怎样增加一个XML节点！

[homey123]

<books>
<book genre="novel" publicationdate="1997">
<title>Pride And Prejudice</title>
<first-name>Jane</first-name>
<last-name>Austen</last-name></author>
<price>24.95</price>
</book>
</books>

现在想增加一个书的节点
<book genre="书名" publicationdate="日期">
<title>Pride And Prejudice</title>
<first-name>Jane</first-name>
<last-name>Austen</last-name></author>
<price>32.12</price>
</book>

[saucer]

两种方法:

using System;
using System.Xml;

string sFileName = "book.xml";
XmlDocument myDocument = new XmlDocument();
myDocument.Load(sFileName);

//方法1
XmlNode node= myDocument.DocumentElement.SelectSingleNode("book");
XmlNode node2 = node.CloneNode(true);
node2["price"].InnerText = "32.12";
node2.Attributes["genre"].Value = "书名";
node2.Attributes["publicationdate"].Value = "日期";
myDocument.DocumentElement.AppendChild(node2);

//方法2

XmlElement book = myDocument.CreateElement("book");
XmlAttribute genre = myDocument.CreateAttribute("genre");
genre.Value = "书名";
book.Attributes.Append(genre);
XmlAttribute publicationdate = myDocument.CreateAttribute("publicationdate");
publicationdate.Value = "日期";
book.Attributes.Append(publicationdate);

XmlElement title = myDocument.CreateElement("title");
title.InnerText = "Pride And Prejudice";
book.AppendChild(title);

XmlElement author = myDocument.CreateElement("author");

XmlElement firstname = myDocument.CreateElement("first-name");
firstname.InnerText = "Jane";
author.AppendChild(firstname);

XmlElement lastname = myDocument.CreateElement("last-name");
lastname.InnerText = "Austen";
author.AppendChild(lastname);

book.AppendChild(author);

XmlElement price = myDocument.CreateElement("price");
price.InnerText = "32.12";

book.AppendChild(price);
myDocument.DocumentElement.AppendChild(book);

myDocument.Save(sFileName);

[echevil]

DataSet ds = new DataSet();
ds.ReadXml("fileName");
ds.Tables["books"].Rows.Add(new object[]{
"书名","日期",
"Pride and Prejudice",
"Jane",
"Austen",
32.12});
ds.WriteXml("fileName");

[huan_jinwu]

try
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(filepath);
XmlElement newebook = xmldoc.CreateElement("book");
newbook.SetAttribute("genre","书名");
newbook.SetAttribute("publicationdate","日期");
XmlElement newement = xmldoc.CreateElement("title");
newement.InnerText = "Pride And Prejudice";
newbook.AppendChild(newement);
newement = xmldoc.CreateElement("first-name");
newement.InnerText = "Jane";
newbook.AppendChild(newement);

newement = xmldoc.CreateElement("last-name");
newement.InnerText = "last-name" ;
newbook.AppendChild(newement);

newement = xmldoc.CreateElement("price");
newement.InnerText = "32.12";
newbook.AppendChild(newement);

xmldoc.DocumentElement.AppendChild(newbook);
XmlTextWriter myWriter = new XmlTextWriter(filepath,System.Text.Encoding.GetEncoding("gb2312"));
myWriter.Formatting = Formatting.Indented;
xmldoc.WriteContentTo(myWriter);
myWriter.Close();
}