Asp Vbscript On Error Handling
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Vbscript Error Handling Line Number
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Vbscript Error Handling Function
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Vbscript On Error Goto Example
each other. Join them; 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 http://www.codeguru.com/csharp/.net/net_general/debugginganderrorhandling/article.php/c19557/ASP-and-the-Error-Handler.htm 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 = "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 http://stackoverflow.com/questions/17445890/using-on-error-resume-next-in-classic-asp-and-how-to-handle-errors 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' 76451749 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 ) '' prints 11 (div by 0) on error goto 0 WScript.echo( err.number ) '' prints 0 (no error) There is also the explicit err.clear(). share|improve this answer answered Jul 3 '13 at 10:49 Alex K. 106k16146194 oh, nice to know the err.clear(), thanks ! :D –Matteo Bononi 'peorthyr' Jul 3 '13 at 10:53 add a comment| up vote 2 down vote The correct code to use is Err.Clear I have tested it with the following code <%on error resume next response.write (p(10)) Response.write(Err.Number) response.write("
") response.write(Err.description) response.write("
") Err.Clear Response.write(Err.Number) response.write("
") response.write(Err.description) response.write("
") %> And you can see the correct response is b
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 http://www.powerasp.net/content/new/on-error-resume-next.asp when using ASP or Active Server Pages with VBScript you will find it necessary to http://www.codeproject.com/Questions/404785/Error-handling-in-Classic-ASP 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 error handling 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 error in some way. The example below opens a database connection and shows you how to trap vbscript error handling 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 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
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