XML文档对象模型
XML文档对象模型(Document Object Model,DOM是一组以非常直观的方式访问和处理XML的类。构成DOM的类在命名空间System.Xml中。
XmlNode 表示文档中一个节点
XmlDocument表示 XML 文档。
XmlElement 表示Xml文档中一个元素。
XmlAttribute 表示一个特性
XmlText 表示开始标记和结束标记之间的文本
XmlNodeList 表示一个节点集合
XmlNodeReader
string xmlPath = @"bookstore.xml"; XmlDocument doc = new XmlDocument(); doc.Load(xmlPath); //指定要获取节点的路径 XmlNode bookNode = doc.SelectSingleNode("/bookstore/book"); XmlNodeReader reader = new XmlNodeReader(bookNode); while (reader.Read()) { //显示节点的名称和值 if (reader.NodeType == XmlNodeType.Element) { listBox1.Items.Add("Node Name:" + reader.Name); } if (reader.NodeType == XmlNodeType.Text) { listBox1.Items.Add("Node Value:" + reader.Value); } }
读取某一子节点属性：
System.Xml.XmlDocument doc = new XmlDocument(); doc.LoadXml("<Students><Student><Name>XiaoYue</Name><Age>19</Age><Sex>女</Sex></Student>" + "<Student><Name nick=\"阿柯\">TingPoen</Name><Age>23</Age><Sex>男</Sex></Student>" + "</Students>"); string nickName = doc.ChildNodes[0].ChildNodes[1].ChildNodes[0].Attributes["nick"].Value; MessageBox.Show(nickName);
读取某一节点文本：
string nickname, loginname; XmlDocument xDoc = new XmlDocument(); xDoc.Load("login_info.xml"); XmlNode xnUserInfo = xDoc.DocumentElement.SelectSingleNode("user_info"); nickname = xnUserInfo.ChildNodes[1].InnerText; loginname = xnUserInfo.ChildNodes[2].InnerText;
删除节点
View Code
XML实现用户登录
XML
<LoginList>
<user>
<Username>admin</Username>
<Password>123456</Password>
</user>
<user>
<Username>root</Username>
<Password>112233456</Password>
</user>
<user>
<Username>zht</Username>
<Password>Zht!@#</Password>
</user>
</LoginList>
View Code
string username = textBox1.Text; string userpwd = textBox2.Text; XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load("LoginList.xml"); XmlNodeList usersList = xmlDoc.SelectNodes("/LoginList/user"); bool isLogin = false; for (int i = 0; i < usersList.Count; i++) { if (username.Equals(usersList[i].SelectSingleNode("Username").InnerText) && (userpwd.Equals(usersList[i].SelectSingleNode("Password").InnerText))) { isLogin = true; break; } } if (isLogin == true) { //转到你要的界面 MessageBox.Show("登录成功"); } else { //转到错误页面 MessageBox.Show("登录失败"); }
XmlReader类 表示提供对 XML 数据进行快速、非缓存、只进访问的读取器。
http://msdn.microsoft.com/zh-cn/library/system.xml.xmlreader.aspx
View Code
XmlReader reader = XmlReader.Create(filename); while (reader.Read()) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "pa_nd": NianduStr = reader.ReadString(); break; case "pa_xz": XiuzhengStr = reader.ReadString(); break; case "pa_zf": ZhengfuStr = reader.ReadString(); cmbZhengfuTemp = transcmbZhengfuInt(ZhengfuStr); break; case "pa_jr": JiaoduStr = reader.ReadString(); break; case "pa_tan": JiaoduTanStr = reader.ReadString(); break; case "pa_zq": ZhouqiStr = reader.ReadString(); break; case "pa_per": PersentStr = reader.ReadString(); break; case "pa_jq": ModelStr = reader.ReadString(); cmbModelTemp = transcmbModelInt(ModelStr); break; case "pa_cw": ChaoweiStr = reader.ReadString(); break; case "pa_qs": QishiStr = reader.ReadString(); break; case "pa_zz": ZhongzhiStr = reader.ReadString(); break; case "pa_cf": ChengxingJiaoduStr = reader.ReadString(); break; case "pa_sb": ChengxingShoubianStr = reader.ReadString(); break; case "pa_a1": Para1Str = reader.ReadString(); break; case "pa_av1": Para1ValueStr = reader.ReadString(); break; case "pa_a2": Para2Str = reader.ReadString(); break; case "pa_av2": Para2ValueStr = reader.ReadString(); break; case "pa_a3": Para3Str = reader.ReadString(); break; case "pa_av3": Para3ValueStr = reader.ReadString(); break; case "pa_a4": Para4Str = reader.ReadString(); break; case "pa_av4": Para4ValueStr = reader.ReadString(); break; case "pa_a5": Para5Str = reader.ReadString(); break; case "pa_av5": Para5ValueStr = reader.ReadString(); break; case "pa_a6": Para6Str = reader.ReadString(); break; case "pa_av6": Para6ValueStr = reader.ReadString(); break; case "pa_a7": Para7Str = reader.ReadString(); break; case "pa_av7": Para7ValueStr = reader.ReadString(); break; case "pa_a8": Para8Str = reader.ReadString(); break; case "pa_av8": Para8ValueStr = reader.ReadString(); break; case "pa_a9": Para9Str = reader.ReadString(); break; case "pa_av9": Para9ValueStr = reader.ReadString(); break; case "pa_a10": Para10Str = reader.ReadString(); break; case "pa_av10": Para10ValueStr = reader.ReadString(); break; default: break; } } }
XmlWriter类 表示一个编写器，该编写器提供一种快速、非缓存和只进的方式来生成包含 XML 数据的流或文件。
View Code
//XmlTextWriter xmlTw = new XmlTextWriter("xmlFile.xml", System.Text.Encoding.UTF8); XmlWriter xmlTw = XmlWriter.Create("xmlFile.xml"); //添加XML的声明 xmlTw.WriteStartDocument(); //新建Book根节点 xmlTw.WriteStartElement("Book"); //根节点添加id属性 xmlTw.WriteAttributeString("id", "99"); //根节点添加title属性 xmlTw.WriteAttributeString("title", "ASP.NET电子商务网站开发全揭秘"); //生成BookInfo节点 xmlTw.WriteStartElement("BookInfo"); //BookInfo增加onwer属性 xmlTw.WriteAttributeString("onwer", "张林"); //BookInfo增加class属性 xmlTw.WriteAttributeString("class", "电子商务"); xmlTw.WriteEndElement(); xmlTw.WriteStartElement("BookAuthorInfo"); xmlTw.WriteAttributeString("Class", "Web"); xmlTw.WriteAttributeString("Author", "李伟"); xmlTw.WriteEndElement(); xmlTw.WriteEndElement(); //添加Book根节点结束标记 xmlTw.WriteEndDocument(); xmlTw.Flush(); //保存XML文档 xmlTw.Close();
View Code
System.Xml.XmlDocument doc = new XmlDocument(); XmlDeclaration xmldecl; //添加XML的声明 xmldecl = doc.CreateXmlDeclaration("1.0", "utf-8", null); System.Xml.XmlElement root = doc.DocumentElement; doc.InsertBefore(xmldecl, root); //新建Book根节点 System.Xml.XmlNode root1 = doc.CreateNode("element", "Book", ""); //根节点加到XML中去 doc.AppendChild(root1); //根节点添加id属性 XmlAttribute attrid = doc.CreateAttribute("id"); attrid.Value = "99"; root1.Attributes.SetNamedItem(attrid); //根节点添加title属性 XmlAttribute attrtitle = doc.CreateAttribute("title"); attrtitle.Value = "ASP.NET电子商务网站开发全揭秘"; root1.Attributes.SetNamedItem(attrtitle); //生成BookInfo节点 System.Xml.XmlNode BookInfo = doc.CreateNode("element", "BookInfo", ""); //BookInfo增加onwer属性 XmlAttribute attronwer = doc.CreateAttribute("onwer"); attronwer.Value = "张林"; BookInfo.Attributes.SetNamedItem(attronwer); //BookInfo增加class