C#中解析Rss实现思路及通用类--源代码

技术2022-05-11 55

Rss是 Web 2.0 时代的主要特征，那么有没有一种通用的方法来解析Rss呢？

当然有了，呵呵。下面给出了一种思路，仅供参考！

主要用到了几个类文件：

Channel.cs 、ChannelCollection.cs 、 Feed.cs 、 Item.cs 、 ItemCollection.cs

下面给出各个类的源文件：

1、Channel.cs 类

using System; namespace Utility.Rss { /// <summary> /// channel /// </summary> [Serializable()] public class Channel { private string _title; private string _link; private string _description; private ItemCollection items = new ItemCollection(); 属性 public Channel(){} }//} //

2、ChannelCollection.cs 类

using System; namespace Utility.Rss { /// <summary> /// rssChannelCollection 的摘要说明。 /// </summary> public class ChannelCollection : System.Collections.CollectionBase { public Channel this[int index] { get { return ((Channel)(List[index])); } set { List[index] = value; } } public int Add(Channel item) { return List.Add(item); } public ChannelCollection() { } }//} //

3、Feed.cs类

using System; using System.Xml; using System.IO; using System.Net; using System.Text; namespace Utility.Rss { /// <summary> /// rssFeed 的摘要说明。 /// </summary> public class Feed { private string _url; private System.DateTime _lastModified; private System.DateTime _lastRssDate; private Channel channel = new Channel(); 公共属性 public Feed() { } public Feed(string url,System.DateTime dt) { this._url=url; this._lastRssDate=dt; } public void Read() { XmlDocument xDoc=new XmlDocument(); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(_url); request.Timeout=15000; request.UserAgent=@"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.40607; .NET CLR 1.1.4322)"; Stream stream; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); this._lastModified = response.LastModified; stream = response.GetResponseStream(); StreamReader sr; //System.Xml.XmlReader = new XmlReader(); //stream=Encoding.Convert(Encoding.GetEncoding("GBK"),Encoding.GetEncoding("gb2312"),Convert.ToSByte(stream)); if(this.Get_CH(response.Headers["Content-Type"].ToString())=="GBK") { sr= new StreamReader(stream,System.Text.Encoding.GetEncoding("GB2312")); xDoc.Load(sr); } else {// sr= new StreamReader(stream,System.Text.Encoding.UTF8); xDoc.Load(stream); } if(this._lastRssDate<this._lastModified) { XmlNodeList xnList=xDoc.DocumentElement["channel"].SelectNodes("item"); // XmlNodeList xnList=xDoc.SelectNodes("items"); int a= xnList.Count; foreach(XmlNode xNode in xnList) { Item rt=new Item(); rt.title=xNode.SelectSingleNode("title").InnerText.Replace("'","''"); rt.link=xNode.SelectSingleNode("link").InnerText.Replace("'","''"); rt.description=xNode.SelectSingleNode("description").InnerText.Replace("'","''"); try { rt.pubDate=xNode.SelectSingleNode("pubDate").InnerText; } catch { rt.pubDate=this._lastModified.ToString(); } channel.Items.Add(rt); } } } public string Create() { return ""; } private string Get_CH(string s) { int l=s.IndexOf("charset=")+8; return s.Substring(l,s.Length-l); } }//} //

4、Item.cs类

using System; namespace Utility.Rss { /// <summary> /// rssItem 的摘要说明。 /// </summary> public class Item { private string _title; private string _link; private string _description; private string _pubDate; 属性 public Item(){} private string C_Date(string input) { System.DateTime dt; try { dt=Convert.ToDateTime(input); } catch { dt=System.DateTime.Now; } return dt.ToString(); } }//} //

5、ItemCollection.cs类

using System; namespace Utility.Rss { /// <summary> /// rssChannelCollection 的摘要说明。 /// </summary> public class ItemCollection : System.Collections.CollectionBase { public Item this[int index] { get { return ((Item)(List[index])); } set { List[index] = value; } } public int Add(Item item) { return List.Add(item); } public ItemCollection() { } }//} //

注：

应用实例请参考这里

仅供参考，欢迎交换意见：Com.LXJ@163.com

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