XPath data type
XPath can be divided into four types of data:
Node Set (node-set)
A node set is a set of nodes that match the criteria returned by a path. Other types of data cannot be converted to node sets.
Boolean Value (Boolean)
A conditional
Use XPath to read Xml files The purpose of introducing XPath is to find a node element accurately when matching the XML document structure tree. You can compare XPath to a file management path: through the file management path, you can find the
XPath Introduction
XPath is a W3C standard. It is designed to locate nodes in the xml1.0 or xml1.1 document node tree. Currently, xpath1.0 and xpath2.0 are available. Xpath1.0 became the W3C standard in 1999, while xpath2.0 standard was established
Htmlagilitypackage is used in recent development, so keep a record of XPath-related knowledge! Introduction to XPathXPath is a language that looks for information in an XML document. XPath can be used to traverse elements and attributes in an XML
First, select the nodeCommon Road-strength Expressions:
An expression
Describe
Instance
NodeName
Select all child nodes of the NodeName node
XPath ('//div ')
All child nodes of a div node
First, select the nodeCommon Road-strength Expressions:
An expression
Describe
Instance
NodeName
Select all child nodes of the NodeName node
XPath ('//div ')
All child nodes of a div node
Java EE XML XPath@author IxenosXPath Technology 1 introducedProblem: When using dom4j query to compare deep hierarchies of nodes (tags, attributes, text), compare the trouble!!! You need to traverse the many nodes of the DOM tree to find it!such as
In c #, we often search for and traverse nodes. we can use the XPath syntax. The XPath syntax is simple, but powerful enough. XPath can quickly locate nodes or attributes in Xml, it is also the basic knowledge of using xslt.
Reprinted :#
In c #, we
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