Example: Use js scripts to add, modify, and delete xml nodes

Bkjia.com xml documentUse js scripts to add, modify, and delete xml nodes. It is known that there is an XML file (bookstore. xml) as follows:

Reference content is as follows: <? Xml version = "1.0" encoding = "gb2312"?> <Bookstore> <Book genre = "fantasy" ISBN = "2-3631-4"> <Title> Oberons Legacy </title> <Author> Corets, Eva </author> <Price> 5.95 </price> </Book> </Bookstore>

1. Insert a <book> node to the <bookstore> node:

Reference content is as follows: XmlDocument xmlDoc = new XmlDocument (); XmlDoc. Load ("bookstore. xml "); XmlNode root = xmlDoc. SelectSingleNode ("bookstore"); // query <bookstore> XmlElement xe1 = xmlDoc. CreateElement ("book"); // create a <book> node Xe1.SetAttribute ("genre", "author"); // you can specify the genre attribute of a node. Xe1.SetAttribute ("ISBN", "2-3631-4"); // you can specify the ISBN attribute of the node. XmlElement xesub1 = xmlDoc. CreateElement ("title "); Xesub1.InnerText = "CS from entry to entry"; // set a text node Xe1.AppendChild (xesub1); // Add it to the <book> node XmlElement xesub2 = xmlDoc. CreateElement ("author "); Xesub2.InnerText = "author "; Xe1.AppendChild (xesub2 ); XmlElement xesub3 = xmlDoc. CreateElement ("price "); Xesub3.InnerText = "58.3 "; Xe1.AppendChild (xesub3 ); Root. AppendChild (xe1); // Add it to the <bookstore> node XmlDoc. Save ("bookstore. xml "); // ================================================ ==========

Result:

Reference content is as follows: <? Xml version = "1.0" encoding = "gb2312"?> <Bookstore> <Book genre = "fantasy" ISBN = "2-3631-4"> <Title> Oberons Legacy </title> <Author> Corets, Eva </author> <Price> 5.95 </price> </Book> <Book genre = "author" ISBN = "2-3631-4"> <Title> CS from entry to entry </title> <Author> author </author> <Price> 58.3 </price> </Book> </Bookstore>

2. Modify the node: Change the genre value of the node whose genre attribute value is "author" to "update author", and change the text of the child node <author> of the node to "Yasheng ".

Reference content is as follows: XmlNodeList nodeList = xmlDoc. SelectSingleNode ("bookstore"). ChildNodes; // obtain all the subnodes of the bookstore Node Foreach (XmlNode xn in nodeList) // traverses all subnodes { XmlElement xe = (XmlElement) xn; // converts the subnode type to the XmlElement type If (xe. GetAttribute ("genre") = "author") // if the genre attribute value is "author" { Xe. SetAttribute ("genre", "update Author"); // modify the attribute to "update Author" XmlNodeList nls = xe. ChildNodes; // continue to obtain all the child nodes of the xe subnode Foreach (XmlNode xn1 in nls) // traverse { XmlElement xe2 = (XmlElement) xn1; // Conversion Type If (xe2.Name = "author") // if you find { Xe2.InnerText = "Yasheng"; // modify Break; // find and exit. } } Break; } } XmlDoc. Save ("bookstore. xml"); // Save. // ================================================ ================

The final result is:

Reference content is as follows: <? Xml version = "1.0" encoding = "gb2312"?> <Bookstore> <Book genre = "fantasy" ISBN = "2-3631-4"> <Title> Oberons Legacy </title> <Author> Corets, Eva </author> <Price> 5.95 </price> </Book> <Book genre = "update Author" ISBN = "2-3631-4"> <Title> CSS from entry to entry </title> <Author> Yasheng </author> <Price> 58.3 </price> </Book> </Bookstore>