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asp.net(c#) RSS功能实现代码

2020-04-24 22:03:05
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可能还有很多未完善,但终归可以使用了,以后再慢慢改进!!  
以下是我RSS界面的后台代码,给需要的朋友提供下我的经验:  
代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data;
using System.Data.SqlClient;
using System.Xml;
using System.IO;
using System.Web.Configuration;
public partial class rss : System.Web.UI.Page
{
    string   HostUrl; 
    string   HttpHead;
    protected void Page_Load(object sender, EventArgs e)
    {
        HttpContext context = HttpContext.Current;
        HostUrl = context.Request.Url.ToString();
        HostUrl = HostUrl.Substring(0, HostUrl.IndexOf("/", 8));
        XmlTextWriter writer = new XmlTextWriter(context.Response.OutputStream, System.Text.Encoding.UTF8);
        WriteRSSPrologue(writer);
        WriteRSSHeadChennel(writer);
        string sql = "select top 10 title,id,time,content from blog_title order by time desc";
        SqlDataReader dr = dbconn.ExecuteReader(sql);
        while (dr.Read())
        {
            AddRSSItem(writer, (((DateTime)dr["time"]).ToUniversalTime()).ToString("r"), dr["title"].ToString(), HostUrl, dr["content"].ToString());
        }
        dr.Close();
        writer.Flush();
        writer.Close();
        context.Response.ContentEncoding = System.Text.Encoding.UTF8;
        context.Response.ContentType = "text/xml";
        context.Response.Cache.SetCacheability(HttpCacheability.Public);
        context.Response.End();
    }
    private XmlTextWriter WriteRSSPrologue(XmlTextWriter writer)
    {
        writer.WriteStartDocument();
        writer.WriteStartElement("rss");
        writer.WriteAttributeString("version", "2.0");
        writer.WriteAttributeString("xmlns:dc", "http://purl.org/dc/elements/1.1/");
        writer.WriteAttributeString("xmlns:trackbac", "http://madskills.com/public/xml/rss/module/trackback/");
        writer.WriteAttributeString("xmlns:wfw", "http://wellformedweb.org/CommentAPI/");
        writer.WriteAttributeString("xmlns:slash", "http://purl.org/rss/1.0/modules/slash/");
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