在C#中操作XML .

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--&gt1 xml version="1.0" encoding="gb2312"?> 
2  <bookstore> 
3   <book genre="fantasy" ISBN="2-3631-4"> 
4     <title>Oberon's Legacytitle> 
5     <author>Corets, Evaauthor> 
6     <price>5.95price> 
7   book> 
8  bookstore>

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--&gt 1  XmlDocument xmlDoc=new XmlDocument();
 2    xmlDoc.Load("bookstore.xml");
 3    XmlNode root=xmlDoc.SelectSingleNode("bookstore");//查詢
 4     XmlElement xe1=xmlDoc.CreateElement("book");//建立一個節點
 5     xe1.SetAttribute("genre","李贊紅");//設定該節點genre屬性
 6     xe1.SetAttribute("ISBN","2-3631-4");//設定該節點ISBN屬性
 7     XmlElement xesub1=xmlDoc.CreateElement("title");
 8    xesub1.InnerText="CS從入門到精通";//設定文字節點
 9     xe1.AppendChild(xesub1);//新增到節點中
10     XmlElement xesub2=xmlDoc.CreateElement("author");
11    xesub2.InnerText="候捷";
12    xe1.AppendChild(xesub2);
13    XmlElement xesub3=xmlDoc.CreateElement("price");
14    xesub3.InnerText="58.3";
15    xe1.AppendChild(xesub3);
16    root.AppendChild(xe1);//新增到節點中
17     xmlDoc.Save("bookstore.xml");

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--&gt 1 xml version="1.0" encoding="gb2312"?> 
 2  <bookstore> 
 3   <book genre="fantasy" ISBN="2-3631-4"> 
 4     <title>Oberon's Legacytitle> 
 5     <author>Corets, Evaauthor> 
 6     <price>5.95price> 
 7   book> 
 8   <book genre="李贊紅" ISBN="2-3631-4"> 
 9     <title>CS從入門到精通title> 
10     <author>候捷author> 
11     <price>58.3price> 
12   book> 
13  bookstore>

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--&gt 1 //獲取bookstore節點的所有子節點 
 2  XmlNodeList nodeList=xmlDoc.SelectSingleNode("bookstore").ChildNodes;
 3    foreach(XmlNode xn in nodeList)//遍歷所有子節點 
 4     { 
 5     XmlElement xe=(XmlElement)xn;//將子節點型別轉換為XmlElement型別 
 6      if(xe.GetAttribute("genre")=="李贊紅")//如果genre屬性值為“李贊紅” 
 7      { 
 8      xe.SetAttribute("genre","update李贊紅");//則修改該屬性為“update李贊紅” 
 9       XmlNodeList nls=xe.ChildNodes;//繼續獲取xe子節點的所有子節點 
10       foreach(XmlNode xn1 in nls)//遍歷 
11       { 
12       XmlElement xe2=(XmlElement)xn1;//轉換型別 
13        if(xe2.Name=="author")//如果找到 
14        { 
15        xe2.InnerText="亞勝";//則修改 
16         break;//找到退出來就可以了 
17        } 
18      } 
19      break; 
20     } 
21    } 
22    xmlDoc.Save("bookstore.xml");//儲存。

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--&gt 1 xml version="1.0" encoding="gb2312"?> 
 2  <bookstore> 
 3   <book genre="fantasy" ISBN="2-3631-4"> 
 4     <title>Oberon's Legacytitle> 
 5     <author>Corets, Evaauthor> 
 6     <price>5.95price> 
 7   book> 
 8   <book genre="update李贊紅" ISBN="2-3631-4"> 
 9     <title>CS從入門到精通title> 
10     <author>亞勝author> 
11     <price>58.3price> 
12   book> 
13  bookstore>

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--&gt 1 XmlNodeList xnl=xmlDoc.SelectSingleNode("bookstore").ChildNodes; 
 2    foreach(XmlNode xn in xnl) 
 3    { 
 4     XmlElement xe=(XmlElement)xn;
 5  if(xe.GetAttribute("genre")=="fantasy") 
 6     { 
 7      xe.RemoveAttribute("genre");//刪除genre屬性 
 8      } 
 9     else if(xe.GetAttribute("genre")=="update李贊紅") 
10     { 
11      xe.RemoveAll();//刪除該節點的全部內容 
12      } 
13    } 
14    xmlDoc.Save("bookstore.xml"); 

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--&gt 1 xml version="1.0" encoding="gb2312"?> 
 2  <bookstore> 
 3   <book ISBN="2-3631-4"> 
 4     <title>Oberon's Legacytitle> 
 5     <author>Corets, Evaauthor> 
 6     <price>5.95price> 
 7   book> 
 8   <book> 
 9   book> 
10  bookstore>

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--&gt 1 XmlNode xn=xmlDoc.SelectSingleNode("bookstore"); 
 2    XmlNodeList xnl=xn.ChildNodes; 
 3    foreach(XmlNode xnf in xnl) 
 4    { 
 5     XmlElement xe=(XmlElement)xnf; 
 6     Console.WriteLine(xe.GetAttribute("genre"));//顯示屬性值 
 7      Console.WriteLine(xe.GetAttribute("ISBN")); 
 8     XmlNodeList xnf1=xe.ChildNodes; 
 9     foreach(XmlNode xn2 in xnf1) 
10     { 
11      Console.WriteLine(xn2.InnerText);//顯示子節點點文字 
12      } 
13    }