RSS 订阅功能的实现

很多站点多会用到RSS订阅功能，今天写了个，留个笔记。

我们可以用.aspx,.ashx文件构建xml文件，输出xml 可以通过 XmlTextWriter实例化来输出，也可以直接输出。

1.利用XmlTextWriter输出

代码

protected String uid = String.Empty;
protected void Page_Load(object sender, EventArgs e)
{
Response.Clear();
uid = HttpContext.Current.Request.QueryString["id"].ToString();

Response.ContentType = "text/xml";
Response.Charset = "GB2312";
Response.Write(GetRSS());
}

#region
/// <summary>
/// 取得聚合文章
/// </summary>
public string GetRSS()
{
UserBasicModelInfo info = UserBasic.GetBasicList(uid);

DataSet ds = wdxt_Common.GetSomeData.GetDataNum("VW_NEWLOG", "*", "LOGSEECOMPETENCE=1 and userinfoid=" + uid + "", "addtime desc ", 100);
String strRSS = "<?xml version=\"1.0\" encoding=\"gb2312\" ?><rss version=\"2.0\">";
strRSS += "<channel>";
strRSS += "<title>" + info.TrueName + "的博客</title>";
strRSS += "<link>" + Application["Url"] + "/Myspace/Space/Rss1.aspx?id=" + uid + "</link>";
strRSS += "<description></description>";
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
string Logid = ds.Tables[0].Rows[i]["logid"].ToString();
string LogContent = ds.Tables[0].Rows[i]["LogContent"].ToString();
string Title = ds.Tables[0].Rows[i]["logtitle"].ToString();
String LogAddTime = ds.Tables[0].Rows[i]["Addtime"].ToString();
string truename = ds.Tables[0].Rows[i]["TrueName"].ToString();

strRSS += "<item>";
strRSS += "<title>" + Title + "</title>";
strRSS += "<link>" + Application["Url"] + "/Blog/info/" + Logid + "</link>";
strRSS += "<pubDate>" + LogAddTime + "</pubDate>";
strRSS += "<copyright>" + truename + "</copyright>";
strRSS += "<description><![CDATA[" + LogContent + "]]></description>";
strRSS += "</item>";
}
strRSS += "</channel>";
strRSS += "</rss>";
return strRSS;
}
#endregion

参考：1. 微软的CSASPNETRssFeeds

2. 我的源码

3. 可能还要为站点添加到别的网站的RRS链接，可以看看博客园的。