前段时间在写RSS Feed。
  经过了几次的修改，把相关的代码写成了单独的类。
  感觉重用时还算比较方便的。于是贴出来，大家一起研究研究。 /?"
  
  以下是RssBase.cs类：
  
  
  
   1using System;
   2using System.Collections.Generic;
   3using System.XML;
   4
   5namespace MyMedia.Utilities
   6{
   7 public class RssBase
   8 {
   9 RssBase constructor#region RssBase constructor
   10 public RssBase(XMLTextWriter rssWriter)
   11 {
   12 this.rssWriter = rssWriter;
   13 }
   14 public RssBase(XmlTextWriter rssWriter, bool hasMedia, IList<ItemInfo> items)
   15 {
   16 this.rssWriter = rssWriter;
   17 this.hasMedia = hasMedia;
   18 this.items = items;
   19 }
   20 #endregion
   21
   22 [Serializable]
   23 public sealed class ItemInfo
   24 {
   25 ItemInfo constructor#region ItemInfo constructor
   26 public ItemInfo() { }
   27 public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor, string itemGuid)
   28 {
   29 this.itemTitle = itemTitle;
   30 this.itemLink = itemLink;
   31 this.itemDescription = itemDescription;
   32 this.itemAuthor = itemAuthor;
   33 this.itemGuid = itemGuid;
   34 this.itemPubDate = itemPubDate;
   35 }
   36 public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor,
   37 string itemGuid, string mediaContentUrl, string mediaTitle, string mediaDescription,
   38 string mediaThumbUrl, string mediaThumbWidth, string mediaThumbHeight, string mediaAuthor)
   39 {
   40 this.itemTitle = itemTitle;
   41 this.itemLink = itemLink;
   42 this.itemDescription = itemDescription;
   43 this.itemPubDate = itemPubDate;
   44 this.itemAuthor = itemAuthor;
   45 this.itemGuid = itemGuid;
   46 this.mediaContentUrl = mediaContentUrl;
   47 this.mediaTitle = mediaTitle;
   48 this.mediaDescription = mediaDescription;
   49 this.mediaThumbUrl = mediaThumbUrl;
   50 this.mediaThumbWidth = mediaThumbWidth;
   51 this.mediaThumbHeight = mediaThumbHeight;
   52 this.mediaAuthor = mediaAuthor;
   53 }
   54 #endregion
   55
   56 Internal item variables#region Internal item variables
   57 // Item variables
   58 private string itemTitle;
   59 private string itemLink;
   60 private string itemDescription;
   61 private string itemPubDate = DateTime.Now.ToString("r");
   62 private string itemDateTaken = DateTime.Now.ToString();
   63 private string itemAuthor;
   64 private string itemGuid;
   65 // Media variables
   66 private string mediaContentUrl;
   67 private string mediaTitle;
   68 private string mediaDescription;
   69 private string mediaThumbUrl;
   70 private string mediaThumbWidth;
   71 private string mediaThumbHeight;
   72 private string mediaAuthor;
   73 #endregion
   74
   75 Item properties#region Item properties
   76 public string ItemTitle
   77 {
   78 set { itemTitle = value; }
   79 get { return itemTitle; }
   80 }
   81 public string ItemLink
   82 {
   83 set { itemLink = value; }
   84 get { return itemLink; }
   85 }
   86 public string ItemDescription
   87 {
   88 set { itemDescription = value; }
   89 get { return itemDescription; }
   90 }
   91 public string ItemPubDate
   92 {
   93 set { itemPubDate = value; }
   94 get { return itemPubDate; }
   95 }
   96 public string ItemDateTaken
   97 {
   98 set { itemDateTaken = value; }
   99 get { return itemDateTaken; }
  100 }
  101 public string ItemAuthor
  102 {
  103 set { itemAuthor = value; }
  104 get { return itemAuthor; }
  105 }
  106 public string ItemGuid
  107 {
  108 set { itemGuid = value; }
  109 get { return itemGuid; }
  110 }
  111 public string MediaContentUrl
  112 {
  113 set { mediaContentUrl = value; }
  114 get { return mediaContentUrl; }
  115 }
  116 public string MediaTitle
  117 {
  118 set { mediaTitle = value; }
  119 get { return mediaTitle; }
  120 }
  121 public string MediaDescription
  122 {
  123 set { mediaDescription = value; }
