<?xml:namespace prefix = o />

?

<?xml version="1.0" encoding="gb2312"?>
<bookstore>
? <book genre="fantasy" ISBN="2-3631-4">
??? <title>Oberon's Legacy</title>
??? <author>Corets, Eva</author>
??? <price>5.95</price>
? </book>
</bookstore>

?

?? XmlDocument xmlDoc=new XmlDocument();
?? xmlDoc.Load("bookstore.xml");
?? XmlNode root=xmlDoc.SelectSingleNode("bookstore");//查找<bookstore>
?? XmlElement xe1=xmlDoc.CreateElement("book");//創(chuàng)建一個<book>節(jié)點
?? xe1.SetAttribute("genre","李贊紅");//設(shè)置該節(jié)點genre屬性
?? xe1.SetAttribute("ISBN","2-3631-4");//設(shè)置該節(jié)點ISBN屬性
?
?? XmlElement xesub1=xmlDoc.CreateElement("title");
?? xesub1.InnerText="CS從入門到精通";//設(shè)置文本節(jié)點
?? xe1.AppendChild(xesub1);//添加到<book>節(jié)點中
?? XmlElement xesub2=xmlDoc.CreateElement("author");
?? xesub2.InnerText="候捷";
?? xe1.AppendChild(xesub2);
?? XmlElement xesub3=xmlDoc.CreateElement("price");
?? xesub3.InnerText="58.3";
?? xe1.AppendChild(xesub3);
?
?? root.AppendChild(xe1);//添加到<bookstore>節(jié)點中
?? xmlDoc.Save("bookstore.xml");

?

<?xml version="1.0" encoding="gb2312"?>
<bookstore>
? <book genre="fantasy" ISBN="2-3631-4">
??? <title>Oberon's Legacy</title>
??? <author>Corets, Eva</author>
??? <price>5.95</price>
? </book>
? <book genre="李贊紅" ISBN="2-3631-4">
??? <title>CS從入門到精通</title>
??? <author>候捷</author>
??? <price>58.3</price>
? </book>
</bookstore>

?

??? XmlNodeList nodeList=xmlDoc.SelectSingleNode("bookstore").ChildNodes;//獲取bookstore節(jié)點的所有子節(jié)點
?? foreach(XmlNode xn in nodeList)//遍歷所有子節(jié)點
?? {
??? XmlElement xe=(XmlElement)xn;//將子節(jié)點類型轉(zhuǎn)換為XmlElement類型
??? if(xe.GetAttribute("genre")=="李贊紅")//如果genre屬性值為“李贊紅”
??? {
???? xe.SetAttribute("genre","update李贊紅");//則修改該屬性為“update李贊紅”
?
???? XmlNodeList nls=xe.ChildNodes;//繼續(xù)獲取xe子節(jié)點的所有子節(jié)點
???? foreach(XmlNode xn<?xml:namespace prefix = st1 />1 innls)//遍歷
???? {
????? XmlElement xe2=(XmlElement)xn1;//轉(zhuǎn)換類型
????? if(xe2.Name=="author")//如果找到
????? {
?????? xe2.InnerText="亞勝";//則修改
?????? break;//找到退出來就可以了
????? }
???? }
???? break;
??? }
?? }
?
?? xmlDoc.Save("bookstore.xml");//保存。

?

<?xml version="1.0" encoding="gb2312"?>
<bookstore>
? <book genre="fantasy" ISBN="2-3631-4">
??? <title>Oberon's Legacy</title>
??? <author>Corets, Eva</author>
??? <price>5.95</price>
? </book>
? <book genre="update李贊紅" ISBN="2-3631-4">
??? <title>CS從入門到精通</title>
??? <author>亞勝</author>
??? <price>58.3</price>
? </book>
</bookstore>

?

XmlNodeList xnl=xmlDoc.SelectSingleNode("bookstore").ChildNodes;
?
?? foreach(XmlNode xn in xnl)
?? {
??? XmlElement xe=(XmlElement)xn;

?

??? if(xe.GetAttribute("genre")=="fantasy")
??? {
???? xe.RemoveAttribute("genre");//刪除genre屬性
??? }
??? else if(xe.GetAttribute("genre")=="update李贊紅")
??? {
???? xe.RemoveAll();//刪除該節(jié)點的全部內(nèi)容
??? }
?? }
?? xmlDoc.Save("bookstore.xml");

?

<?xml version="1.0" encoding="gb2312"?>
<bookstore>
? <book ISBN="2-3631-4">
??? <title>Oberon's Legacy</title>
??? <author>Corets, Eva</author>
??? <price>5.95</price>
? </book>
? <book>
? </book>
</bookstore>

?

?XmlNode xn=xmlDoc.SelectSingleNode("bookstore");
?
?? XmlNodeList xnl=xn.ChildNodes;
??
?? foreach(XmlNode xnf in xnl)
?? {
??? XmlElement xe=(XmlElement)xnf;
??? Console.WriteLine(xe.GetAttribute("genre"));//顯示屬性值
??? Console.WriteLine(xe.GetAttribute("ISBN"));
?
??? XmlNodeList xnf1=xe.ChildNodes;
??? foreach(XmlNode xn2 in xnf1)
??? {
???? Console.WriteLine(xn2.InnerText);//顯示子節(jié)點點文本
??? }
?? }