XmlAttribute attrclass = doc.CreateAttribute("class"); attrclass.Value = "电子商务"; BookInfo.Attributes.SetNamedItem(attrclass); //BookInfo节点加到根节点Book的子节点里 root1.AppendChild(BookInfo); System.Xml.XmlNode BookAuthorInfo = doc.CreateNode("element", "BookAuthorInfo", ""); XmlAttribute attrClass2 = doc.CreateAttribute("Class"); attrClass2.Value = "Web"; BookAuthorInfo.Attributes.SetNamedItem(attrClass2); XmlAttribute attrAuthor = doc.CreateAttribute("Author"); attrAuthor.Value = "李伟"; BookAuthorInfo.Attributes.SetNamedItem(attrAuthor); root1.AppendChild(BookAuthorInfo); //保存XML文档 doc.Save("C:\\Book.xml");
XML读入TreeView
xml
<?xml version="1.0" encoding="utf-8"?> <bookstore> <book genre="操作系统" ISBN="2-3631-1"> <title>精解Windows 7</title> <publisher>清华大学出版社</publisher> <price>49</price> </book> <book genre="数据库" ISBN="2-3631-2"> <title>SQL基础教程(第3版)</title> <publisher>人民邮电出版社</publisher> <price>69</price> </book> <book genre="影视动画" ISBN="2-3631-3"> <title>After Effects影视合成与特效火星风暴</title> <publisher>电子工业出版社</publisher> <price>98</price> </book> </bookstore>
View Code
XmlDocument xml = new XmlDocument(); xml.Load("bookstore.xml"); XmlNode xmlRoot = xml.ChildNodes[1]; //得到XML的根结点,ChildNodes[0]指向<?xml version="1.0" encoding="utf-8"?> for (int i = 0; i < xmlRoot.ChildNodes.Count; i++) { XmlNode xmlChd = xmlRoot.ChildNodes[i]; if (xmlChd is System.Xml.XmlComment) //如果当前节点是注释，跳过 continue; //添加树的根结点 TreeNode treeRoot = new TreeNode(); treeRoot.Text = xmlChd.Attributes["genre"].Value; //设置结点的显示文字 //treeRoot.Expanded = true; //设置结点的初始状态为展开 //treeRoot.SelectAction = TreeNodeSelectAction.Expand;//设置结点的点击操作为展开或收拢结点 treeView1.Nodes.Add(treeRoot); //添加当前根结点的子结点 for (int j = 0; j < xmlChd.ChildNodes.Count; j++) { XmlNode xmlLeaf = xmlChd.ChildNodes[j]; if (xmlLeaf is System.Xml.XmlComment) //如果当前节点是注释，跳过 continue; TreeNode treeLeaf = new TreeNode(); treeLeaf.Text = xmlLeaf.InnerText; //设置结点的显示文字 treeRoot.Nodes.Add(treeLeaf); } }
Xpath
Xpath是XML文档的查询语言，就像SQL是关系型数据库的查询语言一样。
SelectSingleNode 选择一个节点
SelectNodes 以XmlNodesList 类的形式返回一个节点类型
View Code
private string Loadxml(string name) { XmlDocument xdoc = new XmlDocument(); //创建XmlDocument对象; xdoc.Load("message.xml"); //用虚拟路径转换为实际路径，读取XML文件。 XmlNode xnode = xdoc.DocumentElement.SelectSingleNode("//message[@msgno='" + name + "']/msg"); //通过XPath查找所需要的结点，关于XPath可以自己搜索相关信息。 return xnode.InnerText; //返回结点的内容。 }
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string file = @"c:\ipaddress.xml"; XmlDataDocument doc = new XmlDataDocument(); doc.Load(file); XmlNodeList nodes = doc.SelectNodes("IpAddress/content/ipinfo[@connetaddress='192.168.1.14' and @sport='6000']"); foreach (XmlNode node in nodes) { node.Attributes["state"].Value = "连接成功"; } doc.Save(file);
MSXML(Microsoft XML Core Services) 是一种XML语言解析器，用来解析XML语言。 它是基于COM的组件，因此使用MSXML先在项目中添加对MSXML的应用。
View Code