  124 get { return mediaDescription; }
  125 }
  126 public string MediaThumbUrl
  127 {
  128 set { mediaThumbUrl = value; }
  129 get { return mediaThumbUrl; }
  130 }
  131 public string MediaThumbWidth
  132 {
  133 set { mediaThumbWidth = value; }
  134 get { return mediaThumbWidth; }
  135 }
  136 public string MediaThumbHeight
  137 {
  138 set { mediaThumbHeight = value; }
  139 get { return mediaThumbHeight; }
  140 }
  141 public string MediaAuthor
  142 {
  143 set { mediaAuthor = value; }
  144 get { return mediaAuthor; }
  145 }
  146 #endregion
  147
  148 }
  149
  150 Const string#region Const string
  151 private const string TITLE = "MyMedia RSS";
  152 private const string XMLNS_MEDIA = "http://www.MyWii.com.au";
  153 private const string XMLNS_DC = "http://purl.org/dc/elements/1.1/";
  154 private const string LINK = "http://www.MyWii.com.au/";
  155 private const string DESCRIPTION = "description";
  156 private const string LANGUAGE = "en-us";
  157 private const string COPYRIGHT = "Copyright 2006";
  158 private const string GENERATOR = "MyMedia RSS Generator";
  159 private const string IMAGE_URL = "http://www.MyWii.com.au/img/main/feed.gif";
  160 private const string IMAGE_TITLE = "MyWii";
  161 private const string IMAGE_LINK = "http://www.MyWii.com.au";
  162 private string PUB_DATE = DateTime.Now.ToString("r");
  163 private string LAST_BUILD_DATE = DateTime.Now.ToString("r");
  164
  165 #endregion
  166
  167 Internal member variables#region Internal member variables
  168 private XMLTextWriter rssWriter;
  169 private bool hasMedia;
  170 private IList<ItemInfo> items;
  171 #endregion
  172
  173 Properties#region Properties
  174 public XMLTextWriter RssWriter
  175 {
  176 set { rssWriter = value; }
  177 get { return rssWriter; }
  178 }
  179 public bool HasMedia
  180 {
  181 set { hasMedia = value; }
  182 get { return hasMedia; }
  183 }
  184 public IList<ItemInfo> Items
  185 {
  186 set { items = value; }
  187 get { return items; }
  188 }
  189
  190 #endregion
  191
  192 Private method#region Private method
  193
  194 private void WritePrologue()
  195 {
  196 rssWriter.WriteStartDocument();
  197 rssWriter.WriteStartElement("rss");
  198 rssWriter.WriteAttributeString("version", "2.0");
  199 rssWriter.WriteAttributeString("XMLns:media", XMLNS_MEDIA);
  200 rssWriter.WriteAttributeString("XMLns:dc", XMLNS_DC);
  201 rssWriter.WriteString("\n ");
  202 // Write in channel block
  203 rssWriter.WriteStartElement("channel");
  204 rssWriter.WriteString("\n ");
  205 rssWriter.WriteElementString("title", TITLE);
  206 rssWriter.WriteString("\n ");
  207 rssWriter.WriteElementString("link", LINK);
  208 rssWriter.WriteString("\n ");
  209 rssWriter.WriteElementString("description", DESCRIPTION);
  210 rssWriter.WriteString("\n ");
  211 rssWriter.WriteElementString("pubDate", PUB_DATE);
  212 rssWriter.WriteString("\n ");
  213 rssWriter.WriteElementString("lastBuildDate", LAST_BUILD_DATE);
  214 rssWriter.WriteString("\n ");
  215 rssWriter.WriteElementString("language", LANGUAGE);
  216 rssWriter.WriteString("\n ");
  217 rssWriter.WriteElementString("copyright", COPYRIGHT);
  218 rssWriter.WriteString("\n ");
  219 rssWriter.WriteElementString("generator", GENERATOR);
  220 rssWriter.WriteString("\n ");
  221 // Write in image block
  222 rssWriter.WriteStartElement("image");
  223 rssWriter.WriteString("\n ");
  224 rssWriter.WriteElementString("url", IMAGE_URL);
  225 rssWriter.WriteString("\n ");
  226 rssWriter.WriteElementString("title", IMAGE_TITLE);
  227 rssWriter.WriteString("\n ");
  228 rssWriter.WriteElementString("link", IMAGE_LINK);
  229 rssWriter.WriteString("\n ");
  230 rssWriter.WriteEndElement();
  231 rssWriter.WriteString("\n ");
  232 }
  
  
  
  
    ()。