//定义XMLDocument
            XmlDocument xmlDocument = new XmlDocument();
            
//定义XML文档头文件

            XmlDeclaration xmlDeclaration = xmlDocument.CreateXmlDeclaration("1.0","utf-8",null);
            
//增加XML文档头

            xmlDocument.AppendChild(xmlDeclaration);
            
//定义XML的根

            XmlElement xmlRoot = xmlDocument.CreateElement("userdata");
            
//添加根的属性

            xmlRoot.SetAttribute("createuser","true");
            
//修改根属性的值

            xmlRoot.GetAttributeNode("createuser").Value = "false";
            
//添加子节点并设置子节点属性

            xmlDocument.AppendChild(xmlRoot);
            XmlElement dataconnection 
= xmlDocument.CreateElement("dataconnection"
);
            XmlElement server 
= xmlDocument.CreateElement("server"
);
            server.InnerText 
= "localhost"
;
            XmlElement uid 
= xmlDocument.CreateElement("uid"
);
            uid.InnerText 
= "sa"
;
            XmlElement pwd 
= xmlDocument.CreateElement("pwd"
);
            xmlRoot.AppendChild(dataconnection);
            dataconnection.AppendChild(server);
            dataconnection.AppendChild(uid);
            dataconnection.AppendChild(pwd);
            
//保存XML文档

            xmlDocument.Save("book.xml");
            
//读取子节点server的值

            XmlNode xnserver = xmlDocument.SelectSingleNode("userdata/dataconnection/server");
            Console.WriteLine(
"node server's value is "+
 xnserver.InnerText);
            Console.ReadLine();

生成的XML代码如下:

 


<?xml version="1.0" encoding="utf-8"?>
<userdata createuser="false">
  
<dataConnection>
    
<server>localhost</server>
    
<uid>sa</uid>
    
<pwd />
  
</dataConnection>
</userdata>

 

 

代码
这是以前自己做过的一个测试。楼主可以参考一下。

=======================bookstore.XML内容====================
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
  
<book>
  
</book>
  
<book>
  
</book>
  
<book genre="李赞红" ISBN="2-3631-4">
    
<title>CS从入门到精通</title>
    
<author>候捷</author>
    
<price>58.3</price>
  
</book>
  
<book genre="李赞红" ISBN="2-3631-4">
    
<title>CS从入门到精通</title>
    
<author>候捷</author>
    
<price>58.3</price>
  
</book>
</bookstore>

=======================读取========================
            XmlDocument doc 
= new XmlDocument();
            doc.Load(
@"d:\bookstore.xml");
            XmlElement root 
= doc.DocumentElement;


            MessageBox.Show(root.SelectNodes(
"book")[0].InnerText);

=======================添加=========================
            XmlDocument xmlDoc 
= new XmlDocument();
            xmlDoc.Load(
@"d:\bookstore.xml");
            XmlNode root 
= xmlDoc.SelectSingleNode("bookstore");//查找<bookstore>
            XmlElement xe1 = xmlDoc.CreateElement("book");//创建一个<book>节点
            xe1.SetAttribute("genre""李赞红");//设置该节点的genre属性
            xe1.SetAttribute("ISBN""2-3631-4");//设置该节点的ISBN属性

            XmlElement xesub1 
= xmlDoc.CreateElement("title");//添加一个名字为title的子节点
            xesub1.InnerText = "CS从入门到精通";//设置文本
            xe1.AppendChild(xesub1);//把title添加到<book>节点中

            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);
//把book添加到<bookstore>根节点中
            xmlDoc.Save(@"d:\bookstore.xml");

======================修改========================
            XmlDocument xmlDoc 
= new XmlDocument();
            xmlDoc.Load(
@"d:\bookstore.xml");
            XmlNodeList nodeList 
= xmlDoc.SelectSingleNode("bookstore").ChildNodes;//获取bookstore节点的所有子节点
            foreach (XmlNode xn in nodeList)//遍历所有名字为bookstore的子节点
            {
                XmlElement xe 
= (XmlElement)xn;//将子节点类型转换为XmlElement类型
                if (xe.GetAttribute("genre"== "李赞红")//如果genre属性值为“李赞红”
                {
                    xe.SetAttribute(
"genre""update李赞红");//则修改该属性为“update李赞红”

                    XmlNodeList nls 
= xe.ChildNodes;//继续获取xe(xn)子节点的所有子节点
                    foreach (XmlNode xn1 in nls)//遍历
                    {
                        XmlElement xe2 
= (XmlElement)xn1;//转换类型
                        if (xe2.Name == "author")//如果找到
                        {
                            xe2.InnerText 
= "亚胜";//则修改
                            break;//找到退出来
                        }
                    }
                    
break;
                }
            }
            xmlDoc.Save(
@"d:\bookstore.xml");//保存。

========================删除=========================

            XmlDocument xmlDoc 
= new XmlDocument();
            xmlDoc.Load(
@"d:\bookstore.xml");
            XmlNodeList xnl 
= xmlDoc.SelectSingleNode("bookstore").ChildNodes;

            
foreach (XmlNode xn in xnl)
            {
                XmlElement xe 
= (XmlElement)xn;


                
if (xe.GetAttribute("genre"== "fantasy")
                {
                    xe.RemoveAttribute(
"genre");//删除genre属性
                }
                
else if (xe.GetAttribute("genre"== "update李赞红")
                {
                    xe.RemoveAll();
//删除该节点的全部内容
                }
            }
            xmlDoc.Save(
@"d:\bookstore.xml"); 

 


 

posted on 2009-05-30 22:04  钱途无梁  阅读(1000)  评论(0编辑  收藏  举报