最近研究java的dom4j包,使用 dom4j包来操作了xml 文件
包括三个文件:studentInfo.xml(待解析的xml文件), Dom4jReadExmple.java(解析的主要类), TestDom4jReadExmple.java(测试解析的结果)
studentInfo.xml <?xml version="1.0" encoding="gb2312"?> |
|
<student> Dom4jReadExmple.java package dom4jExample.read; import java.io.File; import org.dom4j.Attribute; //获取学生姓名为"崔卫兵"的年龄 //获取学生姓名为"cwb"所在的学院名称 //获取学生姓名为"cwb"所在学院的领导 //获取学生姓名为"lxx"所在的学院名称 //获取学生姓名为"lxx"所在学院的领导 TestDom4jReadExmple.java package dom4jExample.read; import java.util.HashMap; /** |
运行结果
崔卫兵-age:25
cwbage:20
cwb-college:PC学院
cwb-college-leader:学院领导
lxx-college:yyyy学院
lxx-college-leader:leader
弄个综合的例子:
- package com.jim.beans;
- import java.io.File;
- import java.io.FileNotFoundException;
- import java.io.FileOutputStream;
- import java.io.FileWriter;
- import java.io.IOException;
- import java.io.OutputStreamWriter;
- import java.io.UnsupportedEncodingException;
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- import org.dom4j.Attribute;
- import org.dom4j.Document;
- import org.dom4j.DocumentException;
- import org.dom4j.DocumentHelper;
- import org.dom4j.Element;
- import org.dom4j.io.SAXReader;
- import org.dom4j.io.XMLWriter;
- public class DepartmentBean {
- private String ID; //主键,没有任何意义
- private String bh; //部门编号
- private String name; //部门名称
- private String tel; //部门电话
- private String address; //部门地址
- private File file; //要读取的 xml文件
- public DepartmentBean() {
- }
- public DepartmentBean(File file) {
- this.file = file;
- }
- public DepartmentBean(String id, String bh, String name, String tel, String address) {
- ID = id;
- this.bh = bh;
- this.name = name;
- this.tel = tel;
- this.address = address;
- }
- public String getAddress() {
- return address;
- }
- public void setAddress(String address) {
- this.address = address;
- }
- public String getBh() {
- return bh;
- }
- public void setBh(String bh) {
- this.bh = bh;
- }
- public String getID() {
- return ID;
- }
- public void setID(String id) {
- ID = id;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getTel() {
- return tel;
- }
- public void setTel(String tel) {
- this.tel = tel;
- }
- //查询若干个部门 支持模糊查询
- public ArrayList search(String attrName,String attrValue) throws DocumentException {
- ArrayList al = new ArrayList();
- List list = null;
- //File f = new File("d:\\department.xml"); //把要解析的xml文件包装成File类型
- SAXReader saxReader = new SAXReader(); //加载XML文档
- saxReader.setEncoding("UTF-8");
- Document document = saxReader.read(this.file);
- /* 采用了 dom4j 支持 xPath 这个用法 */
- if((attrName == null || attrName.trim().equals(""))
- ||(attrValue == null || attrValue.trim().equals(""))) {
- list = document.selectNodes("/departments/department");
- }else {
- //[注]: 下面这句采用的是 精确查询 等效于 某个属性=值
- //list = document.selectNodes("/departments/department[@"+attrName+"='"+attrValue+"']");
- //[注]: 下面这句采用的是 模糊查询 等效于 某个属性 like %值%
- list = document.selectNodes("/departments/department[contains(@"+attrName+",'" + attrValue + "')]");
- }
- Iterator iterator = list.iterator();
- DepartmentBean departmentBean = null;
- while(iterator.hasNext()) {
- Element element = (Element)iterator.next();
- departmentBean = new DepartmentBean();
- departmentBean.setID(<b style="color:black;background-color:#ffff66">element.attributeValue</b>("id"));
- departmentBean.setBh(<b style="color:black;background-color:#ffff66">element.attributeValue</b>("bh"));
- departmentBean.setName(<b style="color:black;background-color:#ffff66">element.attributeValue</b>("name"));
