Classic Asp Vbscript Error Handling
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Vbscript Error Handling Best Practices
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it only takes a minute: Sign up using “on error resume next” in classic ASP, and how to handle errors up vote 6 down vote favorite Good day all, I would like to ask a thing about on error resume next let's assume we have a loop to navigate through a recordset like: Do while not rs.EOF query = vbscript error handling examples "UPDATE ...." conn.execute(query) rs.movenext loop i would like to be sure the UPDATE is going good, and i would like to check if there is some problems, so I have put a debugging features in the code like: Do while not rs.EOF query = "UPDATE ...." on error resume next conn.execute(query) If Err.Number <> 0 Then Response.write(Err.Number) response.write("
") response.write(Err.description) response.write("
") response.write(query) response.write("
") end if on error goto 0 rs.movenext loop the question is : during a loop, if it encounters an error, the next cycle will the error be there (and so triggers again the error block) ? or on error goto 0 will clear the Err object? in other words, will it works as a error handling? asp-classic vbscript error-handling share|improve this question edited Jul 3 '13 at 10:51 Alex K. 106k16146194 asked Jul 3 '13 at 10:43 Matteo Bononi 'peorthyr' 76951749 add a comment| 3 Answers 3 active oldest votes up vote 5 down vote accepted VBScript resets the error on goto 0: on error resume next i = 1 / 0 WScript.echo( err.number )
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Vbscript Error Handling Function
more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags error handling in vbscript tutorial Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, vbscript clear error helping each other. Join them; it only takes a minute: Sign up In classic ASP, is there a way to handle errors at application level? up vote 11 down vote favorite 4 In classic ASP, is there a http://stackoverflow.com/questions/17445890/using-on-error-resume-next-in-classic-asp-and-how-to-handle-errors way to handle error at application level? Is there guidelines for handling error / exceptions in classic ASP 3 ? The Server.GetLastError() not a lot to work with... I am looking for something like the Application_Error() found in an ASP.Net Global.asax. Any equivalent in a global.asa ? Classes to intelligently log the error ? Like an old Enterprise library exception handling for ASP3... Hey, I am a dreamer ! Thanks a lot for any pointers asp-classic http://stackoverflow.com/questions/1603786/in-classic-asp-is-there-a-way-to-handle-errors-at-application-level error-handling share|improve this question edited Oct 22 '09 at 3:05 AnonJr 2,32411736 asked Oct 21 '09 at 21:31 PBelanger 6211823 Can we assume you're loading VB6 objects? –ChaosPandion Oct 21 '09 at 21:35 Did you think is possible to create an IHttpModule in .net and attach your module to a web site, just for trap the error on the web site ? –Cédric Boivin Oct 22 '09 at 12:42 Can you give an example of Application-Level activities in your Global.ASA that you're concerned about? Aside from ON ERROR RESUME NEXT, I don't think there's much... –CLaFarge Jun 22 '15 at 2:09 add a comment| 4 Answers 4 active oldest votes up vote 10 down vote accepted try: some code that can raise an error except: do error handeling stuff finally: clean up, close files etc Can be emulated in vbscript as follows: class CustomErrorHandler private sub class_terminate if err.number > 0 then do error handeling stuff end if clean up, close files etc end sub end class with new CustomErrorHandler some code ... end with How does this work? The 'class_terminate' method will be called when the newly created instance goes out of scope. This happens either when the interperter hits the 'end with' statement or when the callstack gets unwinded due to an error. It's less pretty then the
Forums Links DISCUSSIONARCHIVES DISCUSSIONARCHIVES2 DISCUSSIONARCHIVES3 BLOG We didn't realize the site was so popular. Other Stuff How To Use On Error Resume Next Often when using ASP or Active Server Pages http://www.powerasp.net/content/new/on-error-resume-next.asp with VBScript you will find it 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 an error message is returned to the browser. If you want to continue processing your page even if an error is error handling 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 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 vbscript error handling 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 add "On Error Resume Next" here simply so no nasty error message come up if by chance write permissions to the text file do not exist. <% Set ObjMyFile = CreateObject("Scripting.FileSystemObject") Err.Clear On Error Resume Next LogFileName = "aspprotect.log" LogFileDirectory = "c:\somedirectory" 'Open Text File.. If doesn't exist create it and append to it .. If exists just append to it Set WriteMyData = ObjMyFile.OpenTextFile(LogFileDirectory & "\" & LogFileName,8,True) RowHeaderString = Session("User_ID") & vbTab RowHeaderString = RowHeaderString & Session("Username") & vb