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using MSXML2; namespace msxmlDemo { public partial class Form1 : Form { private DOMDocument60 doc; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { doc = new DOMDocument60(); doc.load(@"famousBook.xml"); IXMLDOMNodeList nodes = doc.selectNodes("BookShop/Book"); IXMLDOMNode node = nodes.nextNode(); while (node != null) { IXMLDOMNode nameNode = node.firstChild; string nodeText = nameNode.text; listBox1.Items.Add(nodeText); node = nodes.nextNode(); } } private void listBox1_SelectedIndexChanged(object sender, EventArgs e) { string strItem = listBox1.SelectedItem.ToString(); IXMLDOMNode node = doc.selectSingleNode("BookShop/Book[Name='" + strItem + "']"); txtAuthor.Text = node.selectSingleNode("Author").text; txtDate.Text = node.selectSingleNode("Date").text; txtISBN.Text = node.attributes.getNamedItem("ISBN").text; txtMoney.Text = node.selectSingleNode("Money").text; txtName.Text = node.selectSingleNode("Name").text; txtOtherName.Text = node.selectSingleNode("OtherName").text; txtOut.Text = node.selectSingleNode("Out").text; } } }
XML序列化
类
public class Person { public Person() { } public Person(string _Name, string _ID) { Name = _Name; ID = _ID; } public string Name; public string ID; } [Serializable()] [XmlRoot] public class Manifest { private Head _Head; [XmlElement] public Head Head { get { return _Head; } set { _Head = value; } } private Declaration _Declaration; [XmlElement] public Declaration Declaration { get { return _Declaration; } set { _Declaration = value; } } } public class Head { string _MessageID = String.Empty; [XmlElement] public string MessageID { get { return _MessageID; } set { _MessageID = value; } } string _MessageType = String.Empty; [XmlAttribute] public string MessageType { get { return _MessageType; } set { _MessageType = value; } } string _SenderID = String.Empty; [XmlElement] public string SenderID { get { return _SenderID; } set { _SenderID = value; } } string _ReceiverID = String.Empty; [XmlElement] public string ReceiverID { get { return _ReceiverID; } set { _ReceiverID = value; } } } public class Declaration { }
View Code
private void Form2_Load(object sender, EventArgs e) { //Person person1 = new Person("悦桐", "HN372E1156008"); //XmlSerializer s = new XmlSerializer(typeof(Person)); //TextWriter w = new StreamWriter("person1.xml"); //s.Serialize(w, person1); //w.Close(); Manifest f = new Manifest(); f.Head = new Head(); f.Head.MessageID = "00001"; f.Head.MessageType = "Application"; f.Head.SenderID = "ZHHT"; f.Head.ReceiverID = "Somboy"; f.Declaration = new Declaration(); XmlSerializer s1 = new XmlSerializer(typeof(Manifest)); TextWriter w1 = new StreamWriter("mainfest1.xml"); s1.Serialize(w1, f); w1.Close(); }
DataSet 与 Xml
DataSet生成Xml
Current_DS_Grid = DBClass.GetDataSet(DBOperationClass.GY_SQL_Str, "tb_CurrentGongyiPara"); string fileName = ceFilePath + "\\" + "CurrentGongyiPara.xml"; DirectoryInfo ceDir = new DirectoryInfo(ceFilePath); if (ceDir.Exists) { } else { ceDir.Create(); } Current_DS_Grid.WriteXml(fileName, XmlWriteMode.WriteSchema);
Xml导入DataSet
DataSet xmlds = new DataSet(); xmlds.ReadXml(ceFilePath + "\\" + XMLfileName); dataGrid1.DataSource = xmlds.Tables[0];
注：本文部分代码来自《C#网络编程大讲堂》！！！