Web 2.0時代RSS的.Net實現
Web2.0時是以Blog，Wike，Tag，RSS等技術為代表的以個性化為中心的新一代互聯網模式，RSS比起Blog等名詞似乎還不算太熱。但打開網頁仍是遍布了RSS,Xml等醒目的圖標，打開頁面Mathon瀏覽器也是一個勁的提示有新的RSS連接，前一段一個項
目需要，自己寫了一個.Net下面生成RSS信息的類，如下：
1
using System;2
using System.Xml;3
using System.Collections;4
using System.Globalization;5
using System.Web;6
7
namespace BLRL8
{9
/// <summary>10
/// Summary description for Rss.11
/// </summary>12
public class Rss13
{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頻道結構18
struct RssChannel 19
{20
public string title;//標題21
public string link;//連接22
public string language;//語言 23
public string description;//描述24
public string webMaster;//發布者25
}26
27
//RSS圖片信息28
struct RssImage29
{30
public string url;//地址31
public string title;//標題32
public int height ;//高度33
public int width;//長度34
}35
36
//RSS項結構37
struct RssItem 38
{39
public string title;//標題40
public string catalog;//類別41
public string link;//連接42
public DateTime pubDate;//發布日期43
public string description;//描述44
45
}46
public Rss()47
{48
//49
// TODO: Add constructor logic here50
//51
}52
/// <summary>53
///添加rss版本信息54
/// </summary>55
/// <param name="xmlDocument"></param>56
/// <returns></returns>57
public static XmlDocument AddRssPreamble( XmlDocument xmlDocument)58
{59
//聲明創建1.0版本得xml60
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
/// <summary>88
/// 添加頻道89
/// </summary>90
/// <param name="xmlDocument"></param>91
/// <param name="channel"></param>92
/// <returns></returns>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
//添加標題101
XmlElement channelTitleElement = xmlDocument.CreateElement("title");102
channelTitleElement.InnerText = channel.title;103
channelElement.AppendChild(channelTitleElement);104
105
//添加連接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
//添加語言117
XmlElement languageElement = xmlDocument.CreateElement("language");118
languageElement.InnerText = channel.language;119
channelElement.AppendChild(languageElement);120
121
//添加發布者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RssImage131
private static XmlDocument AddRssImage(XmlDocument xmlDocument, RssImage img) 132
{133
XmlElement imgElement = xmlDocument.CreateElement("image");134
XmlNode channelElement = xmlDocument.SelectSingleNode("rss/channel"); 135
136
//創建標題137
XmlElement imageTitleElement = xmlDocument.CreateElement("title");138
imageTitleElement.InnerText = img.title;139
imgElement.AppendChild(imageTitleElement);140
141
//創建地址142
XmlElement imageUrlElement = xmlDocument.CreateElement("url");143
imageUrlElement.InnerText = img.url;144
imgElement.AppendChild(imageUrlElement);145
146
//創建高度147
XmlElement imageHeightElement = xmlDocument.CreateElement("height");148
imageHeightElement.InnerText = img.height.ToString();149
imgElement.AppendChild(imageHeightElement);150
151
//創建長度152
XmlElement imageWidthElement = xmlDocument.CreateElement("width");153
imageWidthElement.InnerText = img.width.ToString();154
imgElement.AppendChild(imageWidthElement);155
156
//將圖像節點添加到頻道節點里面157
channelElement.AppendChild(imgElement);158
return xmlDocument;159
160
}161
162
163
/// <summary>164
/// 添加項信息165
/// </summary>166
/// <param name="xmlDocument"></param>167
/// <param name="item"></param>168
/// <returns></returns>169
private static XmlDocument AddRssItem (XmlDocument xmlDocument, RssItem item) 170
{171
XmlElement itemElement = xmlDocument.CreateElement("item");172
XmlNode channelElement = xmlDocument.SelectSingleNode("rss/channel");173
174
//創建標題175
XmlElement itemTitleElement = xmlDocument.CreateElement("title"); 176
XmlCDataSection cDataTitleSection = xmlDocument.CreateCDataSection(item.title);177
itemTitleElement.AppendChild(cDataTitleSection); 178
itemElement.AppendChild(itemTitleElement);179
180
//創建日期181
XmlElement pubDateElement = xmlDocument.CreateElement("pubDate");182
pubDateElement.InnerText = XmlConvert.ToString(item.pubDate.ToUniversalTime(), "yyyy-MM-ddTHH:mm:ss");183
itemElement.AppendChild(pubDateElement);184
185
//添加連接186
XmlElement itemLinkElement = xmlDocument.CreateElement("link");187
itemLinkElement.InnerText = item.link;188
itemElement.AppendChild(itemLinkElement);189
190
//創建描述191
XmlElement itemDescriptionElement = xmlDocument.CreateElement("description");192
XmlCDataSection cDataDescriptionSection = xmlDocument.CreateCDataSection(item.description); 193
itemDescriptionElement.AppendChild(cDataDescriptionSection);194
itemElement.AppendChild(itemDescriptionElement);195
196
197
//創建類型198
XmlElement itemcatalogElement = xmlDocument.CreateElement("catalog");199
itemcatalogElement.InnerText = item.catalog;200
itemElement.AppendChild(itemcatalogElement);201
202
//將RssItem添加到頻道節點里面203
channelElement.AppendChild(itemElement);204
205
return xmlDocument;206
}207
}208
}根據特定的需要，可以先將數據讀取到列表里面，然后遍歷列表，調用上述方法，生成Xml字符串。
這個字符串就是RS用到XML字符串了。也可以入aspx文件，然后用
<link type="application/rss+xml" rel="alternate" href="rssfeed.aspx">
作者：jillzhang
出處：http://jillzhang.cnblogs.com/
本文版權歸作者和博客園共有，歡迎轉載，但未經作者同意必須保留此段聲明，且在文章頁面明顯位置給出原文連接，否則保留追究法律責任的權利。
出處：http://jillzhang.cnblogs.com/
本文版權歸作者和博客園共有，歡迎轉載，但未經作者同意必須保留此段聲明，且在文章頁面明顯位置給出原文連接，否則保留追究法律責任的權利。
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