.Net中处理XML的常用API

最新推荐文章于 2022-06-13 16:26:56 发布

Jeff Xiong

最新推荐文章于 2022-06-13 16:26:56 发布

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分类专栏： XML C# .Net 常用算法贴（C#）文章标签： xml .net xsl 出版编程

本文链接：https://blog.youkuaiyun.com/ghostbear/article/details/7333123

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本文深入探讨.NET中处理XML的常用API，包括XMLReader、XmlWriter、XPath、XSLT等，通过示例展示了如何读取、写入、验证XML文件，并介绍了XML与DataSet的交互，以及XML序列化与反序列化过程。

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.Net中处理XML的常用API

.Net对XML提供了丰富的API，但大多数都在日常开发中涉及不到。先总结下一些使用频繁的API与大家分享。

测试数据

bookstore.xml

<?xml version="1.0" encoding="utf-8" ?>
<?xml-stylesheet type="text/xsl" href="bookstore.xslt"?>
<bookstore>
  <books>
    <book id="1">
      <name>十万个为什么</name>
      <price>30</price>
      <author>为什么先生</author>
      <publisher>火星出版社</publisher>
      <publisher-time>2012年12月12日</publisher-time>
    </book>
    <book id="2">
      <name>客官不要嘛</name>
      <price>10</price>
      <author>客官</author>
      <publisher>马虎出版社</publisher>
      <publisher-time>2011年8月8日</publisher-time>
    </book>
    <book id="3">
      <name>vb编程</name>
      <price>49</price>
      <author>逍遥哥</author>
      <publisher>逍遥出版社</publisher>
      <publisher-time>2010年5月8日</publisher-time>
    </book>
    <book id="4">
      <name>vf编程</name>
      <price>40</price>
      <author>逍遥妹</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2003年4月2日</publisher-time>
    </book>
    <book id="5">
      <name>c#编程入门</name>
      <price>50</price>
      <author>c#高手</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2002年2月3日</publisher-time>
    </book>
    <book id="6">
      <name>vb.net编程入门</name>
      <price>69</price>
      <author>vb哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="7">
      <name>c#电子商务编程</name>
      <price>90</price>
      <author>电商哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="8">
      <name>sql server 2000编程</name>
      <price>45</price>
      <author>sql哥</author>
      <publisher>GG出版社</publisher>
      <publisher-time>2005年5月30日</publisher-time>
    </book>
    <book id="9">
      <name>oracle 9i 编程</name>
      <price>88</price>
      <author>oracle哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2006年12月30日</publisher-time>
    </book>
    <book id="10">
      <name>sql server 2008入门经典</name>
      <price>70</price>
      <author>sql server08</author>
      <publisher>wrox出版社</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
  </books>
  <media>
    <cd id="1">
      <name>爱你不容易</name>
      <author>刘德华</author>
      <price>99</price>
      <publish-time>2006年1月1日</publish-time>
    </cd>
  </media>
</bookstore>

books.xsd

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="Book"
    targetNamespace="http://tempuri.org/Book.xsd"
    elementFormDefault="qualified"
    xmlns="http://tempuri.org/Book.xsd"
    xmlns:mstns="http://tempuri.org/Book.xsd"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:element name="Books">
   <xs:complexType>
      <xs:sequence>
      <xs:element name="book">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Name"></xs:element>
              <xs:element name="ISBN"></xs:element>
              <xs:element name="Author"></xs:element>
              <xs:element name="Publisher"></xs:element>
              <xs:element name="Price"></xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

demobook.xml

<?xml version="1.0" encoding="utf-8" ?>
<Books xmlns="http://tempuri.org/Book.xsd">
  <book>
    <Name>c#入门经典</Name>
    <ISBN>P1234567890</ISBN>
    <Author>王小帅</Author>
    <Publisher>清华出版社</Publisher>
    <Price>59</Price>
  </book>
  <book>
    <Name>c#入门经典</Name>
    <ISBN>P1234567890</ISBN>
    <Author>王小帅</Author>
    <Publisher>清华出版社</Publisher>
    <Price>59</Price>
  </book>
</Books>

bookstore.xslt

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:msxsl="urn:schemas-microsoft-com:xslt"
    xmlns:wrox="http://www.wrox.com"
    exclude-result-prefixes="msxsl"
>

