Help w/ Custom Error Handling / Sending Error Emails

We recently had our website switched over to an Apache Web Server and I need to set up custom error pages. Mind you I have absolutely no experience with the Apache Web Server nor any experience with ASP.net so I am pretty much learning as I go. Should the following work

I added this to web config file


<configuration> 
 <system.web> 
 <customErrors mode="On" defaultRedirect="/error.aspx"> 
  <error statusCode="404" redirect="/404.aspx"/> 
  <error statusCode="403" redirect="/403.aspx"/> 
 </customErrors> 
 </system.web> 
</configuration>

For the 404.aspx page I have the following code: (Once the page is accessed I should have an error email sent to me)


<%@ language="C#" EnableSessionState="false" AutoEventWireup="false" %> 
<%@ Import Namespace="System.Web.Mail" %> 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<html> <head><title></title></head> 
<body> 
<table border="0" cellpadding="0" cellspacing="0"> 
<tr> 
<td> 
<% 
  String message = "<p>" + Request.Url.ToString() 
        + "<pre><font color='red'>" + Server.GetLastError().ToString() + "</pre>" 
        + "</font>"; 
  Response.Write(message); 
  Response.Write("We could not locate the page you requested. The administrator of the site has been notified."); 
  MailMessage mail = new MailMessage(); 
  mail.From = "automated@company.com"; 
  mail.To = "webmaster.march@comapany.com"; 
  mail.Subject = "Site Error"; 
  mail.Body = message; 
  mail.BodyFormat = MailFormat.Html; 
  SmtpMail.Send(mail); 
  Server.ClearError(); 
%> 
</td> 
</tr> 
</table> 
</body> 
</html>

When I try to go to the 404.aspx page directly via the website I get the following error:


Description: Error processing request.  
Error Message: HTTP 500.  Stack Trace: System.NullReferenceException: Object reference not set to an instance of an object 
in <0x0009e> ASP._404_aspx:__RenderTree (System.Web.UI.HtmlTextWriter __output, System.Web.UI.Control parameterContainer) 
in (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_HtmlTextWriter_Control (System.Web.UI.HtmlTextWriter,System.Web.UI.Control) 
in <0x00026> System.Web.UI.Control:RenderChildren (System.Web.UI.HtmlTextWriter writer) 
in <0x00011> System.Web.UI.Control:Render (System.Web.UI.HtmlTextWriter writer) 
in <0x00099> System.Web.UI.Control:RenderControl (System.Web.UI.HtmlTextWriter writer) 
in <0x002f1> System.Web.UI.Page:InternalProcessRequest () 
in <0x000a1> System.Web.UI.Page:ProcessRequest (System.Web.HttpContext context)

Any clue as to why I am getting this error? Sorry if this is a stupid question but like I said I have no experience with the Apache Web Server or ASP.net

Thanks in advace

Jeff

Help w/ Custom Error Handling / Sending Error Emails

jmarch51

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