June 2002
Intermediate to advanced
816 pages
28h 12m
English
Content preview from ASP.NET in a NutshellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
GetLastError
Synopsis
LastException = Server.GetLastError( )
Returns the last exception thrown.
Parameters
-
LastException An object of type Exception to receive the application’s last exception.
Example
The code in GetLastError.aspx displays a button
that, when clicked, calls a server-side event handler that declares
three Integers and purposely divides by zero (a no-no) to cause an
exception. The code in the Page_Error event handler declares an
Exception object and a String, gets the Exception using GetLastError,
tests whether the object reference is valid and assigns the Message
property of the exception to the string variable, and then writes the
value to the browser using the Response.Write method. You can also
call the GetLastError method from the Application_Error event
handler, which you can place in the global.asax
file to catch errors that have not been handled at the page level.
<%@ Page Language="VB" %> <html> <head> <title>Examining the Last Error</title> <script runat="server"> Sub CauseError(sender As Object, e As EventArgs) Dim x, y, z As Integer y = 1 z = 0 x = y / z End Sub Sub Page_Error(Source As Object, E As EventArgs) Dim LastError As Exception Dim ErrMessage As String LastError = Server.GetLastError( ) If Not LastError Is Nothing Then ErrMessage = LastError.Message Else ErrMessage = "No Errors" End If Response.Write("Last Error = " & ErrMessage & "<br/><br/>") Server.ClearError( ) End Sub </script> </head> <body> <form runat="server"> <h4><font face="verdana">Cause ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.