    <xsl:output method="xml" indent="yes"/>

    <xsl:template match="/">
       <html>
         <head>
           <title>bookstore</title>
         </head>
         <body>
           <h1>图书</h1>
           <table width="60%" border="1" cellpadding="5" cellspacing="0" bordercolor="#000000">
             <tr>
               <th>书名</th>
               <th>价格</th>
               <th>作者</th>
               <th>出版社</th>
             </tr>
             <xsl:apply-templates select="/bookstore/books"></xsl:apply-templates>
           </table>
           
           <h1>音像制品</h1>
           <ul>
             <xsl:apply-templates select="/bookstore/media"></xsl:apply-templates>
           </ul>
           </body>
       </html>
    </xsl:template>
  
  <xsl:template match="/bookstore/books">
    <xsl:for-each select="./book">
      <tr>
        <td>
          <xsl:value-of select="./name"/>
        </td>
        <td>
          <xsl:value-of select="./price"/>
        </td>
        <td>
          <xsl:value-of select="./author"/>
        </td>
        <td>
          <xsl:value-of select="./publisher"/>
        </td>
      </tr>
    </xsl:for-each>
  </xsl:template>
  <xsl:template match="/bookstore/media">
    <xsl:for-each select="cd">
      <li>
       <xsl:value-of select="./name"/>
      </li>
    </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

Book.cs（支持xml序列化的类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Xml.Serialization;

namespace chapter33
{
    [XmlRoot()]
    public class book
    {
        public book()
        { 
        
        }

        [XmlAttribute(AttributeName="id")]
        public int Id { get; set; }

        [XmlElement(ElementName="name")]
        public string Name { get; set; }

        [XmlElement(ElementName="price")]
        public string Price { get; set; }

        [XmlElement(ElementName="author")]
        public string Author { get; set; }

        [XmlElement(ElementName="publisher")]
        public string Publisher { get; set; }

        [XmlElement(ElementName="publishertime")]
        public string PublisherTime { get; set; }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("id:{0}", Id);
            sb.AppendFormat("name:{0}", Name);
            sb.AppendFormat("price:{0}", Price);
            sb.AppendFormat("author:{0}", Author);
            sb.AppendFormat("publisher:{0}", Publisher);
            sb.AppendFormat("publishertime:{0}", PublisherTime);

            return sb.ToString();

        }
    }
}

XmlReader

该类提供读取XML的能力，它是个单向读取数据的游标。

DEMO

            //XmlReader的使用,2层xmlread循环读取。打印出所有book节点下的name节点中保存的内容
            
            XmlReader reader = XmlReader.Create("d:\\bookstore.xml");
            int tmpIndex = 1;
            while (reader.Read())
            {
                //Console.WriteLine(reader.Value);
                if (reader.NodeType == XmlNodeType.Element && reader.Name.ToLower() == "book")
                {
                    tmpIndex = int.Parse(reader.GetAttribute("id"));
                    using (var tmpReader = reader.ReadSubtree())
                    {
                        while (tmpReader.Read())
                        {
                            if (tmpReader.NodeType == XmlNodeType.Element && tmpReader.Name.ToLower() == "name")
                            {
                                Console.WriteLine("["+tmpIndex.ToString()+"]"+tmpReader.ReadString());
                            }
                        }
                    }
                }
            }

            reader.Close();

执行结果：

[1]十万个为什么
[2]客官不要嘛
[3]vb编程
[4]vf编程
[5]c#编程入门
[6]vb.net编程入门
[7]c#电子商务编程
[8]sql server 2000编程
[9]oracle 9i 编程
[10]sql server 2008入门经典

XmlReader和XSD

XSD是XML的架构文件，用来验证XML是否符合规定。XmlReader在读取XML文件的时候可以通过关联XSD文件来保证所读取的内容都是合法的。

DEMO

            //结合Xsd的XmlReader
           
            XmlReaderSettings settings = new XmlReaderSettings();
            settings.Schemas.Add("http://tempuri.org/Book.xsd", "d:\\Book.xsd");
            settings.ValidationEventHandler += (s, e) => { Console.WriteLine("ValidationEvent!"); };

