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1.在线生成RSS聚合页。

(1)创建Rss.aspx
<%@ Page language="c#" Codebehind="Rss.aspx.cs" AutoEventWireup="false" Inherits="LiTianPing.Rss" %>
只留下这一行，其余的都删掉。

(2)后台代码；Rss.aspx.cs

  private void Page_Load(object sender, System.EventArgs e)
  {    
   Response.ContentType="text/xml";
   Response.Write(GetRSS());
  }

  /// <summary>
  /// 取得聚合文章
  /// </summary>
  /// <returns></returns>
  public string GetRSS()
  {
   News t=new News();//自己的业务类
   DataSet ds=t.GetListByClass(1);//根据类别得到数据
   
   StringBuilder strCode=new StringBuilder();
   strCode.Append("<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\" ?>");
   strCode.Append("<rss version='2.0' xmlns:dc=\"http://purl.org/dc/elements/1.1/\"");
   strCode.Append(" xmlns:trackback=\"http://madskills.com/public/xml/rss/module/trackback/\" ");
   strCode.Append(" xmlns:wfw=\"http://wellformedweb.org/CommentAPI/\" xmlns:slash=\"http://purl.org/rss/1.0/modules/slash/\">");
   strCode.Append("<channel>");
   strCode.Append("<title>李天平RSSDemo</title>");
   strCode.Append("<link>http://"+Request.ServerVariables["SERVER_NAME"]+"</link> ");
   strCode.Append("<description>天道酬勤</description> ");  
   strCode.Append("<copyright>Copyright 2005</copyright> ");      
   
   foreach(DataRow row in ds.Tables[0].Rows)
   {
    string Id=row["Id"].ToString();
    string title=row["title"].ToString();
    string description=row["description"].ToString();
    string pubdate=row["pubdate"].ToString();
    string ClassId=row["ClassId"].ToString();
    //string author=row["author"].ToString();

    strCode.Append("<item>");
    strCode.Append("<title>"+title+"</title>");
    strCode.Append("<link>http://"+Request.ServerVariables["SERVER_NAME"]+"/NewsShow.aspx?ID="+Id+"</link>");
    strCode.Append("<subject>"+description+"</subject>");
    strCode.Append("<description><![CDATA["+description+"]]></description>");    
    strCode.Append("<PubDate>"+pubdate+"</PubDate>");
    strCode.Append("<category>"+ClassId+"</category>");
    strCode.Append("</item>");    
   }
   strCode.Append("</channel>");
   strCode.Append("</rss>");  
   return strCode.ToString();
  }

 (3) XmlTextWriter实现方式2；Rss.aspx.cs

  string xmlDoc="rss.xml"; 
 private void Page_Load(object sender, System.EventArgs e)
  {    
   xmlDoc=Server.MapPath(".")+xmlDoc;   
   GetRSS2();
   XmlDocument doc= new XmlDocument();
   doc.Load(xmlDoc);
   Response.ContentType = "text/xml";
   doc.Save(Response.Output);
  }
  /// <summary>
  /// 取得聚合文章
  /// </summary>
  /// <returns></returns>
  public void GetRSS2()
  {
   News t=new News();
   DataSet ds=t.GetListByClass(1);
   
   XmlTextWriter writer = new XmlTextWriter(xmlDoc,Encoding.UTF8);
   writer.Formatting = Formatting.Indented;
   writer.WriteStartDocument(true);
   writer.WriteComment("RSS页的实现");
   writer.WriteStartElement("rss");
   writer.WriteAttributeString("version","2.0");      
   writer.WriteStartElement("channel");   
   writer.WriteStartElement("title");
   writer.WriteString("李天平RSSDemo");
   writer.WriteEndElement();
   writer.WriteStartElement("link");   
   writer.WriteString("http://"+Request.ServerVariables["SERVER_NAME"]);
   writer.WriteEndElement();   
   writer.WriteStartElement("description");
   writer.WriteString("天道酬勤");
   writer.WriteEndElement();
   writer.WriteStartElement("copyright");
   writer.WriteString("Copyright 2005");
   writer.WriteEndElement();
   writer.WriteStartElement("language");
   writer.WriteString("zh-cn");
   writer.WriteEndElement();  
      
   foreach(DataRow row in ds.Tables[0].Rows)
   {
    string Id=row["Id"].ToString();
    string title=row["title"].ToString();
    string description=row["description"].ToString();
    string pubdate=row["pubdate"].ToString();
    string ClassId=row["ClassId"].ToString();
    //string author=row["author"].ToString();

    writer.WriteStartElement("item");
    writer.WriteStartElement("title");
    writer.WriteString(title);
    writer.WriteEndElement();
    writer.WriteStartElement("link");
    writer.WriteString("http://"+Request.ServerVariables["SERVER_NAME"]+"/NewsShow.aspx?ID="+Id) ;
    writer.WriteEndElement();
    writer.WriteStartElement("description");
    writer.WriteCData(description);
    writer.WriteEndElement();
    writer.WriteStartElement("pubDate");
    writer.WriteString(pubdate);
    writer.WriteEndElement();
    writer.WriteStartElement("category");
    writer.WriteString(ClassId);
    writer.WriteEndElement();
    writer.WriteEndElement();  
   }
   writer.WriteEndElement();
   writer.WriteEndElement();
   writer.Flush();
   writer.Close();
 
  }

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