patd1
asked on
error handling on my website
I am using .net framework 4.0 with c#.
I want to auto redirect to a page when any uncaught exception occurs on my web pages.
I introduced an error in the key name on the web.config file to test this functionality.
When I run this in the debugger I get the following error:
"ArgumentNullException was unhandled by user code"
on the following line: throw (new ArgumentNullException());
Please review the following and suggest corrections.
Thanks.
I added this code to my web.config:
Then I added a web form named PageEvent.aspx to my website.
The PageEvent.aspx has the following code:
The PageEvent.aspx.cs has the following code:
I want to auto redirect to a page when any uncaught exception occurs on my web pages.
I introduced an error in the key name on the web.config file to test this functionality.
When I run this in the debugger I get the following error:
"ArgumentNullException was unhandled by user code"
on the following line: throw (new ArgumentNullException());
Please review the following and suggest corrections.
Thanks.
I added this code to my web.config:
<system.web>
<compilation debug="true" targetFramework="4.0"/>
<customErrors defaultRedirect="PageEvent.aspx" mode="On">
</customErrors>
...
</system.web>
Then I added a web form named PageEvent.aspx to my website.
The PageEvent.aspx has the following code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="PageEvent.aspx.cs" Inherits="PageEvent" %>
<!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">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div class = "Error">
<asp:Label ID="Label1" runat="server" Text="Error Caught in Page_Error event."></asp:Label>
<asp:Label ID="_ErrIn" runat="server"></asp:Label>
<asp:Label ID="_ErrMessage" runat="server"></asp:Label>
<asp:Label ID="_StackTrace" runat="server"></asp:Label>
</div>
</form>
</body>
</html>
The PageEvent.aspx.cs has the following code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class PageEvent : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
throw (new ArgumentNullException());
}
public void Page_Error(object sender, EventArgs e)
{
Exception objErr = Server.GetLastError().GetBaseException();
string ErrIN = "Error in: " + Request.Url.ToString();
string ErrMessage = "Error Message: " + objErr.Message.ToString();
string StackTrc = "Stack Trace: " + objErr.StackTrace.ToString();
Server.ClearError();
//show error on screen
_ErrIn.Text = Session["ErrIn"].ToString();
_ErrMessage.Text = Session["ErrMessage"].ToString();
_StackTrace.Text = Session["StackTrc"].ToString();
}
}
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