Web 2.0時代RSS的.Net實現

2019-11-18 17:09:48

字體：大中小

來源：轉載

供稿：網友

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：

1using System;
2using System.Xml;
3using System.Collections;
4using System.Globalization;
5using System.Web;
6
7namespace BLRL
8{
9    /// <summary>
10    /// Summary description for Rss.
11    /// </summary>
12    public class Rss
13    {
14        const string dublinCoreNamespaceUri = @" 15        const string slashNamespaceUri = @" 16        const string syndicationNamespaceUri = @" 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 RssImage
29        {
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 here
50            //
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 AddRss PReamble( XmlDocument xmlDocument)
58        {
59            //聲明創建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        /// <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            //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">調用下RSS文件，馬桶等軟件就會自動提示有RRS信息了