作为记录,我对 Java 和 RnR 比任何 .NET 都熟悉得多。我在这里和那里修复了一个函数中的一些错误,并在这里和那里搜索了一些新的“功能”,但这不是我的专长。好的,请注意,这是我的问题,我需要为我们在 ASP.NET 中构建的网站创建一个 RSS 提要。谷歌提供了一些解决方案,但我以这个为例: http ://www.aspfree.com/c/a/C-Sharp/Creating-an-RSS-Feed-with-ASP-Net-Written-在-C-夏普/
奇怪的是,我完全可以正常工作,没有看到任何错误,但是运行它时我只得到一个空白页。我已经测试了 SQL,它可以工作并返回我想要的行,但我不知道如何诊断它是否连接到数据库或为什么它没有返回任何内容。这是代码:
asp.aspx.cs:
using System;
using System.Text;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Xml;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Diagnostics;
//Class for returning RSS feed Data
public partial class rss : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
string sSource;
string sLog;
string sEvent;
sSource = "RSS Feed";
sLog = "Application";
sEvent = "Database Connectiont";
// Connect to the Database
SqlConnection myConnection = new SqlConnection("Data Source=localhost;Initial Catalog=events;Persist Security Info=True;User ID=wa;Password=password;");
// Retrieve the SQL query results and bind it to the Repeater
const string SQL_QUERY = "SELECT EventName, Comments, URL, StartDate FROM event WHERE SaleDateTo > getdate() AND SaleDateFrom < getdate() AND redirecttourl is not null ORDER BY EventDate";
SqlCommand myCommand = new SqlCommand(SQL_QUERY, myConnection);
bool IsDbAvailable = true;
try {
myConnection.Open();
rptRSS.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
rptRSS.DataBind();
myConnection.Close();
}
catch {
IsDbAvailable = false;
if (!EventLog.SourceExists(sSource))
EventLog.CreateEventSource(sSource,sLog);
}
finally {
myConnection.Close();
}
}
protected string FormatForXML(object input)
{
string data = input.ToString(); //cast input to string
// replace those characters disallowed in XML documents
data = data.Replace("&", "&");
data = data.Replace("\"", """);
data = data.Replace("'", "'");
data = data.Replace("<", "<");
data = data.Replace(">", ">");
return data;
}
}
rss.aspx:
<%@ Page language="c#" CodeFile="rss.aspx.cs" ContentType="text/xml" AutoEventWireup="false" Inherits="rss"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<asp:Repeater id="rptRSS" runat="server">
<HeaderTemplate>
<rss version="2.0">
<channel>
<title>TA On-Sale Feed</title>
<link>http://www.website.com/rss.aspx</link>
<description>All events current on-sale</description>
</HeaderTemplate>
<itemTemplate>
<event>
<title><%#FormatForXML(DataBinder.Eval(Container.DataItem,"EventName"))%>
</title>
<description>
<%#FormatForXML(DataBinder.Eval(Container.DataItem, "Comments"))%>
</description>
<link>http://order.ticketalternative.com<%#DataBinder.Eval(Container.DataItem, "url")%>
</link>
<eventdate>
<%#DataBinder.Eval(Container.DataItem, "StartDate")%>
<eventdate>
</event>
</ItemTemplate>
<FooterTemplate>
</channel>
</rss>
</FooterTemplate>
</asp:Repeater>
</html>