如何通过XPath检索CDATA标记中的元素文本?

/Obj/Name/text() 是返回CDATA标记内容的XPath。

让我失望的是Value属性的行为。对于XMLNode(DOM世界),XMLNode。元素的值属性(使用CDATA或其他方式)返回Null。InnerText属性将为您提供CDATA/Text内容。

string sXml = @"
<object>
    <name><![CDATA[SomeText]]></name>
    <name>OtherName</name>
</object>";

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml( sXml );
XmlNamespaceManager nsMgr = new XmlNamespaceManager(xmlDoc.NameTable);

Console.WriteLine(@"XPath = /object/name" );
WriteNodesToConsole(xmlDoc.SelectNodes("/object/name", nsMgr));

Console.WriteLine(@"XPath = /object/name/text()" );
WriteNodesToConsole( xmlDoc.SelectNodes("/object/name/text()", nsMgr) );

Console.WriteLine(@"Xml.Linq = obRoot.Elements(""name"")");
XElement obRoot = XElement.Parse( sXml );
WriteNodesToConsole( obRoot.Elements("name") );

输出:

XPath = /object/name
        NodeType = Element
        Value = <null>
        OuterXml = <name><![CDATA[SomeText]]></name>
        InnerXml = <![CDATA[SomeText]]>
        InnerText = SomeText

        NodeType = Element
        Value = <null>
        OuterXml = <name>OtherName</name>
        InnerXml = OtherName
        InnerText = OtherName

XPath = /object/name/text()
        NodeType = CDATA
        Value = SomeText
        OuterXml = <![CDATA[SomeText]]>
        InnerXml =
        InnerText = SomeText

        NodeType = Text
        Value = OtherName
        OuterXml = OtherName
        InnerXml =
        InnerText = OtherName

Xml.Linq = obRoot.Elements("name")
        Value = SomeText
        Value = OtherName

MainForm.cs

private void Xml2Tree( TreeNode tNode, XmlNode xNode)
{
   ...
   case XmlNodeType.CDATA:
      //MessageBox.Show("TODO: XmlNodeType.CDATA");
      // Gishu                    
      TreeNode cdataNode = new TreeNode("![CDATA[" + xNode.Value + "]]");
      cdataNode.ForeColor = Color.Blue;
      cdataNode.NodeFont = new Font("Tahoma", 12);
      tNode.Nodes.Add(cdataNode);
      //Gishu
      break;

CDATA部分只是 XPath 被称为a text node 或在 the XML Infoset 作为“字符信息项块”。

其他工具,如 the XPath Visualizer Name 计算此XPath表达式时的元素:

/*/Name/text()

还可以编写一个简单的XSLT转换 :

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="text"/>
<xsl:template match="/">
  "<xsl:value-of select="/*/Name"/>"
</xsl:template>
</xsl:stylesheet>

:

<Obj>
    <Name><![CDATA[SomeText]]></Name>
</Obj>

产生正确的结果:

  "SomeText"

我认为您引用的线程表明,XPATH忽略了CDATA标记本身,而不是CDATA标记中包含的文本。

看看这是否有帮助- http://www.zrinity.com/xml/xpath/

/Obj/Name/text()