C#读写XML文件

**************************** phone.xml ****************************

<?xml version="1.0" encoding="utf-8" ?>
<PhoneBook>
<phone id="001">
<Name>加菲尔德</Name>
<Number>5555555</Number>
<City>纽约</City>
<DateOfBirth>26/10/1978</DateOfBirth>
</phone>
<phone id="002">
<Name>迈克</Name>
<Number>6666666</Number>
<City>纽约</City>
<DateOfBirth>12/02/1978</DateOfBirth>
</phone>
</PhoneBook>

*********************************************************************

·使用Document读取及写入XML方法

private void xmlfun()
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("phone.xml"));

XmlElement node = doc.CreateElement("phone");
XmlAttribute atr = doc.CreateAttribute("id");
atr.InnerText = "003";
node.Attributes.Append(atr);

XmlNode xnode = (XmlNode)doc.CreateElement("Name");
xnode.InnerText="testName";
node.AppendChild(xnode);

xnode = (XmlNode)doc.CreateElement("Number");
xnode.InnerText="119";
node.AppendChild(xnode);
xnode = (XmlNode)doc.CreateElement("City");
xnode.InnerText="cs";
node.AppendChild(xnode);
xnode = (XmlNode)doc.CreateElement("DateOfBirth");
xnode.InnerText="12/02/1978";
node.AppendChild(xnode);
doc.DocumentElement.InsertAfter(node,doc.DocumentElement.LastChild);

doc.Save(Server.MapPath("phone1.xml")); //必须要存为不同的文件

}

·使用XmlTextWriter写入XML方法

private void xmlwriter()
{
XmlTextWriter writer= new XmlTextWriter(Server.MapPath("phone4.xml"),null);
writer.Formatting = Formatting.Indented; //缩进格式
writer.Indentation =4;

writer.WriteStartDocument();

writer.WriteStartElement("Person");

writer.WriteStartAttribute("ID",null);
writer.WriteString("004");
writer.WriteEndAttribute();

writer.WriteStartElement("Name");
writer.WriteString("testWriterName");
writer.WriteEndElement();

writer.WriteStartElement("Number");
writer.WriteString("88888");
writer.WriteEndElement();

writer.WriteStartElement("City");
writer.WriteString("testWriterCity");
writer.WriteEndElement();

writer.Flush();
writer.Close();

}

·使用XmlTextReader读取XML方法

private void xmlread()
{
XmlTextReader reader = new XmlTextReader(Server.MapPath("phone.xml"));
while(reader.Read())
{
if(reader.LocalName.Equals("Name") || reader.LocalName.Equals("Number"))
{
this.Label1.Text += reader.ReadString()+"/t";
}

·作用SqlCommand.ExecuteXmlReader()取得XML

SqlConnecting conn = new SqlConnection(CONNSTR);
SqlCommand cmd = new SqlCommand("select fname from employee for xml auto",conn);
conn.open();
XmlReader reader = cmd.ExecuteXmlReader();
......
################ 所取xml数据格式 #################

<employee fname="aria"/>
<employee fname="carlors"/>......