C # Operations XML file Instance Rollup

Manipulation of XML files is a very common feature in C # programming. This article shows a few common examples of C # operations XML files as an example. Specific as follows:

1. Return to the node subscript

public static XmlDocument Getdoc (String path)//load XML document {  XmlDocument doc = new XmlDocument ();  Doc. Load (path);  return doc;} <summary>///returns the found node subscript///</summary>///<param name= "path" >xml file path </param>///<param Name= "Bname" > title </param>///<returns></returns>public static int getPosition (String path,string node, String bname) {  int i;  XmlDocument doc = new XmlDocument ();  Doc. Load (path);  XmlNodeList nodeList = doc. selectSingleNode (node). ChildNodes;  for (i = 0; i < Nodelist.count; i++)  {if (Nodelist[i]. Childnodes[0]. InnerText = = bname) {   return i;}  }  return-1;}

2. Traversing data

<summary>///traversal data///</summary>///<param name= "sender" ></param>///<param name= "E" ></param>protected void Btnread_click (object sender, EventArgs e) {  XmlDocument doc = Getdoc ("books.xml") ;//load XML document, books file is stored in  foreach (XmlElement root in Doc. Documentelement.childnodes)//traverse the root of the child node  {Response.Write ("<script>document.write (' <br/> '); </ Script> "); Response.Write ("<script>document.write" + root. Name + "');</script>");//node name root. Name book foreach (XmlElement item in root. ChildNodes) {   Response.Write ("<script>document.write (') + item. Name + "' + ': ' + ' + item. InnerText + "');</script>");//Output node name and text node value   Response.Write ("<script>document.write (' <br/> ') ;</script> "); }  }}

3. Find

<summary>///Find//</summary>///<param name= "path" > File path </param>///<param name= "Node" > Node </param>///<param name= "bname" > Find keyword </param>///<returns>XmlNode</returns> public static XmlNode Find (string path,string node,string bname) {  XmlDocument doc = new XmlDocument ();  Doc. Load (path);//Load XML document  XmlNodeList NodeList = doc. selectSingleNode (node). ChildNodes;  int i = getPosition (path, node, bname);/  if (I >= 0) return nodelist[i];  else return null;}

4. Delete a node

<summary>///delete element, attribute///</summary>///<param name= "path" > File </param>///<param name= " Node > The parent node of the specified node </param>///<param name= "attribute" > delete the node when it is empty, otherwise delete the property </param>///<param name= " Bname "></param>public static void Delete (String path,string node,string attribute,string bname) {  XmlDocument doc = new XmlDocument ();  Doc. Load (path);  XmlNode root = Doc. selectSingleNode (node);  XmlNodeList nodeList = doc. selectSingleNode (node). ChildNodes;  int i = getPosition (path, node, bname);//returns the specified node subscript  if (i >= 0)  {if (attribute. Equals ("")) {   root. RemoveChild (Nodelist[i]); } else {   XmlElement xn = (XmlElement) nodelist[i];   Xn. RemoveAttribute (attribute); }  }  doc. Save (path);

5. Add

<summary>///add element value///</summary>///<param name= "path" ></param>///<param name= "Node" ></param>///<param name= "element" ></param>///<param name= "value" ></param>/// <param name= "I" > Insert subscript, if negative, default from last node insert </param>///<returns></returns>public static bool Add (String path,string node,string element,string value,int i) {  XmlDocument doc = new XmlDocument ();  Doc. Load (path);  XmlNodeList nodeList = doc. selectnodes (node);  XmlNode NewNode = doc. selectSingleNode (node). LastChild;  if (I < 0 | | i > NODELIST.COUNT-1)//If it is less than 0 or greater than the node length, the default is to add  {XmlElement newelement = doc from the last node. createelement (element);//create elements Newelement.innertext = value;//assignment Newnode.appendchild (newelement);  }  else  {XmlElement newelement = doc. createelement (Element); Newelement.innertext = value; NODELIST[I-1]. AppendChild (newelement);  }  Doc. Save (path);  return true;}

It is hoped that the method described in this article will be helpful to everyone's C # programming.

In addition to the Declaration, Running GuestArticles are original, reproduced please link to the form of the address of this article
C # Operations XML file Instance Rollup

This address: http://www.paobuke.com/develop/c-develop/pbk23627.html

Related content C # calls Python files to perform ASP. NET core MVC Permissions control: Control operation rights in view C # verification code creation and use example C # use time and then string to create a unique order number
In-depth parsing of jagged arrays and implicitly typed arrays in C # How to open and read a USB file directory example of a simple boxed operation in C # using C # to get the HTML source of a Web page

C # Operations XML file Instance Rollup