- departmentBean.setTel(<b style="color:black;background-color:#ffff66">element.attributeValue</b>("tel"));
- departmentBean.setAddress(<b style="color:black;background-color:#ffff66">element.attributeValue</b>("address"));
- al.add(departmentBean);
- }
- return al;
- }
- //查询某个部门
- public DepartmentBean getDepartment(String attrName,String attrValue) throws DocumentException {
- ArrayList al = search(attrName,attrValue);
- ) {
- );
- }else {
- return null;
- }
- }
- //添加部门
- public void add(DepartmentBean newDepartmentBean) throws DocumentException, IOException {
- Document document = DocumentHelper.createDocument();
- //创建根节点,并返回要节点
- Element departmentsElement = document.addElement("departments");
- departmentsElement.addComment("所有的部门信息");
- //向根节点departments中加入department子节点
- Element departmentElement = null;
- departmentElement = departmentsElement.addElement("department");
- departmentElement.addAttribute("id",newDepartmentBean.getID());
- departmentElement.addAttribute("bh",newDepartmentBean.getBh());
- departmentElement.addAttribute("name",newDepartmentBean.getName());
- departmentElement.addAttribute("tel",newDepartmentBean.getTel());
- departmentElement.addAttribute("address",newDepartmentBean.getAddress());
- //File f = new File("d:\\department.xml"); //把要解析的xml文件包装成File类型
- SAXReader saxReader = new SAXReader(); //加载XML文档
- saxReader.setEncoding("UTF-8");
- Document documentRead = saxReader.read(this.file);
- List list = documentRead.selectNodes("/departments/department");
- Iterator iterator = list.iterator();
- while(iterator.hasNext()) {
- departmentElement = departmentsElement.addElement("department");
- Element element = (Element)iterator.next();
- Attribute attrID = element.attribute("id");
- departmentElement.addAttribute("id",attrID.getValue());
- Attribute attrBh = element.attribute("bh");
- departmentElement.addAttribute("bh",attrBh.getValue());
- Attribute attrName = element.attribute("name");
- departmentElement.addAttribute("name",attrName.getValue());
- Attribute attrTel = element.attribute("tel");
- departmentElement.addAttribute("tel",attrTel.getValue());
- Attribute attrAddress = element.attribute("address");
- departmentElement.addAttribute("address",attrAddress.getValue());
- }
- //把修改后document写到原有的department.xml文件,以覆盖原有的department.xml文件
- XMLWriter output = new XMLWriter(new OutputStreamWriter(new FileOutputStream(this.file),"UTF-8"));
- output.write(document);
- output.close();
- }
- //编辑部门
- public void edit(String attrName,String attrValue,DepartmentBean newDepartmentBean) throws DocumentException, IOException {
- //File f = new File("d:\\department.xml"); //把要解析的xml文件包装成File类型
- SAXReader saxReader = new SAXReader(); //加载XML文档
- saxReader.setEncoding("UTF-8");
- Document document = saxReader.read(this.file);
- List list = null;
- Iterator iterator = null;
- if((attrName == null || attrName.trim().equals(""))
- ||(attrValue == null || attrValue.trim().equals(""))) { //如果设置的修改条件为 null ,则什么也不做
- return ;
- }else {
- list = document.selectNodes("/departments/department[@"+attrName+"='"+attrValue+"']");
- }
- ) { //如果设置的修改条件没有符合的记录,则什么也不做
- return ;
- }else {
- iterator = list.iterator();
- while(iterator.hasNext()) {
- Element e = (Element) iterator.next();
- Attribute attrB = e.attribute("bh");
- attrB.setValue(newDepartmentBean.getBh());
- Attribute attrN = e.attribute("name");
- attrN.setValue(newDepartmentBean.getName());
