让网站支持RSS订阅

添加一个页面，例如Rss.aspx，里面的代码除了下面一行以外都删掉：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Rss.aspx.cs" Inherits="MyNamespace.Rss" %>

Rss.aspx.cs代码实现：

using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.IO;
using System.Xml;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace MyNamespace
{
    public partial class Rss : System.Web.UI.Page
    {
        /// <summary>
        /// 输出XML格式数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
            if (IsPostBack) return;

            Response.Cache.SetNoStore();
            Response.ContentType = "application/xml";

            Response.Write(GetRSSOutput());
            Response.End();
        }

        /// <summary>
        /// 生成RSS内容
        /// </summary>
        /// <returns></returns>
        private string GetRSSOutput()
        {
            using (MemoryStream ms = new MemoryStream())
            {
                using (XmlTextWriter xmlTW = new XmlTextWriter(ms, Encoding.UTF8))
                {
                    xmlTW.Formatting = Formatting.Indented;
                    xmlTW.WriteStartDocument();
                    xmlTW.WriteStartElement("rss");
                    xmlTW.WriteAttributeString("version", "2.0");
                    xmlTW.WriteStartElement("channel");

                    xmlTW.WriteElementString("title", "欢迎订阅 XXX网 - XXX频道 RSS");
                    xmlTW.WriteElementString("link", "http://www.xxxx.com/");
                    xmlTW.WriteElementString("description", "xxxx的描述");

                    // ---!!此处从你的Business Logic或数据处理层读取数据，输出给RSS---------------
                    // -- !!注意改成你自己的数据实体，List＜你的实体＞或DataSet，DataTable等-----
                    IList<MyEntityItem> list = BLL.EntityProvider.GetEntitiesList();

                    foreach (MyEntityItem var in list)
                    {
                        xmlTW.WriteStartElement("item");
                        
                        //----文章的标题-----
                        xmlTW.WriteElementString("title", var.Title);

                        //----文章的URL-----
                        xmlTW.WriteElementString("link", "http://www.xxx.com/yyy.aspx?id=" + var.ID.ToString());

                         //----文章发布时间----- 
                        xmlTW.WriteElementString("pubDate", string.Format("{0:R}", var.PostAt));

                         //----文章的作者-----
                        xmlTW.WriteElementString("author", var.AuthorName);

                         //----文章的描述-----
                        // --- 可以带<a href="xxx">yyy</a>, 如果多行，可以带" <br/>"
                        xmlTW.WriteElementString("description", var.Desc);

                        xmlTW.WriteEndElement();
                    }

                    xmlTW.WriteEndElement();
                    xmlTW.WriteEndElement();
                    xmlTW.WriteEndDocument();
                    xmlTW.Flush();

                    byte[] buffer = ms.ToArray();
                    return Encoding.UTF8.GetString(buffer);
                }
            }
        }
    }
}

完成以后在IE里面输入该页面的URL可以看到RSS输出。

(以上就是全部代码了，把MyNamespace改成你的namespace，把数据层对象改成你自己的就可以了！)