I am using a very stupid method, but can help beginners understand the process of accessing the XML node.
One XML file is known (bookstore.xml) is as follows:
Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> </ bookstore></p>
<p>1. Insert a <book> node into the <BookStore> node:</p>
<p>XmlDocument xmlDoc = new XmlDocument (); xmlDoc.Load ( "bookstore.xml"); XmlNode root = xmlDoc.SelectSingleNode ( "bookstore"); // Find <bookstore> XmlElement xe1 = xmlDoc.CreateElement ( "book"); / / Create a <book> node Xe1.setttribute ("Genre", "Li Zanhong"); // Set the Node Genre Attribute Xe1.Setattribute ("ISBN", "2-3631-4"); // Set the node ISBN Attribute Xmlelement Xesub1 = XMLDoc.createElement ("Title"); Xesub1.innerText = "CS From Getting Started to Wen"; // Settings Text Node Xe1.AppendChild (Xesub1); // Add to <Book> Node XMLELEment XESUB2 = XMLDOC .CreateElement ("author"); Xesub2.innerText = "Waiting"; Xe1.Appendchild (Xesub2); XMlelement Xesub3 = XmLDoc.createElement ("Price"); XESUB3.NNERTEXT = "58.3"; Xe1.Appendchild (Xesub3) Root.Appendchild (xe1); // Add to <BookStore> Node XMLDoc.save ("BookStore.xml");</p>
<p>/ / ================ result is:</p>
<p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book genre = "fantasy" ISBN = "2-3631-4"> <title> Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> <book genre = "李赞红" ISBN = "2-3631-4"> <title> CS from getting started to master </ title> <author> 捷</ author> <price> 58.3 </ price> </ book> </ bookstore> 2, modify the node: Change the GENRE value of the GENRE attribute value "Le Li Zanhong" to "Update Li Zanli", the child of the node The text of the node <author> is modified to "Ya Sheng".</p>
<p>XmlNodelist NodeList = XmLDoc.selectsinglenode ("BookStore"). ChildNodes; // Get all child nodes for the BookStore node Foreach (XMLNode Xn In nodelist) // Traverse all child nodes {xmlelement XE = (xmlelement) xn; // Fander node Type Convert to XMLELEMENT Type IF (Xe.GetaTRibute ("Genre") == "Li Zanhong") // If the GENRE attribute value is "Li Zanhong" {xe.setttribute ("genre", "Update Li Zan Hong"); // Modify This property is "Update Li Zanli" XMLNodeList NLS = Xe.childNodes; / / Continue all child nodes of the XE child node Foreach (XMLNode XN1 IN NLS) // Traversed {XMLELEMENT XE2 = (XMLELEMENT) XN1; // Conversion Type IF ( XE2.NAME == "Author") // If {xe2.innertext = "Assembly"; // modify break; // can be used to find out.}} Break;}} xmldoc.save. XML "); // Save.</p>
<p>/ / =================</p>
<p>The last result is:</p>
<p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book genre = "fantasy" ISBN = "2-3631-4"> <title> Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> <book genre = "Update Li Zanli" ISBN = "2-3631-4"> <title> CS from getting started </ title> <author> Sheng </ author> <price> 58.3 </ price> </ book> </ bookstore> 3, delete <book genre = "fantasy" ISBN = "2-3631-4"> Node GENRE attribute, delete <book genre = "Update Li Zanli" ISBN = "2-3631-4"> node.</p>
<p>XMLNodeList XNL = XmLDoc.selectsinglenode ("BookStore"). ChildNodes; Foreach (XMLNode XN IN XL) {XMLELEMENT XE = (XMLElement) xn;</p>
<p>IF (Xe.GetaTribute ("genre") == "fantasy")</p>
<p>{</p>
<p>Xe.Removettribute ("genre"); // Delete GENRE attribute</p>
<p>}</p>
<p>Else IF (Xe.GetaTRibute ("genre") == "Update Li Zanli")</p>
<p>{</p>
<p>Xe.removeAll (); // Delete the entire content of the node</p>
<p>}</p>
<p>}</p>
<p>XMLDoc.save ("BookStore.xml");</p>
<p>/ / =====================</p>
<p>The last result is:</p>
<p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book isbn = "2-3631-4"> <title> Oberon's legacy </ title> <author> corets, evA </ author> < Price> 5.95 </ price> </ book> <book> </ book> </ bookstore></p>
<p>4, display all data.</p></div><div class="text-center mt-3 text-grey">
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