- Attribute attrT = e.attribute("tel");
- attrT.setValue(newDepartmentBean.getTel());
- Attribute attrA = e.attribute("address");
- attrA.setValue(newDepartmentBean.getAddress());
- }
- }
- //把修改后document写到原有的department.xml文件,以覆盖原有的department.xml文件
- XMLWriter output = new XMLWriter(new OutputStreamWriter(new FileOutputStream(this.file),"UTF-8"));
- output.write(document);
- output.close();
- }
- //删除部门
- public void del(String attrName,String attrValue) throws DocumentException, IOException {
- //File f = new File("d:\\department.xml"); //把要解析的xml文件包装成File类型
- SAXReader saxReader = new SAXReader(); //加载XML文档
- saxReader.setEncoding("UTF-8");
- Document documentRead = saxReader.read(this.file);
- Document documentWrite = null;
- List list = null;
- if((attrName == null || attrName.trim().equals(""))
- ||(attrValue == null || attrValue.trim().equals(""))) { //如果设置的修改条件为 null ,则什么也不做
- return ;
- }else {
- list = documentRead.selectNodes("/departments/department[@"+attrName+"!='"+attrValue+"']");
- }
- documentWrite = DocumentHelper.createDocument();
- Element departmentsElement = documentWrite.addElement("departments");
- departmentsElement.addComment("所有的部门信息");
- ) { //如果是全删除了,则什么也不做
- //把修改后document写到原有的department.xml文件,以覆盖原有的department.xml文件
- XMLWriter output = new XMLWriter(new OutputStreamWriter(new FileOutputStream(this.file),"UTF-8"));
- output.write(documentWrite);
- output.close();
- return ;
- }else {
- //向根节点departments中加入department子节点
- Element departmentElement = null;
- Iterator iterator = list.iterator();
- while(iterator.hasNext()) {
- departmentElement = departmentsElement.addElement("department");
- Element element = (Element)iterator.next();
- Attribute attrID = element.attribute("id");
- departmentElement.addAttribute("id",attrID.getValue());
- Attribute attrBh = element.attribute("bh");
- departmentElement.addAttribute("bh",attrBh.getValue());
- Attribute attrName2 = element.attribute("name");
- departmentElement.addAttribute("name",attrName2.getValue());
- Attribute attrTel = element.attribute("tel");
- departmentElement.addAttribute("tel",attrTel.getValue());
- Attribute attrAddress = element.attribute("address");
- departmentElement.addAttribute("address",attrAddress.getValue());
- }
- //把修改后document写到原有的department.xml文件,以覆盖原有的department.xml文件
- XMLWriter output = new XMLWriter(new OutputStreamWriter(new FileOutputStream(this.file),"UTF-8"));
- output.write(documentWrite);
- output.close();
- }
- }
- //得到 xml 文件中最大的主键值 + 1
- public int getMaxID() throws DocumentException {
- SAXReader saxReader = new SAXReader(); //加载XML文档
- saxReader.setEncoding("UTF-8");
- Document document = saxReader.read(this.file);
- List list = document.selectNodes("/departments/department");
- Iterator iterator = null;
- ;
- ) {
- ;
- }else {
- iterator = list.iterator();
- while(iterator.hasNext()) {
- Element element = (Element)iterator.next();
- String maxStr = <b style="color:black;background-color:#ffff66">element.attributeValue</b>("id");
- int maxInt = Integer.parseInt(maxStr);
- if(maxInt > max) {
- max = maxInt;
- }
- }
- }
- ;
- }
- public static void main(String[] args) throws DocumentException, IOException {
- File f = new File("d:\\department.xml");
- DepartmentBean db = new DepartmentBean(f);
- System.out.println(db.getMaxID());
- //大家可以在这里写一些调用上面的 search ,add , del , edit 方法代码来测试测试,department.xml 文件在附件中已上传了此外还要要到两个特殊的包一个名叫jaxen-1.1.1.jar,还有一个叫dom4j-1.6.1.jar大家可以自己下载
