C#中解析Rss实现思路及通用类--源代码

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#region 属性
       /**////<summary>
       /// 标题
       /// </summary>
       public string title
       ...{
           get...{return _title;}
           set...{_title= value.ToString();}
        }
       /**////<summary>
       /// 链接
       /// </summary>
       public string link
       ...{
           get...{return _link;}
           set...{_link= value.ToString();}
        }
       /**////<summary>
       /// 描述
       /// </summary>
       public string description
       ...{
           get...{return _description;}
           set...{_description= value.ToString();}
        }
       public ItemCollection Items
       ...{
           get ...{return items; }
        }
       #endregion

       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 Channelthis[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#region 公共属性
       public string url
       ...{
           get...{return _url;}
           set...{_url=value;}
        }
       public System.DateTime lastModified
       ...{
           get...{return _lastModified;}
        }
       public System.DateTime lstRssDate
       ...{
           set...{_lastRssDate=value;}
        }
       public Channel Channel
       ...{
           get ...{return channel; }
        }       
       #endregion


       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 xNodein 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#region 属性

       /**////<summary>
       /// 标题
       /// </summary>
       public string title
       ...{
           get...{return _title;}
           set...{_title=value.ToString();}
        }
       /**////<summary>
       /// 链接
       /// </summary>
       public string link
       ...{
           get...{return _link;}
           set...{_link=value.ToString();}
        }
       /**////<summary>
       /// 描述
       /// </summary>
       public string description
       ...{
           get...{return _description;}
           set...{_description=value.ToString();}
        }
       /**////<summary>
       /// 频道内容发布日期
       /// </summary>
       public string pubDate
       ...{
           get...{return _pubDate;}
           set...{_pubDate=C_Date(value);}
        }

       #endregion

       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 ：[e-mail]

 

http://blog.csdn.net/lxjhb/article/details/1516172