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【Asp.Net】 asp.net中生成、读取Rss

作者:dezai / 发布于2014/5/26/ 521

主要是生成、读取xml文件，这里Repeater作为xml的载体，并不真正生成xml文件。要注意语句，CDATA 节用于转义，否则将被识别为标记的文本块。


	主要是生成、读取xml文件，这里Repeater作为xml的载体，并不真正生成xml文件。
	要注意<![CDATA[ ]]>语句，CDATA 节用于转义，否则将被识别为标记的文本块。<![ ]>类似html中的<!---->标签，用于兼容一些浏览器。
	RssFeed.aspx
	<%@ Page language="c#" Codebehind="RssFeed.aspx.cs" AutoEventWireup="false" Inherits="MyRss.RssFeed" %>
	<asp:Repeater id="Repeater1" runat="server">
	<HeaderTemplate>
	<rss version="2.0">
	<channel>
	<title>NewsShow</title>
	<link>http://192.168.1.7/MainOne_HZ/News/</link>
	<description>Rss Feed for 192.168.1.7</description>
	</HeaderTemplate>

	<ItemTemplate>
	<item>
	<title><%# FormatForXML(DataBinder.Eval(Container.DataItem,"newsname")) %></title>
	<description><![CDATA[<%#FormatForXML(DataBinder.Eval(Container.DataItem,"newsinfo"))%>]]></description>
	<link>http://192.168.1.7/MainOne_HZ/News/NewsShow.aspx?ID=<%# DataBinder.Eval(Container.DataItem, "newsid") %></link>
	<pubDate><%# String.Format("{0:R}",DataBinder.Eval(Container.DataItem,"wtime")) %></pubDate>
	</item>
	</ItemTemplate>

	<FooterTemplate>
	</channel>
	</rss>
	</FooterTemplate>
	</asp:Repeater>

	RssFeed.aspx.cs
	 private void Page_Load(object sender, System.EventArgs e)
	 {
	 // 在此处放置用户代码以初始化页面
	 if(!this.IsPostBack)
	 {
	 Response.ContentType="text/xml";
	 SqlConnection con=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]);
	 SqlCommand cmd=new SqlCommand("select top 20 * from news order by newsid desc",con);
	 con.Open();
	 SqlDataReader dr=cmd.ExecuteReader();
	 Repeater1.DataSource=dr;
	 Repeater1.DataBind();
	 dr.Close();
	 con.Close();
	 }
	 }
	 protected string FormatForXML(object input)
	 {
	 string data=input.ToString();
	 data=data.Replace("&","&amp;");
	 data=data.Replace("/","&quot;");
	 data=data.Replace("'","&qapos;");
	 data=data.Replace("<","&lt;");
	 data=data.Replace(">","&gt");
	 return data;
	 }

	ReadRss.aspx
	<%@ Page language="c#" Codebehind="ReadRss.aspx.cs" AutoEventWireup="false" Inherits="MyRss.ReadRss" %>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
	<HTML>
	<HEAD>
	 <title>ReadRss</title>
	 <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
	 <meta name="CODE_LANGUAGE" Content="C#">
	 <meta name="vs_defaultClientScript" content="JavaScript">
	 <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
	</HEAD>
	<body MS_POSITIONING="GridLayout">
	 <form id="Form1" method="post" runat="server">
	 <%
	 string rssURL = "http://192.168.1.7/MainOne_HZ/MyRss/RssFeed.aspx";
	 ProcessRSSItem(rssURL);%>
	 </form>
	</body>
	</HTML>

	ReadRss.aspx.cs
	public void ProcessRSSItem(string rssURL)
	 {
	 System.Net.WebRequest myRequest = System.Net.WebRequest.Create(rssURL);
	 System.Net.WebResponse myResponse = myRequest.GetResponse();

	 System.IO.Stream rssStream = myResponse.GetResponseStream();
	 System.Xml.XmlDocument rssDoc = new System.Xml.XmlDocument();
	 rssDoc.Load(rssStream);

	 System.Xml.XmlNodeList rssItems = rssDoc.SelectNodes("rss/channel/item");

	 string title = "";
	 string link = "";
	 string description = "";

	 for (int i = 0; i < rssItems.Count; i++)
	 {
	 System.Xml.XmlNode rssDetail;

	 rssDetail = rssItems.Item(i).SelectSingleNode("title");
	 if (rssDetail != null)
	 {
	 title = rssDetail.InnerText;
	 }
	 else
	 {
	 title = "";
	 }

	 rssDetail = rssItems.Item(i).SelectSingleNode("link");
	 if (rssDetail != null)
	 {
	 link = rssDetail.InnerText;
	 }
	 else
	 {
	 link = "";
	 }

	 rssDetail = rssItems.Item(i).SelectSingleNode("description");
	 if (rssDetail != null)
	 {
	 description = rssDetail.InnerText;
	 }
	 else
	 {
	 description = "";
	 }

	 Response.Write("<b><a href='" + link + "' target='new'>" + title + "</a></b><br/>");
	 Response.Write(description + "");
	 }
	 }

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