- }
- }
.net 操作XML小结
一、简单介绍
using System.Xml;
//初始化一个xml实例
XmlDocument xml=new XmlDocument();
//导入指定xml文件
xml.Load(path);
xml.Load(HttpContext.Current.Server.MapPath("~/file/bookstore.xml"));
//指定一个节点
XmlNode root=xml.SelectSingleNode("/root");
//获取节点下所有直接子节点
XmlNodeList childlist=root.ChildNodes;
//判断该节点下是否有子节点
root.HasChildNodes;
//获取同名同级节点集合
XmlNodeList nodelist=xml.SelectNodes("/Root/News");
//生成一个新节点
XmlElement node=xml.CreateElement("News");
//将节点加到指定节点下,作为其子节点
root.AppendChild(node);
//将节点加到指定节点下某个子节点前
root.InsertBefore(node,root.ChildeNodes[i]);
//为指定节点的新建属性并赋值
node.SetAttribute("id","11111");
//为指定节点添加子节点
root.AppendChild(node);
//获取指定节点的指定属性值
string id=node.Attributes["id"].Value;
//获取指定节点中的文本
string content=node.InnerText;
//保存XML文件
string path=Server.MapPath("~/file/bookstore.xml");
xml.Save(path);
//or use :xml.Save(HttpContext.Current.Server.MapPath("~/file/bookstore.xml"));
二、具体实例
在C#.net中如何操作XML
需要添加的命名空间:
using System.Xml;
定义几个公共对象:
XmlDocument xmldoc ;
XmlNode xmlnode ;
XmlElement xmlelem ;
1,创建到服务器同名目录下的xml文件:
方法一:
xmldoc = new XmlDocument ( ) ;
//加入XML的声明段落,<?xml version="1.0" encoding="gb2312"?>
XmlDeclaration xmldecl;
xmldecl = xmldoc.CreateXmlDeclaration("1.0","gb2312",null);
xmldoc.AppendChild ( xmldecl);
//加入一个根元素
xmlelem = xmldoc.CreateElement ( "" , "Employees" , "" ) ;
xmldoc.AppendChild ( xmlelem ) ;
//加入另外一个元素
for(int i=1;i<3;i++)
{
XmlNode root=xmldoc.SelectSingleNode("Employees");//查找<Employees>
XmlElement xe1=xmldoc.CreateElement("Node");//创建一个<Node>节点
xe1.SetAttribute("genre","李赞红");//设置该节点genre属性
xe1.SetAttribute("ISBN","2-3631-4");//设置该节点ISBN属性
XmlElement xesub1=xmldoc.CreateElement("title");
xesub1.InnerText="CS从入门到精通";//设置文本节点
xe1.AppendChild(xesub1);//添加到<Node>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);//添加到<Employees>节点中
}
//保存创建好的XML文档
xmldoc.Save ( Server.MapPath("data.xml") ) ;
//////////////////////////////////////////////////////////////////////////////////////
结果:在同名目录下生成了名为data.xml的文件,内容如下,
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
<Node 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>
</Node>
</Employees>
方法二:
XmlTextWriter xmlWriter;
string strFilename = Server.MapPath("data1.xml") ;
xmlWriter = new XmlTextWriter(strFilename,Encoding.Default);//创建一个xml文档
xmlWriter.Formatting = Formatting.Indented;
xmlWriter.WriteStartDocument();
xmlWriter.WriteStartElement("Employees");
xmlWriter.WriteStartElement("Node");
xmlWriter.WriteAttributeString("genre","李赞红");
xmlWriter.WriteAttributeString("ISBN","2-3631-4");
xmlWriter.WriteStartElement("title");
xmlWriter.WriteString("CS从入门到精通");
xmlWriter.WriteEndElement();
xmlWriter.WriteStartElement("author");
xmlWriter.WriteString("候捷");
xmlWriter.WriteEndElement();
xmlWriter.WriteStartElement("price");
xmlWriter.WriteString("58.3");
xmlWriter.WriteEndElement();
xmlWriter.WriteEndElement();
xmlWriter.Close();
//////////////////////////////////////////////////////////////////////////////////////
结果:
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
</Employees>
2,添加一个结点:
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load(Server.MapPath("data.xml"));
XmlNode root=xmlDoc.SelectSingleNode("Employees");//查找<Employees>
XmlElement xe1=xmlDoc.CreateElement("Node");//创建一个<Node>节点
xe1.SetAttribute("genre","张三");//设置该节点genre属性
xe1.SetAttribute("ISBN","1-1111-1");//设置该节点ISBN属性
XmlElement xesub1=xmlDoc.CreateElement("title");
xesub1.InnerText="C#入门帮助";//设置文本节点
