OneShot>
  <oneshot xmlns="http://www.w3.org/2002/xforms" xmlns:dm="http://mobileforms.foo.com/xforms" xmlns:h="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <dm:form_namespace>Foo</dm:form_namespace>
    <Days>6</Days>
    <Leave_Type>Option 3</Leave_Type>
  </oneshot>
</OneShot>