xml操作

 1 写xml

<?xml version="1.0" encoding="gb2312"?>  //XML的声明

<rootEle>    //根节点

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>two</ele2>

    <ele3>three</ele3>

  </Node>

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>two</ele2>

    <ele3>three</ele3>

  </Node>

</rootEle>

 1     private void WriteXml()
 2     {
 3         XmlDocument xmldoc;
 4         XmlNode xmlnode;
 5         XmlElement xmlelem;
 6 
 7         xmldoc = new XmlDocument();
 8         //加入XML的声明段落,<?xml version="1.0" encoding="gb2312"?>
 9         XmlDeclaration xmldecl;
10         xmldecl = xmldoc.CreateXmlDeclaration("1.0", "gb2312", null);
11         xmldoc.AppendChild(xmldecl);
12 
13         //加入一个根元素
14         xmlelem = xmldoc.CreateElement("", "rootEle", "");
15         xmldoc.AppendChild(xmlelem);
16         //加入另外一个元素
17         for (int i = 1; i < 3; i++)
18         {
19 
20             XmlNode root = xmldoc.SelectSingleNode("rootEle");//查找<root> 
21 
22             xmlnode = xmldoc.CreateElement("Node");//创建一个<Node>节点 
23             
24 
25             XmlElement xesub1 = xmldoc.CreateElement("ele1");
26             xesub1.SetAttribute("Attribute1", "abc");//设置该节点属性 
27             xesub1.SetAttribute("Attribute2", "123");
28             xesub1.InnerText = "one";//设置文本节点 
29             xmlnode.AppendChild(xesub1);//添加到<Node>节点中 
30             XmlElement xesub2 = xmldoc.CreateElement("ele2");
31             xesub2.InnerText = "two";
32             xmlnode.AppendChild(xesub2);
33             XmlElement xesub3 = xmldoc.CreateElement("ele3");
34             xesub3.InnerText = "three";
35             xmlnode.AppendChild(xesub3);
36 
37             root.AppendChild(xmlnode);//添加到<根>节点中 
38         }
39         //保存创建好的XML文档
40         xmldoc.Save(Server.MapPath("data.xml"));
41     }

2. 加入节点

<?xml version="1.0" encoding="gb2312"?>

<rootEle>

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>two</ele2>

    <ele3>three</ele3>

  </Node>

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>two</ele2>

    <ele3>three</ele3>

  </Node>

  <Node>

    <ele1 Attribute1="newabc" Attribute2="new123">one</ele1>

    <ele2>two</ele2>

    <ele3>three</ele3>

  </Node>

</rootEle>

 1 private void WriteXml()
 2     {
 3         XmlDocument xmldoc = new XmlDocument();
 4         xmldoc.Load(Server.MapPath("data.xml"));
 5         XmlNode root = xmldoc.SelectSingleNode("rootEle");//查找<rootEle> 
 6         
 7         XmlNode  xmlnode = xmldoc.CreateElement("Node");//创建一个<Node>节点 
 8             
 9  
10             XmlElement xesub1 = xmldoc.CreateElement("ele1");
11             xesub1.SetAttribute("Attribute1", "newabc");//设置该节点属性 
12             xesub1.SetAttribute("Attribute2", "new123");
13              xesub1.InnerText = "one";//设置文本节点 
14              xmlnode.AppendChild(xesub1);//添加到<Node>节点中 
15             XmlElement xesub2 = xmldoc.CreateElement("ele2");
16              xesub2.InnerText = "two";
17             xmlnode.AppendChild(xesub2);
18             XmlElement xesub3 = xmldoc.CreateElement("ele3");
19             xesub3.InnerText = "three";
20              xmlnode.AppendChild(xesub3);
21  
22              root.AppendChild(xmlnode);//添加到<根>节点中 
23 
24              xmldoc.Save(Server.MapPath("data.xml"));
25     }

 

3.更改节点

<?xml version="1.0" encoding="gb2312"?>

<rootEle>

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>UpdateTwo</ele2>

    <ele3>three</ele3>

  </Node>

  <Node>

    <ele1 Attribute1="abc" Attribute2="123">one</ele1>

    <ele2>UpdateTwo</ele2>

    <ele3>three</ele3>

  </Node>

  <Node>

    <ele1 Attribute1="Change" Attribute2="new123">one</ele1>

    <ele2>UpdateTwo</ele2>

    <ele3>three</ele3>

  </Node>

</rootEle> 

 

 

4.去掉 Attribute1属性  加入flag element 删除 ele2 element

<?xml version="1.0" encoding="gb2312"?>

<rootEle>

  <Node>

    <ele1 Attribute2="123">one</ele1>

    <ele3>three</ele3>

    <flag>1</flag>

  </Node>

  <Node>

    <ele1 Attribute2="123">one</ele1>

    <ele3>three</ele3>

    <flag>1</flag>

  </Node>

  <Node>

    <ele1 Attribute2="new123">one</ele1>

    <ele3>three</ele3>

    <flag>1</flag>

  </Node>

</rootEle> 

 1 private void WriteXml()
 2 {
 3     XmlDocument xmlDoc = new XmlDocument();
 4     xmlDoc.Load(Server.MapPath("data.xml"));
 5 
 6     XmlNodeList nodeList = xmlDoc.SelectSingleNode("rootEle").ChildNodes;
 7     //XmlNodeList nodeList = xmlDoc.SelectNodes("Node");
 8     XmlNodeList subnodeList;
 9     foreach (XmlNode xn in nodeList)
10     {
11         XmlElement xesub = xmlDoc.CreateElement("flag");
12         xesub.InnerText = "1";
13         xn.AppendChild(xesub); //加入一个节点
14 
15         subnodeList = xn.ChildNodes;
16         foreach (XmlNode xn2 in subnodeList)
17         {
18             XmlElement xe = (XmlElement)xn2;
19             xe.RemoveAttribute("Attribute1");//删除Attribute1属性
20 
21             if (xe.Name == "ele2")
22             {
23                 xn.RemoveChild(xe);//则删除
24             }
25 
26         }
27 
28     }
29     xmlDoc.Save(Server.MapPath("data.xml"));//保存。
30 }