如何利用C＃在XML中添加节点
<?xml   version= "1.0 "   encoding= "utf-8 "?>
<root>
    <person   id= "jan "   phone= "123456 "   />
    <person   id= "pin "   phone= "452369 "   />
    <person   id= "afu "   phone= "856932 "   />
    <person   id= "zgmaike "   phone= "856321 "   />
    <age>
        <person   id= "jan "   age= "20 "   />
        <person   id= "pin "   age= "26 "   />
        <person   id= "afu "   age= "23 "   />
    </age>
</root>

如何在“ <person   id= "afu "   age= "23 "   /> ”后添加上“ <person   id= "zgmaike "   age= "25 "   /> ”这个节点？

------解决方案--------------------
http://www.pconline.com.cn/pcedu/empolder/net/0406/388296.html
------解决方案--------------------
public static void AddXmlNode(string xml,string refid,string newid,string age)
{
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(xml);
XmlNode refNode = null;
XmlNodeList xnl = xmldoc.SelectNodes( "/root/age/person ");
foreach (XmlNode node in xnl)
{
string attr = node.Attributes[ "id "].Value;
if (attr == refid)//查找节点的id是否等于你输入的id
{
refNode = node;//找到你要的节点
break;
}
}
XmlNode parent = xmldoc.SelectSingleNode( "/root/age ");
XmlElement newNode = xmldoc.CreateElement( "person ");
parent.InsertAfter(newNode,refNode);//在你所选的节点后新增节点
newNode.SetAttribute( "id ",newid);
newNode.SetAttribute( "age ",age);
xmldoc.Save(xml);
}