            XmlReader reader2=XmlReader.Create("d:\\DemoBook.xml",settings);
            while(reader2.Read())
            {
                Console.WriteLine(reader2.ReadString());
            }
            reader2.Close();

   public static bool IsValidXml2(string xsdContent,string xmlContent)
        { 
           
            MemoryStream xsdStream = new MemoryStream(Encoding.ASCII.GetBytes(xsdContent));
            MemoryStream xmlStream=new MemoryStream(Encoding.ASCII.GetBytes(xmlContent));
            
            bool isOk = true;
            using (XmlReader schemaReader = XmlReader.Create(xsdStream))
            {
                XmlSchema schema = XmlSchema.Read(schemaReader, null);
                XDocument xdoc = XDocument.Load(xmlStream);
                XmlSchemaSet schemas = new XmlSchemaSet();
                schemas.Add(schema);
                try
                {
                    xdoc.Validate(schemas, null);
                }
                catch (XmlSchemaValidationException)
                {

                    isOk = false;
                }
            }
            return isOk;
        }

执行结果

P1234567890

王小帅

清华出版社

c#入门经典

P1234567890

王小帅

清华出版社

XmlWriter

DEMO

//XmlWriter
           
            XmlWriterSettings settings=new XmlWriterSettings();
            settings.Encoding=Encoding.UTF8;
            settings.Indent=true;

            XmlWriter writer = XmlWriter.Create("d:\\tmpWriter.xml",settings);

            writer.WriteStartDocument();
                writer.WriteStartElement("Books");
                writer.WriteStartElement("Book");
                writer.WriteStartAttribute("id");
                writer.WriteValue(1);
                writer.WriteEndAttribute();
                writer.WriteStartElement("Name");
                writer.WriteValue("十万个为什么");
                writer.WriteEndElement();
                writer.WriteEndElement();

                writer.WriteStartElement("Book");
                writer.WriteStartAttribute("id");
                writer.WriteValue(2);
                writer.WriteEndAttribute();
                writer.WriteStartElement("Name");
                writer.WriteValue("客官不可以");
                writer.WriteEndElement();
                writer.WriteEndElement();

                writer.WriteStartElement("Book");
                writer.WriteStartAttribute("id");
                writer.WriteValue(3);
                writer.WriteEndAttribute();
                writer.WriteStartElement("Name");
                writer.WriteValue("心朝大海");
                writer.WriteEndElement();
                writer.WriteEndElement();

                writer.WriteStartElement("Book");
                writer.WriteStartAttribute("id");
                writer.WriteValue(4);
                writer.WriteEndAttribute();
                writer.WriteStartElement("Name");
                writer.WriteValue("春暖花开");
                writer.WriteEndElement();
                writer.WriteEndElement();
                writer.WriteEndElement();
            writer.WriteEndDocument();
            writer.Close();

执行结果

<?xml version="1.0" encoding="utf-8" ?>
<?xml-stylesheet type="text/xsl" href="bookstore.xslt"?>
<bookstore>
  <books>
    <book id="1">
      <name>十万个为什么</name>
      <price>30</price>
      <author>为什么先生</author>
      <publisher>火星出版社</publisher>
      <publisher-time>2012年12月12日</publisher-time>
    </book>
    <book id="2">
      <name>客官不要嘛</name>
      <price>10</price>
      <author>客官</author>
      <publisher>马虎出版社</publisher>
      <publisher-time>2011年8月8日</publisher-time>
    </book>
    <book id="3">
      <name>vb编程</name>
      <price>49</price>
      <author>逍遥哥</author>
      <publisher>逍遥出版社</publisher>
      <publisher-time>2010年5月8日</publisher-time>
    </book>
    <book id="4">
      <name>vf编程</name>
      <price>40</price>
      <author>逍遥妹</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2003年4月2日</publisher-time>
    </book>
    <book id="5">
      <name>c#编程入门</name>
      <price>50</price>
      <author>c#高手</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2002年2月3日</publisher-time>
    </book>
    <book id="6">
      <name>vb.net编程入门</name>
      <price>69</price>
      <author>vb哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="7">
      <name>c#电子商务编程</name>
      <price>90</price>
      <author>电商哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="8">
      <name>sql server 2000编程</name>
      <price>45</price>
      <author>sql哥</author>
      <publisher>GG出版社</publisher>
      <publisher-time>2005年5月30日</publisher-time>
    </book>
    <book id="9">
      <name>oracle 9i 编程</name>
      <price>88</price>
      <author>oracle哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2006年12月30日</publisher-time>
    </book>
    <book id="10">
      <name>sql server 2008入门经典</name>
      <price>70</price>
      <author>sql server08</author>
      <publisher>wrox出版社</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
  </books>
  <media>
    <cd id="1">
      <name>爱你不容易</name>
      <author>刘德华</author>
      <price>99</price>
      <publish-time>2006年1月1日</publish-time>
    </cd>
  </media>
</bookstore>

