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();
                    }