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SLT 入门－－实际应用 
<add key="Spider" value="Googlebot|Baiduspider|Yahoo! Slurp|YodaoBot|msnbot"/>

把上面的代码加入web.config文件的appSettings节点中，别问为什么...

为Request写个扩展:

RequestExtension 
 1 namespace MusicStore.Utility

 2 {

 3  using System;

 4  using System.Configuration;

 5  using System.Web;

 6 

 7  /// <summary>

 8  /// HttpRequest扩展

 9  /// </summary>

10  public static class RequestExtension

11  {

12  /// <summary>

13  /// 是不是网络爬虫的请求

14  /// </summary>

15  /// <param name="request">HttpRequest的实例</param>

16  /// <returns>是不是网络爬虫的请求（True|False）</returns>

17  public static bool IsSpiderRequest(this HttpRequest request)

18  {

19  string userAgent = request.UserAgent.ToLower();

20  string[] spiders = ConfigurationManager.AppSettings["Spider"].ToLower().Split('|');

21  foreach (string spider in spiders)

22  {

23  if (userAgent.Contains(spider))

24  {

25  return true;

26  }

27  }

28  return false;

29  }

30  }

31 }

看下xml文件：

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

2 <?xml-stylesheet type="text/xsl" href="Genres.xslt"?>

3 <root />

XSLT文件：

Genres.xslt 
 1 <?xml version="1.0" encoding="utf-8"?>

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

 3  <xsl:output method="html" indent="yes" encoding="utf-8" doctype-public="-//W3C//DTD XHTML 1.1//EN" doctype-system="http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" omit-xml-declaration="yes"/>

 4  <xsl:variable name="genresPath">http://localhost:4557/List/Genres.ashx</xsl:variable>

 5  <xsl:variable name="genres" select="document($genresPath)/Genres" />

 6  <xsl:variable name="itemUrl">http://localhost:4557/Item/</xsl:variable>

 7  <xsl:template match="root">

 8  <html xmlns="http://www.w3.org/1999/xhtml" >

 9  <head>

10  <title>Demo</title>

11  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

12  </head>

13  <body>

14  <ul id="genres">

15  <xsl:for-each select="$genres/Genre">

16  <li>

17  <a>

18  <xsl:attribute name="href">

19  <xsl:value-of select="concat(concat($itemUrl,'Default.aspx?genreId='),GenreId)"/>

20  </xsl:attribute>

21  <xsl:attribute name="title">

22  <xsl:value-of select="Description"/>

23  </xsl:attribute>

24  <xsl:value-of select="Name"/>

25  </a>

26  </li>

27  </xsl:for-each>

28  </ul>

29  </body>

30  </html>

31  </xsl:template>

32 </xsl:stylesheet>

Genders.ashx文件内容：

Genres.ashx 
 1 namespace MusicStore.List

 2 {

 3  using System;

 4  using System.Collections.Generic;

 5  using System.Text;

 6  using System.Web;

 7  using System.Web.Services;

 8  using System.Xml.Serialization;

 9  using MusicStore.BLL;

10  using MusicStore.Models;

11 

12  /// <summary>

13  /// Genres 的摘要说明

14  /// </summary>

15  [WebService(Namespace = "http://tempuri.org/")]

16  [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

17  public class Genres : IHttpHandler

18  {

19  public void ProcessRequest(HttpContext context)

20  {

21  context.Response.ContentType = "text/xml";

22  context.Response.ContentEncoding = Encoding.UTF8;

23 

24  List<Genre> genres = new GenreBLL().GetAllGenres();

25  XmlSerializer serializer = new XmlSerializer(genres.GetType(), new XmlRootAttribute("Genres"));

26  serializer.Serialize(context.Response.OutputStream, genres);

27  }

28 

29  public bool IsReusable

30  {

31  get

32  {

33  return false;

34  }

35  }

36  }

37 }

实体类文件：

Gender.cs 
 1 namespace MusicStore.Models

 2 {

 3  using System;

 4  using System.Collections.Generic;

 5  using System.Xml;

 6  using System.Xml.Serialization;

 7 

 8  /// <summary>

 9  /// 音乐类型

10  /// </summary>

11  [Serializable]

12  public class Genre

13  {

14  /// <summary>

15  /// 音乐类型Id

16  /// </summary>

17  public int? GenreId { get; set; }

18 

19  /// <summary>

20  /// 音乐类型名称

21  /// </summary>

22  public string Name { get; set; }

23 

24  /// <summary>

25  /// 音乐类型描述

26  /// </summary>

27  public string Description { get; set; }

28  }

29 }

实体类适配器类：

GenreModelAdapter.cs 
 1 namespace MusicStore.Models.Adapters

 2 {

 3  using System;

 4  using System.Data;

 5 

 6  /// <summary>

 7  /// 音乐类型适配器

 8  /// </summary>

 9  public class GenreModelAdapter:ModelAdapterBase<Genre>

10  {

11  /// <summary>

12  /// 音乐类型适配器构造方法

13  /// </summary>

14  public GenreModelAdapter()

15  : base(null)

16  { }

17 

18  /// <summary>

19  /// 音乐类型适配器构造方法

20  /// </summary>

21  /// <param name="genre">音乐类型模型实例</param>

22  public GenreModelAdapter(Genre genre)

23  : base(genre)

24  { }

25 

26  /// <summary>

27  /// 填充音乐类型实体

28  /// </summary>

29  /// <param name="dataReader">数据读取器</param>

30  /// <returns>填充后的音乐类型实体</returns>

31  public override Genre Fill(IDataReader dataReader)

32  {

33  Model.GenreId = dataReader["GenreId"] as int?; // 音乐类型Id

34  Model.Name = dataReader["Name"] as string; // 音乐类型名称

35  Model.Description = dataReader["Description"] as string; // 音乐类型描述

36 

37  return Model;