XML DOM

DEMO

 XmlDocument doc = new XmlDocument();
            doc.Load("d:\\bookstore.xml");

            XmlNodeList nodes = doc.SelectNodes("//name");//xpath表达式

            //foreach (XmlNode tmp in nodes)
            //{
            //    Console.WriteLine(tmp.InnerText);
            //}

            XmlElement node = doc.CreateElement("book");
            var id = doc.CreateAttribute("id");
            id.Value = "88";
            node.Attributes.Append(id);
            XmlElement name = doc.CreateElement("name");
            XmlElement price=doc.CreateElement("price");
            XmlElement author=doc.CreateElement("author");
            XmlElement publisher=doc.CreateElement("publisher");
            XmlElement publishertime=doc.CreateElement("publisher-time");

            name.InnerText = "酱油秘方";
            price.InnerText = "29.5";
            author.InnerText = "酱油男";
            publisher.InnerText = "酱油铺子";
            publishertime.InnerText = "2011年10月2日";

            node.AppendChild(name);
            node.AppendChild(price);
            node.AppendChild(author);
            node.AppendChild(publisher);
            node.AppendChild(publishertime);

            XmlNode nodes2 = doc.SelectSingleNode("//books");
            nodes2.AppendChild(node);

            doc.Save("d:\\bookstore2.xml");

执行结果

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/xsl" href="bookstore.xslt"?>
<bookstore>
  <books>
    <book id="1">
      <name>十万个为什么</name>
      <price>30</price>
      <author>为什么先生</author>
      <publisher>火星出版社</publisher>
      <publisher-time>2012年12月12日</publisher-time>
    </book>
    <book id="2">
      <name>客官不要嘛</name>
      <price>10</price>
      <author>客官</author>
      <publisher>马虎出版社</publisher>
      <publisher-time>2011年8月8日</publisher-time>
    </book>
    <book id="3">
      <name>vb编程</name>
      <price>49</price>
      <author>逍遥哥</author>
      <publisher>逍遥出版社</publisher>
      <publisher-time>2010年5月8日</publisher-time>
    </book>
    <book id="4">
      <name>vf编程</name>
      <price>40</price>
      <author>逍遥妹</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2003年4月2日</publisher-time>
    </book>
    <book id="5">
      <name>c#编程入门</name>
      <price>50</price>
      <author>c#高手</author>
      <publisher>清华出版社</publisher>
      <publisher-time>2002年2月3日</publisher-time>
    </book>
    <book id="6">
      <name>vb.net编程入门</name>
      <price>69</price>
      <author>vb哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="7">
      <name>c#电子商务编程</name>
      <price>90</price>
      <author>电商哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="8">
      <name>sql server 2000编程</name>
      <price>45</price>
      <author>sql哥</author>
      <publisher>GG出版社</publisher>
      <publisher-time>2005年5月30日</publisher-time>
    </book>
    <book id="9">
      <name>oracle 9i 编程</name>
      <price>88</price>
      <author>oracle哥</author>
      <publisher>wrox</publisher>
      <publisher-time>2006年12月30日</publisher-time>
    </book>
    <book id="10">
      <name>sql server 2008入门经典</name>
      <price>70</price>
      <author>sql server08</author>
      <publisher>wrox出版社</publisher>
      <publisher-time>2001年1月30日</publisher-time>
    </book>
    <book id="88">
      <name>酱油秘方</name>
      <price>29.5</price>
      <author>酱油男</author>
      <publisher>酱油铺子</publisher>
      <publisher-time>2011年10月2日</publisher-time>
    </book>
  </books>
  <media>
    <cd id="1">
      <name>爱你不容易</name>
      <author>刘德华</author>
      <price>99</price>
      <publish-time>2006年1月1日</publish-time>
    </cd>
  </media>
</bookstore>

