C#读取XML中元素和属性值的实现代码

<?xml version="1.0" encoding="utf-8"?>
<!--启明培训学校学生信息：
    1、一年级学生
    2、二年级学生 
  -->
  <school name="启明培训学校">
    <grades>
     <grade id="1" name="一年级">
         <classes>
         <class id="101" name="一班">
                 <teachers>
                    <teacher teach="语文"><teachername><![cdata[王军]]></teachername></teacher>
                    <teacher teach="数学"><teachername><![cdata[周杰]]></teachername></teacher>                             
                 </teachers>
                 <students>
                     <student id="10101">
                         <name>亢阳</name>
                          <sex>女</sex>
                     </student>
                     <student id="10102">
                         <name>田镇南</name>
                         <sex>男</sex>
                     </student>
                     <student id="10103">
                         <name>刘嘉</name>
                         <sex>女</sex>
                     </student>
                 </students>
         </class>
        </classes>
     </grade>
        <grade id="2" name="二年级">
         <classes>
         <class id="201" name="二班">
                 <teachers>
                    <teacher teach="语文"><teachername><![cdata[胡军]]></teachername></teacher>
                    <teacher teach="数学"><teachername><![cdata[王洁]]></teachername></teacher>            
                 </teachers>
                 <students >
                     <student id="20101">
                         <name>胡艳</name>
                          <sex>女</sex>
                     </student>
                     <student id="20102">
                         <name>张三</name>
                         <sex>男</sex>
                     </student>
                     <student id="20103">
                         <name>李四</name>
                         <sex>女</sex>
                     </student>
                 </students>
         </class>
        </classes>
     </grade>
</grades>    
  </school> 

  using system;
   using system.collections.generic;
   using system.linq;
   using system.text;
   using system.xml;
   namespace xmlreader
   {
     class xmlreader
     {
         static void main(string[] args)
         {
             string xmlfilepath = "school.xml";
             xmldocument doc = new xmldocument();
             doc.load(xmlfilepath);

             //学校  使用xpath表达式选择文档中所有的schoo的子节点
             xmlnodelist schoolnodelist = doc.selectnodes("/school");
             if (schoolnodelist != null)
             {
                 foreach (xmlnode schoolnode in schoolnodelist)
                 {
                     //通过attributes获得属性名为name的属性
                     string schoolname = schoolnode.attributes["name"].value;
                     console.writeline("学校：" + schoolname);

                     #region 年级
                     //通过selectsinglenode方法获得当前节点下的grades子节点
                     xmlnode gradesnode = schoolnode.selectsinglenode("grades");
                     if (gradesnode != null)
                     {
                         //通过childnodes属性获得grades的所有一级子节点
                         xmlnodelist gradenodelist = gradesnode.childnodes;
                         if (gradenodelist != null)
                         {
                             foreach (xmlnode gradenode in gradenodelist)
                             {
                                 console.writeline("\t");
                                 console.writeline("年级：" + gradenode.attributes["name"].value + "   id:" + gradenode.attributes["id"].value);

                                 #region 班级
                                 //通过selectsinglenode方法获得当前节点下的classes子节点
                                 xmlnode classesnode = gradenode.selectsinglenode("classes");
                                 if (classesnode != null)
                                 {
                                     //通过childnodes属性获得classes的所有一级子节点
                                     xmlnodelist classnodelist = classesnode.childnodes;
                                     if (classnodelist != null)
                                     {
                                         foreach (xmlnode classnode in classnodelist)
                                         {
                              console.writeline("  班级：" + classnode.attributes["name"].value + "    id:" + classnode.attributes["id"].value);

                                             #region 老师
                                             xmlnode teachersnode = classnode.selectsinglenode("teachers");
                                             if (teachersnode != null)
                                             {
                                                 xmlnodelist teachernodelist = teachersnode.childnodes;
                                                 if (teachernodelist != null)
                                                 {
                                                     foreach (xmlnode teachernode in teachernodelist)
                                                     {                                              
                                                         xmlnode teachernamenode = teachernode.firstchild;
                                                         xmlcdatasection cdate = (xmlcdatasection)teachernamenode.firstchild;
                                                         if (cdate != null)
                                                         {
                                             console.writeline("   "+teachernode.attributes["teach"].value + "老师："+cdate.innertext.trim())；                                                                                                       

                                                         }
                                                     }
                                                 }
                                             }
                                             #endregion  老师

                                                 #region 所有学生
                                                 xmlnode studentsnode = classnode.selectsinglenode("students");
                                                 if (studentsnode != null)
                                                 {
                                                     xmlnodelist studentnodelist = studentsnode.childnodes;
                                                     if (studentnodelist != null)
                                                     {
                                                         foreach (xmlnode studentnode in studentnodelist)
                                                         {
                                                             console.writeline("    学生：" + studentnode.attributes["id"].value);

                                                             //获取student的属性值name和文本
                                                             xmlnode stu1 = studentnode.firstchild;
                                                             xmlelement xe1 = (xmlelement)stu1;
                                                             if (xe1 != null)
                                                             {
                                                                 console.writeline("        姓名：" + xe1.innertext.trim());
                                                             }
                                                             //获取student的属性值sex和文本
                                                             xmlnode stu2 = studentnode.lastchild;
                                                             xmlelement xe2 = (xmlelement)stu2;
                                                             if (xe2 != null)
                                                             {
                                                                 console.writeline("        姓别：" + xe2.innertext.trim());
                                                             }
                                                         }
                                                     }
                                                 #endregion 所有学生
                                                 }
                                             }
                                         }
                                 #endregion 班级
                                     }
                                 }
                             }
                     #endregion  年级
                             console.write("\r\n按随意键跳出");
                             console.readkey();
                         }

                     }
                 }
             }
         }
     }