xe1.AppendChild(xesub1);//添加到<Node>节点中
XmlElement xesub2=xmlDoc.CreateElement("author");
xesub2.InnerText="高手";
xe1.AppendChild(xesub2);
XmlElement xesub3=xmlDoc.CreateElement("price");
xesub3.InnerText="158.3";
xe1.AppendChild(xesub3);
root.AppendChild(xe1);//添加到<Employees>节点中
xmlDoc.Save ( Server.MapPath("data.xml") );
//////////////////////////////////////////////////////////////////////////////////////
结果:在xml原有的内容里添加了一个结点,内容如下,
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
<Node 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>
</Node>
<Node genre="张三" ISBN="1-1111-1">
<title>C#入门帮助</title>
<author>高手</author>
<price>158.3</price>
</Node>
</Employees>
3,修改结点的值(属性和子结点):
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load( Server.MapPath("data.xml") );
XmlNodeList nodeList=xmlDoc.SelectSingleNode("Employees").ChildNodes;//获取Employees节点的所有子节点
foreach(XmlNode xn in nodeList)//遍历所有子节点
{
XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
if(xe.GetAttribute("genre")=="张三")//如果genre属性值为“张三”
{
xe.SetAttribute("genre","update张三");//则修改该属性为“update张三”
XmlNodeList nls=xe.ChildNodes;//继续获取xe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
}
}
}
}
xmlDoc.Save( Server.MapPath("data.xml") );//保存。
//////////////////////////////////////////////////////////////////////////////////////
结果:将原来的所有结点的信息都修改了,xml的内容如下,
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
<Node 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>
</Node>
<Node genre="update张三" ISBN="1-1111-1">
<title>C#入门帮助</title>
<author>亚胜</author>
<price>158.3</price>
</Node>
</Employees>
4,修改结点(添加结点的属性和添加结点的自结点):
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load( Server.MapPath("data.xml") );
XmlNodeList nodeList=xmlDoc.SelectSingleNode("Employees").ChildNodes;//获取Employees节点的所有子节点
foreach(XmlNode xn in nodeList)
{
XmlElement xe=(XmlElement)xn;
xe.SetAttribute("test","111111");
XmlElement xesub=xmlDoc.CreateElement("flag");
xesub.InnerText="1";
xe.AppendChild(xesub);
}
xmlDoc.Save( Server.MapPath("data.xml") );
//////////////////////////////////////////////////////////////////////////////////////
结果:每个结点的属性都添加了一个,子结点也添加了一个,内容如下,
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node genre="李赞红" ISBN="2-3631-4" test="111111">
<title>CS从入门到精通</title>
<author>候捷</author>
<price>58.3</price>
<flag>1</flag>
</Node>
<Node genre="李赞红" ISBN="2-3631-4" test="111111">
<title>CS从入门到精通</title>
<author>候捷</author>
<price>58.3</price>
<flag>1</flag>
</Node>
<Node genre="update张三" ISBN="1-1111-1" test="111111">
<title>C#入门帮助</title>
<author>亚胜</author>
<price>158.3</price>
<flag>1</flag>
</Node>
</Employees>
5,删除结点中的某一个属性:
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load( Server.MapPath("data.xml") );
XmlNodeList xnl=xmlDoc.SelectSingleNode("Employees").ChildNodes;
foreach(XmlNode xn in xnl)
{
XmlElement xe=(XmlElement)xn;
xe.RemoveAttribute("genre");//删除genre属性
XmlNodeList nls=xe.ChildNodes;//继续获取xe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=="flag")//如果找到
{
xe.RemoveChild(xe2);//则删除
}
}
}
xmlDoc.Save( Server.MapPath("data.xml") );
//////////////////////////////////////////////////////////////////////////////////////]
结果:删除了结点的一个属性和结点的一个子结点,内容如下,
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node ISBN="2-3631-4" test="111111">
<title>CS从入门到精通</title>
<author>候捷</author>
<price>58.3</price>
</Node>
<Node ISBN="2-3631-4" test="111111">
<title>CS从入门到精通</title>
<author>候捷</author>
