.NET生成Rss的xml文件

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
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;
using System.Xml.Linq;
using System.IO;
using System.Data.SqlClient;
using GeneralLibrary.DbAccess;
using System.Diagnostics;
 
 

public partial class RSS_CreateRss : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
     //   Stopwatch st = new Stopwatch();
     //   st.Start();
 
        string Tablename = "lrb"; //
        string fname = System.Web.HttpContext.Current.Server.MapPath("../rss.xml");
         WriteRss(fname, Tablename);
      //   st.Stop();
      //   string strUsetime = (st.ElapsedMilliseconds / 1000).ToString() + "." + (st.ElapsedMilliseconds % 1000).ToString();
      //   string runtime = st.ElapsedMilliseconds.ToString();
      //   Response.Write("总运行时间：" + st.Elapsed + "<br/>" + strUsetime + "<br/>" + (st.ElapsedMilliseconds % 1000).ToString());
         Response.Redirect("../rss.xml");
        // Response.Write("<script type='text/javascript'>window.open('../rss.xml');</script>");//confirm('xml已生成，是否查看？')
    }
    /**/
    /// <summary>
    /// 根据文件路径写RSS文件
    /// </summary>
    /// <remarks>
    /// 例如:
    /// WriteRss("D:Vs2005GenerateRssRSS_Folder est_tb.xml","test_tb")
    /// 注意：根据表的结构,需要调整生成的RSS源。本实例仅供测试用。
    /// </remarks>
    /// <param name="pathfilename">文件路径</param>
    /// <param name="tablename">表名</param>
    /// <returns>true or false</returns>
    public static bool WriteRss(string pathfilename, string tablename)
    {
        try
        {
            FileInfo finfo = new FileInfo(pathfilename);
            using (FileStream fs = finfo.OpenWrite())
            {
                StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("UTF-8"));
                sw.WriteLine(GetRSSString(tablename));
                sw.Flush();
                sw.Close();
            }
            return true;
        }
        catch (System.Exception ex)
        {
            System.Web.HttpContext.Current.Response.Write(ex.Message);
            return false;
            throw;
        }

    }

    /**/
    /// <summary>
    /// 组织符合最新标准的RSS字符串
    /// 参数：表名。
    /// </summary>
    /// <remarks>
    /// 例如:
    /// GetRSS()
    /// 注意：根据表的结构,需要调整生成的RSS源。本实例仅供测试用。
    /// </remarks>
    /// <param name="tablename">表名</param>
    /// <returns>返回一个DataSet 数据源</returns>
    public static string GetRSSString(string Tablename)
    {
        try
        {
            DataSet ds = GetRSSData(Tablename);
            string strRSS = "";

       strRSS = strRSS + "<?xml version='1.0' encoding='utf-8'?>" + System.Environment.NewLine;
             strRSS = strRSS + "<?xml-stylesheet type='text/css' href='http://www./css/Rss.css'?>" + System.Environment.NewLine;
            strRSS = strRSS + "<rss version='2.0'>" + System.Environment.NewLine;
            strRSS = strRSS + " <channel>" + System.Environment.NewLine;
            strRSS = strRSS + " <title>重庆华爱耳鼻喉新闻</title> " + System.Environment.NewLine;
            strRSS = strRSS + " <link>http://www./ylxw</link>" + System.Environment.NewLine;
            strRSS = strRSS + " <description>耳鼻喉医院，重庆华爱，重庆耳鼻喉，重庆耳鼻喉科，重庆耳鼻喉专科医院，重庆最好的耳鼻喉医院，重庆最好的鼻炎医院，重庆治疗急慢性过敏性鼻炎，儿童过敏性鼻炎，最好的耳鼻喉专科医院,重庆华爱耳鼻喉医院,重庆耳鼻喉医院,重庆耳鼻喉专科医院，重庆耳鼻喉医院是重庆最大最专业的耳鼻喉医院,治疗鼻炎，鼻窦炎，过敏性鼻炎，咽喉炎等耳鼻喉疾病更专业,电话：67716771</description>" + System.Environment.NewLine;
            strRSS = strRSS + " <language>zh-CN</language>" + System.Environment.NewLine;
            strRSS = strRSS + " <generator>http://www.</generator> " + System.Environment.NewLine;
            strRSS = strRSS + " <copyright>新加坡兰博耳鼻喉研究所附属医院</copyright> " + System.Environment.NewLine;
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                strRSS = strRSS + " <item>" + System.Environment.NewLine;
                strRSS = strRSS + " <title>" + ds.Tables[0].Rows[i]["lrbt"] + "</title> " + System.Environment.NewLine;
                strRSS = strRSS + " <link>http://www." + ds.Tables[0].Rows[i]["lrlj"] + "</link> " + System.Environment.NewLine;
                strRSS = strRSS + " <author /> " + System.Environment.NewLine;
                //strRSS = strRSS + " <guid>http://www.**.com.cn/ArticleShow@" + ds.Tables[0].Rows[i]["ID"] + ".html</guid>   " + System.Environment.NewLine;
                strRSS = strRSS + " <pubDate>" + Convert.ToDateTime(ds.Tables[0].Rows[i]["lrdt"].ToString()).ToString("yyyy-MM-dd HH:mm") + "</pubDate> " + System.Environment.NewLine;
                //strRSS = strRSS + " <comments>http://www.**.com.cn/ArticleShow@" + ds.Tables[0].Rows[i]["ID"] + ".html</comments>   " + System.Environment.NewLine;
                //strRSS = strRSS + " <slash:comments>0</slash:comments>    " + System.Environment.NewLine;
                strRSS = strRSS + " <source url='http://www." + ds.Tables[0].Rows[i]["lrlj"] + "'> " + ds.Tables[0].Rows[i]["lrbt"] + " </source>" + System.Environment.NewLine;
             strRSS = strRSS + " <description>" + ds.Tables[0].Rows[i]["lrms"] + "</description>" +
                      System.Environment.NewLine;
                strRSS = strRSS + " </item>" + System.Environment.NewLine;
            }
            strRSS = strRSS + " </channel>" + System.Environment.NewLine;
            strRSS = strRSS + " </rss>" + System.Environment.NewLine;
        
            return strRSS;
        }

        catch (Exception ex)
        {
            System.Web.HttpContext.Current.Response.Write(ex.Message);
            throw;
        }
    }
    
    /**/
    /// <summary>
    /// 获取RSS数据源
    /// 参数：表名。
    /// </summary>
    /// <remarks>
    /// 例如:
    /// DataSet ds = GetRSSData(TableName)
    /// 注意：根据表的结构,需要调整生成的RSS源。本实例仅供测试用。
    /// </remarks>
    /// <param name="Tablename">表名</param>
    /// <returns>返回一个DataSet 数据源</returns>
    public static DataSet GetRSSData(string Tablename)
    {
            string strSql = "select top 100 * from " + Tablename + " order by lrdt desc";
            SqlDataAdapter sda = new SqlDataAdapter(strSql, new SqlConnection(DbConfig.DbConnection));
            DataSet DataSet = new DataSet();
            sda.Fill(DataSet, "table");
            return DataSet;
    }
}