XPathDocument,XpathNavigator,XPathNodeIterator

DEMO

            XPathDocument doc = new XPathDocument("d:\\bookstore.xml");
            XPathNavigator nav = ((IXPathNavigable)doc).CreateNavigator();
            XPathNodeIterator iter = nav.Select("//book[@id=4]");

            while (iter.MoveNext())
            {
                var nav2 = iter.Current.Select("name");
                while (nav2.MoveNext())
                {
                    Console.WriteLine(nav2.Current.Value);
                }
            }

执行结果

vf编程

Xslt

Xslt是Xml中的重要级技术，Xslt往往能轻易的解决一些复杂的问题。

DEMO

            XslCompiledTransform xsl = new XslCompiledTransform();
            xsl.Load("d:\\bookstore.xslt");
            xsl.Transform("d:\\bookstore.xml", "d:\\bookstore.html");

执行结果

DataSet与XML

DataSet可以导出问XML文件，XML文件也可以实例化为DataSet。

DEMO

SqlConnection conn = new SqlConnection("data source=192.168.6.4;initial catalog=chapter30;uid=sa;pwd=123456;");
               SqlCommand cmd = new SqlCommand("select * from student",conn);
               SqlDataAdapter adapter = new SqlDataAdapter(cmd);
               DataSet ds = new DataSet();

               try
               {
                   conn.Open();
                   adapter.Fill(ds, "Student");

               }
               catch
               {
               }
               finally
               {
                   conn.Close();
               }
               ds.WriteXml("d:\\Student.xml", XmlWriteMode.WriteSchema);
               ds.WriteXml("d:\\Student2.xml", XmlWriteMode.DiffGram);
               ds.WriteXml("d:\\Student3.xml", XmlWriteMode.IgnoreSchema);

执行结果

student.xml

<?xml version="1.0" standalone="yes"?>
<NewDataSet>
  <xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="Student">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="Id" type="xs:int" minOccurs="0" />
                <xs:element name="Name" type="xs:string" minOccurs="0" />
                <xs:element name="Age" type="xs:string" minOccurs="0" />
                <xs:element name="Grade" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <Student>
    <Id>1</Id>
    <Name>jim       </Name>
    <Age>11        </Age>
    <Grade>5         </Grade>
  </Student>
  <Student>
    <Id>2</Id>
    <Name>lucy      </Name>
    <Age>12        </Age>
    <Grade>6         </Grade>
  </Student>
  <Student>
    <Id>3</Id>
    <Name>ben       </Name>
    <Age>8         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>4</Id>
    <Name>clark     </Name>
    <Age>5         </Age>
    <Grade>2         </Grade>
  </Student>
  <Student>
    <Id>5</Id>
    <Name>bob       </Name>
    <Age>12        </Age>
    <Grade>6         </Grade>
  </Student>
  <Student>
    <Id>6</Id>
    <Name>bomb      </Name>
    <Age>11        </Age>
    <Grade>8         </Grade>
  </Student>
  <Student>
    <Id>10</Id>
    <Name>熊宸        </Name>
    <Age>25        </Age>
    <Grade>硕士        </Grade>
  </Student>
  <Student>
    <Id>11</Id>
    <Name>灵月如       </Name>
    <Age>16        </Age>
    <Grade>高中        </Grade>
  </Student>
  <Student>
    <Id>13</Id>
    <Name>着         </Name>
    <Age>1         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>14</Id>
    <Name>55        </Name>
    <Age>55        </Age>
    <Grade>55        </Grade>
  </Student>
  <Student>
    <Id>16</Id>
    <Name>superbomb </Name>
    <Age>12        </Age>
    <Grade>11        </Grade>
  </Student>
  <Student>
    <Id>22</Id>
    <Name>Chrimas   </Name>
    <Age>22        </Age>
    <Grade>10        </Grade>
  </Student>
  <Student>
    <Id>555</Id>
    <Name>wcf       </Name>
    <Age>1         </Age>
    <Grade>10        </Grade>
  </Student>
  <Student>
    <Id>666</Id>
    <Name>superbomb </Name>
    <Age>1         </Age>
    <Grade>999       </Grade>
  </Student>
  <Student>
    <Id>1234</Id>
    <Name>1         </Name>
    <Age>2         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>9876</Id>
    <Name>superman  </Name>
    <Age>10        </Age>
    <Grade>9999      </Grade>
  </Student>
</NewDataSet>