<price>58.3</price>
</Node>
<Node ISBN="1-1111-1" test="111111">
<title>C#入门帮助</title>
<author>亚胜</author>
<price>158.3</price>
</Node>
</Employees>
6,删除结点:
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load( Server.MapPath("data.xml") );
XmlNode root=xmlDoc.SelectSingleNode("Employees");
XmlNodeList xnl=xmlDoc.SelectSingleNode("Employees").ChildNodes;
for(int i=0;i<xnl.Count;i++)
{
XmlElement xe=(XmlElement)xnl.Item(i);
if(xe.GetAttribute("genre")=="张三")
{
root.RemoveChild(xe);
if(i<xnl.Count)i=i-1;
}
}
xmlDoc.Save( Server.MapPath("data.xml") );
//////////////////////////////////////////////////////////////////////////////////////]
结果:删除了符合条件的所有结点,原来的内容:
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
<Node 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>
</Node>
<Node genre="张三" ISBN="1-1111-1">
<title>C#入门帮助</title>
<author>高手</author>
<price>158.3</price>
</Node>
<Node genre="张三" ISBN="1-1111-1">
<title>C#入门帮助</title>
<author>高手</author>
<price>158.3</price>
</Node>
</Employees>
删除后的内容:
<?xml version="1.0" encoding="gb2312"?>
<Employees>
<Node 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>
</Node>
<Node 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>
</Node>
</Employees>
7,按照文本文件读取xml
System.IO.StreamReader myFile =new
System.IO.StreamReader(Server.MapPath("data.xml"),System.Text.Encoding.Default);
//注意System.Text.Encoding.Default
string myString = myFile.ReadToEnd();//myString是读出的字符串
myFile.Close();
三、高级应用
/*读取xml数据 两种xml方式*/
<aaa>
<bb>something</bb>
<cc>something</cc>
</aaa>
<aaa>
<add key="123" value="321"/>
</aaa>
/*第一种方法*/
DS.ReadXml("your xmlfile name");
Container.DataItem("bb");
Container.DataItem("cc");
DS.ReadXmlSchema("your xmlfile name");
/*第二种方法*/
<aaa>
<add key="123" value="321"/>
</aaa>
如果我要找到123然后取到321应该怎么写呢?
using System.XML;
XmlDataDocument xmlDoc = new System.Xml.XmlDataDocument();
xmlDoc.Load(@"c:\Config.xml");
XmlElement elem = xmlDoc.GetElementById("add");
string str = elem.Attributes["value"].Value
/*第三种方法: SelectSingleNode 读取两种格式的xml *---/
--------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<ConnectionString>Data Source=yf; user id=ctm_dbo;password=123</ConnectionString>
</appSettings>
</configuration>
--------------------------------------------------------------------------
XmlDocument doc = new XmlDocument();
doc.Load(strXmlName);
XmlNode node=doc.SelectSingleNode("/configuration/appSettings/ConnectionString");
if(node!=null)
{
string k1=node.Value; //null
string k2=node.InnerText;//Data Source=yf; user id=ctm_dbo;password=123
string k3=node.InnerXml;//Data Source=yf; user id=ctm_dbo;password=123
node=null;
}
********************************************************************
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="ConnectionString" value="Data Source=yf; user id=ctm_dbo;password=123" />
</appSettings>
</configuration>
**--------------------------------------------------------------------**
XmlNode node=doc.SelectSingleNode("/configuration/appSettings/add");
if(node!=null)
{
string k=node.Attributes["key"].Value;
string v=node.Attributes["value"].Value;
node=null;
}
*--------------------------------------------------------------------*
XmlNode node=doc.SelectSingleNode("/configuration/appSettings/add");
if(node!=null)
{
XmlNodeReader nr=new XmlNodeReader(node);
nr.MoveToContent();
//检查当前节点是否是内容节点。如果此节点不是内容节点,则读取器向前跳至下一个内容节点或文件结尾。
nr.MoveToAttribute("value");
string s=nr.Value;
node=null;
}