38  }

39  }

40 }

实体适配器基类：

ModelAdapterBase.cs 
 1 namespace MusicStore.Models.Adapters

 2 {

 3  using System;

 4  using System.Data;

 5 

 6  /// <summary>

 7  /// 模型适配器基类

 8  /// </summary>

 9  public abstract class ModelAdapterBase<T> where T : class

10  {

11  /// <summary>

12  /// 模型适配器实体

13  /// </summary>

14  public T Model;

15 

16  /// <summary>

17  /// 模型适配器基类器构造方法

18  /// </summary>

19  /// <param name="model">模型实例</param>

20  public ModelAdapterBase(T model)

21  {

22  Model = model;

23  }

24 

25  /// <summary>

26  /// 填充实体

27  /// </summary>

28  /// <param name="dataReader">数据读取器</param>

29  /// <returns>填充后的实体</returns>

30  public abstract T Fill(IDataReader dataReader);

31  }

32 }

数据访问类：

GenreDAL.cs 
 1 namespace MusicStore.DAL

 2 {

 3  using System;

 4  using System.Collections.Generic;

 5  using System.Web;

 6  using MusicStore.Models;

 7  using MusicStore.Models.Adapters;

 8  using System.Data.SqlClient;

 9  using MusicStore.DAL.Utility;

10 

11  /// <summary>

12  /// 音乐类型数据访问类

13  /// </summary>

14  public class GenreDAL

15  {

16  /// <summary>

17  /// 获取所有音乐类型

18  /// </summary>

19  /// <returns>音乐类型实体列表</returns>

20  public List<Genre> GetAllGenres()

21  {

22  string storedProcedureName = "GetAllGenres";

23 

24  GenreModelAdapter genreAdapter = new GenreModelAdapter();

25  List<Genre> genres = new List<Genre>();

26 

27  SqlDataReader reader = SqlHelper.ExecuteReader(SqlHelper.musicStoreConnectionString, storedProcedureName, null);

28 

29  if (reader == null)

30  {

31  return null;

32  }

33 

34  while (reader.Read())

35  {

36  Genre genre = new Genre();

37  genreAdapter.Model = genre;

38  genreAdapter.Fill(reader);

39  genres.Add(genre);

40  }

41 

42  return genres;

43  }

44  }

45 }

业务类：

GenreBLL.cs 
 1 namespace MusicStore.BLL

 2 {

 3  using System;

 4  using System.Collections.Generic;

 5  using MusicStore.DAL;

 6  using MusicStore.Models;

 7 

 8  /// <summary>

 9  /// 音乐类型业务逻辑类

10  /// </summary>

11  public class GenreBLL

12  {

13  /// <summary>

14  /// 获取所有音乐类型

15  /// </summary>

16  /// <returns>音乐类型实体列表</returns>

17  public List<Genre> GetAllGenres()

18  {

19  GenreDAL genreDAL = new GenreDAL();

20  return genreDAL.GetAllGenres();

21  }

22  }

23 }


Default.ashx:

Default.ashx 
 1 namespace MusicStore.List

 2 {

 3  using System;

 4  using System.Web;

 5  using System.Web.Services;

 6  using System.Xml;

 7  using System.Xml.Xsl;

 8  using MusicStore.Utility;

 9 

10  /// <summary>

11  /// $codebehindclassname$ 的摘要说明

12  /// </summary>

13  [WebService(Namespace = "http://tempuri.org/")]

14  [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

15  public class Default : IHttpHandler

16  {

17 

18  public void ProcessRequest(HttpContext context)

19  {

20  string xmlFileName = "Genres.xml";

21  string xmlPath = context.Server.MapPath(xmlFileName);

22 

23  if (!context.Request.IsSpiderRequest())

24  {

25  context.Response.Redirect(xmlFileName);

26  return;

27  }

28 

29  string xslPath = context.Server.MapPath("Genres.xslt");

30 

31  XslCompiledTransform xslt = new XslCompiledTransform();

32 

33  XsltSettings xsltSettings = new XsltSettings();

34  xsltSettings.EnableDocumentFunction = true;

35  xsltSettings.EnableScript = true;// 转换时允许执行xslt中的脚本

36 

37  xslt.Load(xslPath, xsltSettings, new XmlUrlResolver());

38  xslt.Transform(xmlPath, null, context.Response.OutputStream);

39  }

40 

41  public bool IsReusable

42  {

43  get

44  {

45  return false;

46  }

47  }

48  }

49 }

别晕，看下解决方案：



运行结果：

浏览器请求返回的结果 
1 <?xml version="1.0" encoding="utf-8" ?>

2 <?xml-stylesheet type="text/xsl" href="/List/Genres.xslt"?>

3 <root />
爬虫请求返回的结果 
 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

 2 <html xmlns="http://www.w3.org/1999/xhtml">

 3  <head>

 4  <title>Demo</title>

 5  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

 6  </head>

 7  <body>

 8  <h1>Xslt Demo</h1>

 9  <ul id="genres">

10  <li>

11  <a href="http://localhost:4557/Item/Default.aspx?genreId=1" title="rock Description...">Rock</a>

12  </li>

13  <li>

14  <a href="http://localhost:4557/Item/Default.aspx?genreId=1" title="Jazz Description...">Jazz</a>

15  </li>

16  </ul>

17  </body>

18 </html>
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作者：Gezidan
出处：http://www.rixu.net　　　　
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
本文转载自 http://www.cnblogs.com/javennie/archive/2011/09/20/xslt.html
posted on 2011-09-28 10:27 日需博客 阅读(397) 评论(0)  编辑 收藏 引用 所属分类: C# 、技术文章 、转载

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