student2.xml

<?xml version="1.0" standalone="yes"?>
<diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
  <NewDataSet>
    <Student diffgr:id="Student1" msdata:rowOrder="0">
      <Id>1</Id>
      <Name>jim       </Name>
      <Age>11        </Age>
      <Grade>5         </Grade>
    </Student>
    <Student diffgr:id="Student2" msdata:rowOrder="1">
      <Id>2</Id>
      <Name>lucy      </Name>
      <Age>12        </Age>
      <Grade>6         </Grade>
    </Student>
    <Student diffgr:id="Student3" msdata:rowOrder="2">
      <Id>3</Id>
      <Name>ben       </Name>
      <Age>8         </Age>
      <Grade>3         </Grade>
    </Student>
    <Student diffgr:id="Student4" msdata:rowOrder="3">
      <Id>4</Id>
      <Name>clark     </Name>
      <Age>5         </Age>
      <Grade>2         </Grade>
    </Student>
    <Student diffgr:id="Student5" msdata:rowOrder="4">
      <Id>5</Id>
      <Name>bob       </Name>
      <Age>12        </Age>
      <Grade>6         </Grade>
    </Student>
    <Student diffgr:id="Student6" msdata:rowOrder="5">
      <Id>6</Id>
      <Name>bomb      </Name>
      <Age>11        </Age>
      <Grade>8         </Grade>
    </Student>
    <Student diffgr:id="Student7" msdata:rowOrder="6">
      <Id>10</Id>
      <Name>熊宸        </Name>
      <Age>25        </Age>
      <Grade>硕士        </Grade>
    </Student>
    <Student diffgr:id="Student8" msdata:rowOrder="7">
      <Id>11</Id>
      <Name>灵月如       </Name>
      <Age>16        </Age>
      <Grade>高中        </Grade>
    </Student>
    <Student diffgr:id="Student9" msdata:rowOrder="8">
      <Id>13</Id>
      <Name>着         </Name>
      <Age>1         </Age>
      <Grade>3         </Grade>
    </Student>
    <Student diffgr:id="Student10" msdata:rowOrder="9">
      <Id>14</Id>
      <Name>55        </Name>
      <Age>55        </Age>
      <Grade>55        </Grade>
    </Student>
    <Student diffgr:id="Student11" msdata:rowOrder="10">
      <Id>16</Id>
      <Name>superbomb </Name>
      <Age>12        </Age>
      <Grade>11        </Grade>
    </Student>
    <Student diffgr:id="Student12" msdata:rowOrder="11">
      <Id>22</Id>
      <Name>Chrimas   </Name>
      <Age>22        </Age>
      <Grade>10        </Grade>
    </Student>
    <Student diffgr:id="Student13" msdata:rowOrder="12">
      <Id>555</Id>
      <Name>wcf       </Name>
      <Age>1         </Age>
      <Grade>10        </Grade>
    </Student>
    <Student diffgr:id="Student14" msdata:rowOrder="13">
      <Id>666</Id>
      <Name>superbomb </Name>
      <Age>1         </Age>
      <Grade>999       </Grade>
    </Student>
    <Student diffgr:id="Student15" msdata:rowOrder="14">
      <Id>1234</Id>
      <Name>1         </Name>
      <Age>2         </Age>
      <Grade>3         </Grade>
    </Student>
    <Student diffgr:id="Student16" msdata:rowOrder="15">
      <Id>9876</Id>
      <Name>superman  </Name>
      <Age>10        </Age>
      <Grade>9999      </Grade>
    </Student>
  </NewDataSet>
</diffgr:diffgram>

