How to quickly parse XML documents through C (in fact, other languages also have corresponding interfaces or libraries to call)

The book follows ： Study XML DOM– analysis XML file

C# Access and operation in XML file

1.[ In the memory XML Data processing | Microsoft Docs]

[ Failed to transfer the external chain picture , The origin station may have anti-theft chain mechanism , It is suggested to save the pictures and upload them directly (img-s3fZSqkd-1638093309086)(E:\015.2MarkDown note \image-20211125202907963.png)]

2.[XmlDocument class (System.Xml) | Microsoft Docs]

public class XmlDocument : System.Xml.XmlNode

• This page is mainly about XmlDocument Methods 、 attribute 、 Details of the event , We can use it as needed

3. Several commonly used methods and properties

attribute / Method	Function description
Attributes	Get one XmlAttributeCollection, It contains the characteristics of this node .
DocumentElement	obtain XML The root of the document XmlElement.
FirstChild	Get the first child of the node .
ChildNodes	Get all the child nodes of the node .
LastChild	Get the last child of the node .
Name	Get the qualified name of the node .
LocalName	Get the local name of the node .
AppendChild(XmlNode)	Add the specified node to the end of the node's child list .
Clone()	Create a copy of this node .
CloneNode(Boolean)	Create a copy of this node .
CreateElement(String)	Create an element with the specified name .
CreateNode(String, String, String)	Create a node with the specified type 、Name and NamespaceURI Of XmlNode.
CreateTextNode(String)	Creates a with the specified text XmlText.
CreateXmlDeclaration(Str, Str, Str)	Create a with the specified value XmlDeclaration node .
Equals(Object)	Determines whether the specified object is equal to the current object .( Inherited from Object)
GetElementsByTagName(String)	Return to one XmlNodeList, It contains and specifies Name Columns of all child elements that match
Load(Stream)	Load from the specified stream XML file .
Load(String)	From the specified URL load XML file .
RemoveAll()	Remove all child nodes of the current node and / Or attributes .
RemoveChild(XmlNode)	Remove the specified child node .
Save(String)	take XML Save the document to the specified file , If the file exists , Then this method will overwrite it