<%@ Page Language="C#" %> <%@ Import Namespace="System.Xml" %> protected void btnSave_Click(object sender, EventArgs e) { string xmlPath = MapPath("Books.xml"); XmlDocument doc = new XmlDocument(); //Check if the file already exists or not if (System.IO.File.Exists(xmlPath)) { doc.Load(xmlPath); XmlNode bookNode = CreateBookNode(doc); //Get reference to the book node and append the book node to it XmlNode bookStoreNode = doc.SelectSingleNode("bookstore"); bookStoreNode.AppendChild(bookNode); lblResult.Text = "XML Document has been successfully updated"; } else { XmlNode declarationNode = doc.CreateXmlDeclaration("1.0", "", ""); doc.AppendChild(declarationNode); XmlNode comment = doc.CreateComment("This file represents a fragment of a book store inventory database"); doc.AppendChild(comment); XmlNode bookstoreNode = doc.CreateElement("bookstore"); XmlNode bookNode = CreateBookNode(doc); //Append the book node to the bookstore node bookstoreNode.AppendChild(bookNode); //Append the bookstore node to the document doc.AppendChild(bookstoreNode); lblResult.Text = "XML Document has been successfully created"; } doc.Save(xmlPath); } XmlNode CreateBookNode(XmlDocument doc) { XmlNode bookNode = doc.CreateElement("book"); //Add the genre attribute to the book node XmlAttribute genreAttribute = doc.CreateAttribute("genre"); genreAttribute.Value = txtGenre.Text; bookNode.Attributes.Append(genreAttribute); //Add all the children of the book node XmlNode titleNode = doc.CreateElement("title"); titleNode.InnerText = txtTitle.Text; bookNode.AppendChild(titleNode); //Create the author node and its children XmlNode authorNode = doc.CreateElement("author"); XmlNode firstNameNode = doc.CreateElement("first-name"); firstNameNode.InnerText = txtFirstName.Text; authorNode.AppendChild(firstNameNode); XmlNode lastNameNode = doc.CreateElement("last-name"); lastNameNode.InnerText = txtLastName.Text; authorNode.AppendChild(lastNameNode); bookNode.AppendChild(authorNode); XmlNode priceNode = doc.CreateElement("price"); priceNode.InnerText = txtPrice.Text; bookNode.AppendChild(priceNode); return bookNode; }