student3.xml

<?xml version="1.0" standalone="yes"?>
<NewDataSet>
  <Student>
    <Id>1</Id>
    <Name>jim       </Name>
    <Age>11        </Age>
    <Grade>5         </Grade>
  </Student>
  <Student>
    <Id>2</Id>
    <Name>lucy      </Name>
    <Age>12        </Age>
    <Grade>6         </Grade>
  </Student>
  <Student>
    <Id>3</Id>
    <Name>ben       </Name>
    <Age>8         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>4</Id>
    <Name>clark     </Name>
    <Age>5         </Age>
    <Grade>2         </Grade>
  </Student>
  <Student>
    <Id>5</Id>
    <Name>bob       </Name>
    <Age>12        </Age>
    <Grade>6         </Grade>
  </Student>
  <Student>
    <Id>6</Id>
    <Name>bomb      </Name>
    <Age>11        </Age>
    <Grade>8         </Grade>
  </Student>
  <Student>
    <Id>10</Id>
    <Name>熊宸        </Name>
    <Age>25        </Age>
    <Grade>硕士        </Grade>
  </Student>
  <Student>
    <Id>11</Id>
    <Name>灵月如       </Name>
    <Age>16        </Age>
    <Grade>高中        </Grade>
  </Student>
  <Student>
    <Id>13</Id>
    <Name>着         </Name>
    <Age>1         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>14</Id>
    <Name>55        </Name>
    <Age>55        </Age>
    <Grade>55        </Grade>
  </Student>
  <Student>
    <Id>16</Id>
    <Name>superbomb </Name>
    <Age>12        </Age>
    <Grade>11        </Grade>
  </Student>
  <Student>
    <Id>22</Id>
    <Name>Chrimas   </Name>
    <Age>22        </Age>
    <Grade>10        </Grade>
  </Student>
  <Student>
    <Id>555</Id>
    <Name>wcf       </Name>
    <Age>1         </Age>
    <Grade>10        </Grade>
  </Student>
  <Student>
    <Id>666</Id>
    <Name>superbomb </Name>
    <Age>1         </Age>
    <Grade>999       </Grade>
  </Student>
  <Student>
    <Id>1234</Id>
    <Name>1         </Name>
    <Age>2         </Age>
    <Grade>3         </Grade>
  </Student>
  <Student>
    <Id>9876</Id>
    <Name>superman  </Name>
    <Age>10        </Age>
    <Grade>9999      </Grade>
  </Student>
</NewDataSet>

XML的序列化和反序列化

DEMO

//类文件的序列化和反序列化
            //序列化
            
            book book1 = new book();
            book1.Id = 1;
            book1.Name = "十万个为什么";
            book1.Price = "55";
            book1.Publisher = "安童生聚乐部";
            book1.PublisherTime = "2011年12月12日";

            Console.WriteLine(book1.ToString());

            XmlWriter writer = XmlWriter.Create("d:\\bookserialization.xml");
            XmlSerializer serializaer = new XmlSerializer(typeof(book));
            serializaer.Serialize(writer, book1);
            writer.Close();
           

            //反序列化
            XmlSerializer serializer = new XmlSerializer(typeof(book));
            XmlReader reader=XmlReader.Create("d:\\bookserialization.xml");
            book tmp = (book)serializer.Deserialize(reader);
            reader.Close();
            Console.WriteLine(tmp.ToString());

执行结果

bookserialization.xml

<?xml version="1.0" encoding="utf-8"?>
<book xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" id="1">
  <name>十万个为什么</name>
  <price>55</price>
  <publisher>安童生聚乐部</publisher>
  <publishertime>2011年12月12日</publishertime>
</book>