Web 2.0时代RSS的.Net实现
发布时间：2013-09-19 11:33:46来源：阅读（1251）
Web2.0时是以Blog，Wike，Tag，RSS等技术为代表的以个性化为中心的新一代互联网模式，RSS比起Blog等名词似乎还不算太热。但打开网页仍是遍布了RSS,Xml等醒目的图标，打开页面Mathon浏览器也是一个劲的提示有新的RSS连接，前一段一个项
目需要，自己写了一个.Net下面生成RSS信息的类，如下：
1using System;
2using System.Xml;
3using System.Collections;
4using System.Globalization;
5using System.Web;
6
7namespace BLRL
8{
9 ///
10 /// Summary description for Rss.
11 ///
12 public class Rss
13 {
14 const string dublinCoreNamespaceUri = @"http://purl.org/dc/elements/1.1/";
15 const string slashNamespaceUri = @"http://purl.org/rss/1.0/modules/slash/";
16 const string syndicationNamespaceUri = @"http://purl.org/rss/1.0/modules/syndication/";
17 //RSS频道结构
18 struct RssChannel
19 {
20 public string title;//标题
21 public string link;//连接
22 public string language;//语言
23 public string description;//描述
24 public string webMaster;//发布者
25 }
26
27 //RSS图片信息
28 struct RssImage
29 {
30 public string url;//地址
31 public string title;//标题
32 public int height ;//高度
33 public int width;//长度
34 }
35
36 //RSS项结构
37 struct RssItem
38 {
39 public string title;//标题
40 public string catalog;//类别
41 public string link;//连接
42 public DateTime pubDate;//发布日期
43 public string description;//描述
44
45 }
46 public Rss()
47 {
48 //
49 // TODO: Add constructor logic here
50 //
51 }
52 ///
53 ///添加rss版本信息
54 ///
55 ///
56 ///
57 public static XmlDocument AddRssPreamble( XmlDocument xmlDocument)
58 {
59 //声明创建1.0版本得xml
60 XmlDeclaration xmlDeclaration = xmlDocument.CreateXmlDeclaration("1.0", "utf-8", null);
61 xmlDocument.InsertBefore(xmlDeclaration, xmlDocument.DocumentElement);
62
63 XmlElement rssElement = xmlDocument.CreateElement("rss");
64
65 XmlAttribute rssVersionAttribute = xmlDocument.CreateAttribute("version");
66 rssVersionAttribute.InnerText = "2.0";
67 rssElement.Attributes.Append(rssVersionAttribute);
68 xmlDocument.AppendChild(rssElement);
69
70
71 XmlAttribute dublicCoreNamespaceUriAttribute = xmlDocument.CreateAttribute("xmlns:dc");
72 dublicCoreNamespaceUriAttribute.InnerText = dublinCoreNamespaceUri;
73 rssElement.Attributes.Append(dublicCoreNamespaceUriAttribute);
74
75 XmlAttribute slashNamespaceUriAttribute = xmlDocument.CreateAttribute("xmlns:slash");
76 slashNamespaceUriAttribute.InnerText = slashNamespaceUri;
77 rssElement.Attributes.Append(slashNamespaceUriAttribute);
78
79 XmlAttribute syndicationNamespaceUriAttribute = xmlDocument.CreateAttribute("xmlns:sy");
80 syndicationNamespaceUriAttribute.InnerText = syndicationNamespaceUri;
81 rssElement.Attributes.Append(syndicationNamespaceUriAttribute);
82
83
84 return xmlDocument;
85 }
86
87 ///
88 /// 添加频道
89 ///
90 ///
91 ///
92 ///
93 private static XmlDocument AddRssChannel( XmlDocument xmlDocument, RssChannel channel)
94 {
95 XmlElement channelElement = xmlDocument.CreateElement("channel");
96 XmlNode rssElement = xmlDocument.SelectSingleNode("rss");
97
98 rssElement.AppendChild(channelElement);
99
100 //添加标题
101 XmlElement channelTitleElement = xmlDocument.CreateElement("title");
102 channelTitleElement.InnerText = channel.title;
103 channelElement.AppendChild(channelTitleElement);
104
105 //添加连接
106 XmlElement channelLinkElement = xmlDocument.CreateElement("link");
107 channelLinkElement.InnerText = channel.link;
108 channelElement.AppendChild(channelLinkElement);
109
110 //添加描述
111 XmlElement channelDescriptionElement = xmlDocument.CreateElement("description");
112 XmlCDataSection cDataDescriptionSection = xmlDocument.CreateCDataSection(channel.description);
113 channelDescriptionElement.AppendChild(cDataDescriptionSection);
114 channelElement.AppendChild(channelDescriptionElement);
115
116 //添加语言
117 XmlElement languageElement = xmlDocument.CreateElement("language");
118 languageElement.InnerText = channel.language;
119 channelElement.AppendChild(languageElement);
120
121 //添加发布者
122 XmlElement webMasterElement = xmlDocument.CreateElement("webMaster");
123 webMasterElement.InnerText = channel.webMaster;
124 channelElement.AppendChild(webMasterElement);
125
126 return xmlDocument;
127 }
128
129
130 //添加RssImage
131 private static XmlDocument AddRssImage(XmlDocument xmlDocument, RssImage img)
132 {
133 XmlElement imgElement = xmlDocument.CreateElement("image");
134 XmlNode channelElement = xmlDocument.SelectSingleNode("rss/channel");
135
136 //创建标题
137 XmlElement imageTitleElement = xmlDocument.CreateElement("title");
138 imageTitleElement.InnerText = img.title;
139 imgElement.AppendChild(imageTitleElement);
140
141 //创建地址
142 XmlElement imageUrlElement = xmlDocument.CreateElement("url");
143 imageUrlElement.InnerText = img.url;
144 imgElement.AppendChild(imageUrlElement);
145
146 //创建高度
147 XmlElement imageHeightElement = xmlDocument.CreateElement("height");
148 imageHeightElement.InnerText = img.height.ToString();
149 imgElement.AppendChild(imageHeightElement);
150
151 //创建长度
152 XmlElement imageWidthElement = xmlDocument.CreateElement("width");
153 imageWidthElement.InnerText = img.width.ToString();
154 imgElement.AppendChild(imageWidthElement);
155
156 //将图像节点添加到频道节点里面
157 channelElement.AppendChild(imgElement);
158 return xmlDocument;
159
160 }
161
