如何创建带有节点前缀的 xml 文档,例如:
<sphinx:docset>
<sphinx:schema>
<sphinx:field name="subject"/>
<sphinx:field name="content"/>
<sphinx:attr name="published" type="timestamp"/>
</sphinx:schema>
当我尝试运行类似
new XElement("sphinx:docset")
的东西时,我遇到了异常
未处理的异常:System.Xml.XmlException:“:”字符,十六进制值 ue 0x3A,不能包含在名称中。
在 System.Xml.XmlConvert.VerifyNCName(字符串名称,ExceptionType 异常Typ e)
在 System.Xml.Linq.XName..ctor(XNamespace ns, String localName)
在 System.Xml.Linq.XNamespace.GetName(String localName)
在 System.Xml.Linq.XName.Get(字符串扩展名称)
使用 LINQ to XML 非常简单:
XNamespace ns = "sphinx";
XElement element = new XElement(ns + "docset");
或者使“别名”正常工作,使其看起来像您的示例,如下所示:
XNamespace ns = "http://url/for/sphinx";
XElement element = new XElement("container",
new XAttribute(XNamespace.Xmlns + "sphinx", ns),
new XElement(ns + "docset",
new XElement(ns + "schema"),
new XElement(ns + "field", new XAttribute("name", "subject")),
new XElement(ns + "field", new XAttribute("name", "content")),
new XElement(ns + "attr",
new XAttribute("name", "published"),
new XAttribute("type", "timestamp"))));
产生:
<container xmlns:sphinx="http://url/for/sphinx">
<sphinx:docset>
<sphinx:schema />
<sphinx:field name="subject" />
<sphinx:field name="content" />
<sphinx:attr name="published" type="timestamp" />
</sphinx:docset>
</container>
您可以读取文档的命名空间并在如下查询中使用它:
XDocument xml = XDocument.Load(address);
XNamespace ns = xml.Root.Name.Namespace;
foreach (XElement el in xml.Descendants(ns + "whateverYourElementNameIs"))
//do stuff
逐步使用 LINQ to XML:
XNamespace ns = "http://url/for/sphinx";
XAttribute sphinx = new XAttribute(XNamespace.Xmlns + "sphinx", ns);
XElement docset = new XElement(ns + "docset", sphinx);
XElement schema = new XElement(ns + "schema");
docset.Add(schema);
XElement field1 = new XElement(ns + "field", new XAttribute("name", "subject"));
XElement field2 = new XElement(ns + "field", new XAttribute("name", "content"));
XElement attr = new XElement(ns + "attr",
new XAttribute("name", "published"),
new XAttribute("type", "timestamp"));
schema.Add(field1, field2, attr);
Console.WriteLine(docset);
输出:
<sphinx:docset xmlns:sphinx="http://url/for/sphinx">
<sphinx:schema>
<sphinx:field name="subject" />
<sphinx:field name="content" />
<sphinx:attr name="published" type="timestamp" />
</sphinx:schema>
</sphinx:docset>