Asp Sql Error Handling
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business asp classic sql error handling Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation exception handling in classic asp Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just classic asp catch sql error like you, helping each other. Join them; it only takes a minute: Sign up Is try-catch like error handling possible in ASP Classic? up vote 26 down vote favorite 9 What options are there in ASP Classic
Classic Asp Error Handling
for error handling? For example: I'm using the Mail.SendMail function but when switching on the testing server it doesn't work, which is normal. I want to test if mailing is possible, if not then continue and/or show a message. Any ideas? error-handling asp-classic share|improve this question edited Nov 19 '11 at 2:52 casperOne 57.9k10126202 asked Jan 23 '09 at 11:08 Sander Versluys 22.9k186785 add a comment| 8 Answers 8 active oldest votes up vote 37 oracle sql error handling down vote accepted There are two approaches, you can code in JScript or VBScript which do have the construct or you can fudge it in your code. Using JScript you'd use the following type of construct: In your ASP code you fudge it by using on error resume next at the point you'd have a try and checking err.Number at the point of a catch like: <% Dim i ' Turn on error Handling On Error Resume Next 'Code here that you want to catch errors from ' Error Handler If Err.Number <> 0 Then ' Error Occurred / Trap it On Error Goto 0 ' But don't let other errors hide! ' Code to cope with the error here End If On Error Goto 0 ' Reset error handling. %> share|improve this answer edited Oct 17 '12 at 11:42 Shadow Wizard 49.1k1385130 answered Jan 23 '09 at 11:19 Wolfwyrd 10.2k42861 2 +1. Javascript. If you need it, forget VBscript use javascript. –AnthonyWJones Jan 25 '09 at 23:24 add a comment| up vote 7 down vote A rather nice way to handle this for missing COM classes: Dim o:Set o = Nothing On Error Resume Next Set o = CreateObject("foo.bar") On Error Goto 0 If o Is Nothing Then Res
Tutorials MSDN Communities Hub Official Docs Security Stump the SQL Guru! XML Info Information: Feedback Author an Article Published: Thursday, June 03, 1999 Error Handling in ASP sql 2005 error handling You just finished your ASP application in time, barely making the
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dealine! As you upload the final version to the webserver, you receive an email from your supervisor indicating
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that he's ready for your demo. You confidently stride into his office and give him instructions on accesses the application through the Intranet. -continued- Your boss comes to the first http://stackoverflow.com/questions/472558/is-try-catch-like-error-handling-possible-in-asp-classic page, and is asked to enter his name. You've created a slick, customized feel to the site, recording the user and his or her preferences in a database. Your boss types in his name, "The Pointy Haired Boss," and hits the submit button. Instead of being taken to the next page, he sees the following text pop up on the http://www.4guysfromrolla.com/webtech/060399-1.shtml screen: Microsoft OLE DB Provider for ODBC Drivers error ' 80004005' [Microsoft][ODBC Access 97 ODBC driver Driver] syntax wrong near ' Please note that I just made this error message up, so, please, no emails asking about how one gets this error by entering his name! You get one of those looks from your boss, a look that says, "I hope you weren't expecting a positive performance review." There's nothing worse to an end user than to see those dreaded ADO errors. They are misformatted, cryptic, and leave the user wondering what they are suppose to do. Your average end user doesn't know ODBC from OLE. So how can you prevent these nasty error messages? First you must insert at the top of your ASP page:
<% On Error Resume Next %>This will tell ASP to just skip over any errors, instead of halting execution and printing out a nasty error message. You may be tempted to leave it at this, although if you do, and errors occur, your users won't be aware
BLOG We didn't realize the site was so popular. Other Stuff How To Use On Error Resume Next Often when http://www.powerasp.net/content/new/on-error-resume-next.asp using ASP or Active Server Pages with VBScript you will find it http://www.w3schools.com/asp/ado_ref_error.asp necessary to check for errors when you do certain things that may fail and then handle it accordingly. Things like opening a database connection or writing to a text file come to mind. Generally if an error is encountered in your .asp file, the processing of your script stops and error handling an error message is returned to the browser. If you want to continue processing your page even if an error is encountered, include the following line at the beginning of your .asp file: <% On Error Resume Next %> That being said just ignoring errors in your code is not a very good idea. What you really want to do is handle the sql error handling error in some way. The example below opens a database connection and shows you how to trap a potential error and do whatever you want because of it. In this case we are simply displaying the error. <% ConnectionString = "DBQ=c:\inetpub\wwwroot\mysite\data\mydatabase.mdb;Driver={Microsoft Access Driver (*.mdb)};" '*** This code checks the ConnectionString info you entered and reports back the error code if it is not ok Err.Clear On Error Resume Next Set ConnPasswords = Server.CreateObject("ADODB.Connection") ConnPasswords.Open ConnectionString If Err.Number <> 0 Then Response.Write (Err.Description& "
") Response.Write("This means there is most likely a problem with the" & vbCrLf) Response.Write("""ConnectionString"" info that you specified.
" & vbCrLf) Response.End End If On Error GoTo 0 %> We put the "On Error GoTo 0 at the end because that will essentially end the "on error resume next" That is something you want to do so any later errors in your application do not get ignored without you knowing about it. Below is another example. In this example our application logs user info in a text file when they sign in to a site. We
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