C#操作Xml：通过XmlDocument读写Xml文档

<?xml version="1.0" encoding="utf-8" ?>

<students>

  <!--我是一段注释文字-->

  <student name="张平">

    <courses>

      <course name="语文?">

        <teacherComment>

          <![CDATA[

        这里是语文老师的批注

        ]]>

        </teacherComment>     

    </course>

      <course name="数学">

        <teacherComment>

          <![CDATA[

        这里是数学老师的批注

        ]]>

        </teacherComment>

      </course>

    </courses>

  </student>

</students>

/*玉开博客 http://www.cnblogs.com/yukaizhao/ */

using System;

using System.Collections.Generic;

using System.Text;

using System.Xml;

namespace XmlExample

{

    class Program

    {

        static void Main(string[] args)

        {

            string xmlFilePath = @"X:\about.net\example\XmlExample\1.xml";

            XmlDocument doc = new XmlDocument();

            doc.Load(xmlFilePath);

            //使用xpath表达式选择文档中所有的student子节点

            XmlNodeList studentNodeList = doc.SelectNodes("/students/student");

            if (studentNodeList != null)

            {

                foreach (XmlNode studentNode in studentNodeList)

                {

                    //通过Attributes获得属性名字为name的属性

                    string name = studentNode.Attributes["name"].Value;

                    Console.WriteLine("Student:" + name);

                    //通过SelectSingleNode方法获得当前节点下的courses子节点

                    XmlNode coursesNode = studentNode.SelectSingleNode("courses");

                    //通过ChildNodes属性获得courseNode的所有一级子节点

                    XmlNodeList courseNodeList = coursesNode.ChildNodes;

                    if (courseNodeList != null)

                    {

                        foreach (XmlNode courseNode in courseNodeList)

                        {

                            Console.Write("\t");

                            Console.Write(courseNode.Attributes["name"].Value);

                            Console.Write("老师评语");

                            //通过FirstNode属性可以获得课程节点的第一个子节点，LastNode可以获得最后一个子节点

                            XmlNode teacherCommentNode = courseNode.FirstChild;

                            //读取CData节点

                            XmlCDataSection cdata = (XmlCDataSection)teacherCommentNode.FirstChild;

                            Console.WriteLine(cdata.InnerText.Trim());

                        }

                    }

                }

            }

            Console.Write("\r\nPress any key to continue....");

            Console.Read();

        }

    }

}

/*玉开博客 http://www.cnblogs.com/yukaizhao/ */

using System;

using System.Collections.Generic;

using System.Text;

using System.Xml;

namespace WriteXml

{

    class Program

    {

        static void Main(string[] args)

        {

            XmlDocument xmlDoc = new XmlDocument();

            //创建Xml声明部分，即<?xml version="1.0" encoding="utf-8" ?>

            xmlDoc.CreateXmlDeclaration("1.0", "utf-8", "yes");

            //创建根节点

            XmlNode rootNode = xmlDoc.CreateElement("students");

            //创建student子节点

            XmlNode studentNode = xmlDoc.CreateElement("student");

            //创建一个属性

            XmlAttribute nameAttribute = xmlDoc.CreateAttribute("name");

            nameAttribute .Value = "张同学";

            //xml节点附件属性

            studentNode.Attributes.Append(nameAttribute);

            //创建courses子节点

            XmlNode coursesNode = xmlDoc.CreateElement("courses");

            XmlNode courseNode1 = xmlDoc.CreateElement("course");

            XmlAttribute courseNameAttr = xmlDoc.CreateAttribute("name");

            courseNameAttr.Value = "语文";

            courseNode1.Attributes.Append(courseNameAttr);

            XmlNode teacherCommentNode = xmlDoc.CreateElement("teacherComment");

            //创建Cdata块

            XmlCDataSection cdata = xmlDoc.CreateCDataSection("<font color=\"red\">这是语文老师的批注</font>");

            teacherCommentNode.AppendChild(cdata);

            courseNode1.AppendChild(teacherCommentNode);

            coursesNode.AppendChild(courseNode1);

            //附加子节点

            studentNode.AppendChild(coursesNode);

            rootNode.AppendChild(studentNode);

            //附加根节点

            xmlDoc.AppendChild(rootNode);

            //保存Xml文档

            xmlDoc.Save(@"d:\test.xml");

            Console.WriteLine("已保存Xml文档");

        }

    }

}