XSLT 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 publicstaticclass 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 publicstaticbool 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 returntrue;
26                 }
27             }
28 returnfalse;
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 publicclass Genre
13     {
14 ///<summary>
15 /// 音乐类型Id
16 ///</summary>
17 publicint? GenreId { get; set; }
18 
19 ///<summary>
20 /// 音乐类型名称
21 ///</summary>
22 publicstring Name { get; set; }
23 
24 ///<summary>
25 /// 音乐类型描述
26 ///</summary>
27 publicstring 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 publicclass 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 publicoverride Genre Fill(IDataReader dataReader)
32         {
33             Model.GenreId = dataReader["GenreId"] asint?; // 音乐类型Id
34             Model.Name = dataReader["Name"] asstring; // 音乐类型名称
35             Model.Description = dataReader["Description"] asstring; // 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 publicabstractclass 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 publicabstract 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 publicclass 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 returnnull;
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 publicclass 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 publicclass Default : IHttpHandler
16     {
17 
18 publicvoid 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 publicbool IsReusable
42         {
43 get
44             {
45 returnfalse;
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>

posted @ 2011-09-20 13:46 Baocang 阅读(685) 评论(0) 编辑收藏举报

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XSLT 入门－－实际应用

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