One XML file is known 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 Attributes</p>
<p>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.INNERTEXT = "58.3"; XE1.Appendchild (Xesub3);</p>
<p>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 attribute is "Update Li Zan Hong"</p>
<p>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 you find {xe2.innerText =" Amazheng "; // modify break; // can be used to find out.}} Break;}}</p>
<p>XMLDoc.save ("BookStore.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;</p>
<p>Foreach (XMLNode XN IN XNL) {XMLELEMENT XE = (XMLELEMENT) XN;</p>
<p>IF (Xe.GetaTribute ("genre") == "fantasy") {xe.removeattribute ("genre"); // Delete the genre attribute} else if (Xe.GetaTRibute ("genre") == "Update Li Zan Hong") {xe.removeall (); // Delete all the contents of the node}} 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>
<p>XMLNode XN = Xmldoc.selectsinglenode ("BookStore");</p>
<p>XMLnodelist XNL = xn.childnodes;</p>
<p>Foreach (XMLNode XNF in XNL) {xmlelement XE = (XMLELEMENT) XNF; Console.WriteLine (Xe.GetaTribute ("genre")); // Displays the property value console.writeline ("ISBN"));</p>
<p>XMLNodelist XNF1 = XE.ChildNodes; Foreach (XMLNode XN2 in Xnf1) {Console.Writeline (xn2.innertext); // Display sub-node text}} other: use system; using system.io; using system.web; using Summary description of system.text; using system.collections; namespace shopWeb.class {/// <summary> /// logG. /// </ summary> public class Log {private XmlDocument xmlLog = new XmlDocument (); private HttpContext context = HttpContext.Current; private string xmlPath = ""; /// <summary> /// /// Constructor < / summary> /// <param name = "xmlpath"> </ param> public log (string xmlpath) {xmlpath = xmlpath; xmllog.load (context.server.mAppath (xmlpath));} /// <summary> /// Add a node, the node consists of sub-node /// </ summary> /// <param name = "htchilds"> </ param> /// <param name = "parentname"> </ param> / // <returns> </ returns> public bool addnodebychild (havehtable htchilds, string parentname) {try {</p>
<p>XmlNode Parent = xmlLog.CreateElement (ParentName); XmlNode Child; IDictionaryEnumerator myEnumerator = HTChilds.GetEnumerator (); while (myEnumerator.MoveNext ()) {Child = xmlLog.CreateElement (myEnumerator.Key.ToString ()); Child.InnerText = Myenumerator.Value.toString (); parent.appendchild (child); xmllog.documentelement.Appendchild (Parent);</p>
<p>} XMLLog.save (Context.Server.mAppath (XMLPath)); Return True;} catch {return false;</p>
<p>}</p>
<p>} /// <summary> /// Add a node This node is composed of attribute /// </ summary> /// <param name = "htattributes> </ param> /// <param name =" nodename " > </ param> /// <returns> </ returns> public bool AddNodeByAttribute (Hashtable htAttributes, string NodeName) {try {XmlNode AddNode = xmlLog.CreateElement (NodeName); IDictionaryEnumerator myEnumerator = htAttributes.GetEnumerator (); XmlAttribute atr; while (myEnumerator.MoveNext ()) {atr = xmlLog.CreateAttribute (myEnumerator.Key.ToString ()); atr.InnerText = myEnumerator.Value.ToString (); AddNode.Attributes.Append (atr); xmlLog.DocumentElement.AppendChild (Addnode); xmllog.save (Context.Server.mAppath (XMLPath)); Return True;} catch {return false</p>
<p>}</p>
<p>} /// <summary> // / or specify the number of query nodes /// </ summary> /// <param name = "querypath"> </ param> /// <returns> </ returns > Public int cellcount (string querypath) {try {xmlnode resultnodes = xmllog.selectsinglenode (querypath); returnratenodes.childNodes.count;</p>
<p>} CatCh {return -1;</p>
<p>}}} /// <summary> /// Remove the node of the specified path //////////////////////////// <RETURNS> </ param> /// <returns> </ returns> public bool DelelteNode (string QueryPath) {try {XmlNodeList ResultNodes = xmlLog.SelectNodes (QueryPath); for (int i = 0; i <ResultNodes.Count; i ) {XmlNode ParentNode = ResultNodes [i] .ParentNode; ParentNode.RemoveChild (ResultNodes [ I]);</p>
<p>XMLLog.Save (Context.Server.mAppath (XMLPath)); Return True;</p>
<p>} Catch {return false;}} /// <summary> /// query node /// </ summary> /// <param name = "querypath"> </ param> /// <Returns> </ returns > Public xmlnodelist queryNode (string querypath) {try {xmlnodelist resultnodes = xmllog.selectnodes (querypath); return results;} catCh}}}}}}}}</p></div><div class="text-center mt-3 text-grey">
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