读取RSS（支持目前所有RSS版本）

using System;


using System.Collections.Generic;


using System.Net;


using System.IO;


using System.Xml;


using System.Xml.XPath;




public class RssDoc




...{


XmlDocument doc;


List<Hashtable> list;




public RssDoc()




...{


}




public RssDoc(XmlDocument doc)




...{


this.doc = doc;


Load();


}






/**//// <summary>


/// 获取网络资源


/// </summary>


/// <param name="url">url</param>


/// <param name="timeOut">timeout（单位秒）</param>


/// <param name="useProxy">是否用代理</param>


public static XmlDocument GetDoc(string url, int timeOut, bool useProxy)




...{


XmlDocument _doc = new XmlDocument();


try




...{


WebRequest req = WebRequest.Create(url);


if (useProxy)




...{


WebProxy proxy = new WebProxy("http://63.149.98.16:80/", true);


req.Proxy = proxy;


}


req.Timeout = timeOut * 1000;


WebResponse res = req.GetResponse();


Stream rssStream = res.GetResponseStream();


_doc.Load(rssStream);


rssStream.Dispose();


res.Close();


}


catch




...{


_doc = null;


}


return _doc;


}




private void Load()




...{


list = new List<Hashtable>();




XmlNodeList nodes = doc.GetElementsByTagName("item");


if (nodes==null||nodes.Count == 0)


nodes = doc.GetElementsByTagName("entry");


if (nodes == null || nodes.Count == 0)


return;




Hashtable ht;


XmlNodeList ns;


string name;


string date;


foreach (XmlNode node in nodes)




...{


ht = new Hashtable();


ns = node.ChildNodes;


try




...{


foreach (XmlNode n in ns)




...{


name = n.Name.ToLower();


if (name.Contains("link"))




...{


if (n.Attributes["href"] != null)


ht["link"] = n.Attributes["href"].Value.Trim();


else ht["link"] = n.InnerText.Trim();


continue;


}


if (name.Contains("title"))




...{


ht["title"] = n.InnerText.Trim();


continue;


}


if (name.Contains("category"))




...{


if (ht["category"] == null) ht["category"] = n.InnerText.Trim();


else ht["category"] = ht["category"].ToString() + "," + n.InnerText.Trim();


continue;


}


if (name.Contains("date"))




...{


date = n.InnerText;


if (date != "")




...{


if (date.Contains(",")) date = date.Substring(date.IndexOf(",") + 1);


date = date.Trim();


if (date.Split(' ').Length > 4) date = date.Replace(date.Split(' ')[4], "");


if (date.Contains(".")) date = date.Split('.')[0].Trim();


date = date.Replace("T", " ");


if (date.Substring(date.LastIndexOf(":") + 1).Length > 2)


date = date.Substring(0, date.LastIndexOf(":") + 3);




try ...{ date = DateTime.Parse(date.Trim()).ToString(); }




catch ...{ date = DateTime.Now.ToString(); }


}


else date = DateTime.Now.ToString();


ht["pubdate"] = date;


continue;


}


if (name.Contains("description"))




...{


ht["description"] = n.InnerText.Trim();


continue;


}


if (name.Contains("content"))




...{


ht["description"] = n.InnerText.Trim();


continue;


}


if (name.Contains("summary"))




...{


if (ht["description"] == null) ht["description"] = n.InnerText.Trim();


}


}


}


catch




...{


continue;


}


if (ht["link"] == null) ht["link"] = "";


if (ht["title"] == null || ht["title"].ToString() == "") ht["title"] = ht["link"].ToString();


if (ht["category"] == null) ht["category"] = "";


if (ht["pubdate"] == null) ht["pubdate"] = DateTime.Now.ToString();


if (ht["description"] == null) ht["description"] = "";




list.Add(ht);


}


}




public List<Hashtable> Items




...{


get




...{


return list;


}


}




}



使用：


XmlDocument doc = RssDoc.GetDoc(url, 3, false);




RssDoc rssdoc = new RssDoc(doc);




string title = "";


string link = "";


string description = "";


string cate = "";


string time = "";




foreach (Hashtable hs in rssdoc.Items)




...{


description = hs["description"].ToString();




title = hs["title"].ToString();


link = hs["link"].ToString();




time = hs["pubdate"].ToString();


cate = hs["category"].ToString();


}