static void WriteXMLbyXmlWriter(XmlWriter writer, string symbol, double price, double change, long volume)
{
writer.WriteStartElement("Stock");
writer.WriteAttributeString("Symbol", symbol);
writer.WriteElementString("Price", XmlConvert.ToString(price));
writer.WriteElementString("Change", XmlConvert.ToString(change));
writer.WriteElementString("Volume", XmlConvert.ToString(volume));
writer.WriteEndElement();
}

protected void CreateXMLFileButton_Click(object sender, System.EventArgs e)
{
// 创建一个表示所要生成的XML文件路径的字符串。如果该路径指向NTFS分区，则需要相关的访问权限。
string filename = XMLFilePathTextBox.Text;
// 创建一个写入XML数据的文件流
System.IO.FileStream myFileStream = new System.IO.FileStream(filename, System.IO.FileMode.Create);
// 使用文件流对象创建一个XmlTextWriter对象
XmlTextWriter myXmlWriter = new XmlTextWriter(myFileStream, System.Text.Encoding.Unicode);
myXmlWriter.Formatting = Formatting.Indented;
try
{
// 使用WriteXMLbyXmlWriter方法把数据写入XmlTextWriter对象中
WriteXMLbyXmlWriter(myXmlWriter, "MSFT", 74.5, 5.5, 49020000);
// 通过Close方法的调用，XmlTextWriter对象的数据最终写入XML文件
myXmlWriter.Close();
Page.Response.Write("生成XML文档成功!");
}
catch
{
Page.Response.Write("生成XML文档失败!请检查路径是否正确，以及是否有写入权限。");
}
}
2 把一个XML文件读入内存，形成一个DOM结构，把XML读入一个ArrayList

// 创建XmlDocument类的实例
XmlDocument doc = new XmlDocument();
ArrayList NodeValues = new ArrayList();
// 把people.xml文件读入内存，形成一个DOM结构
doc.Load( Server.MapPath("people.xml") );
XmlNode root = doc.DocumentElement;
foreach( XmlNode personElement in root.ChildNodes )//root.ChildNodes获取节点的所有子节点
NodeValues.Add(personElement.FirstChild.Value);
3 使用XMLTextReader.读入ArrayList

XmlTextReader reader = new XmlTextReader( Server.MapPath("students.xml") );
ArrayList NodeValues = new ArrayList();

while( reader.Read() )
{
if( reader.NodeType == XmlNodeType.Element && reader.Name == "NAME" )
{
reader.Read();
NodeValues.Add( reader.Value );
}
}

4 使用XPath

XPathDocument xpdoc = new XPathDocument( Server.MapPath("people.xml") );
XPathNavigator nav = xpdoc.CreateNavigator();
XPathExpression expr = nav.Compile("descendant::PEOPLE/PERSON");
XPathNodeIterator iterator = nav.Select(expr);
ArrayList NodeValues = new ArrayList();

while (iterator.MoveNext())
NodeValues.Add(iterator.Current.ToString());

XMLNodeListBox.DataSource = NodeValues;
XMLNodeListBox.DataBind();
5 使用xsl展示XML中的数据

System.Xml.XmlDocument xmldoc = new System.Xml.XmlDocument();
xmldoc.Load(Server.MapPath("user.xml"));
System.Xml.Xsl.XslTransform xmltrans = new System.Xml.Xsl.XslTransform();
xmltrans.Load(Server.MapPath("user.xsl"));
Xml1.Document = xmldoc;
Xml1.Transform = xmltrans;
user.xsl:

UserName
Name
Phone
Address