Error Handling In Vbscript Asp
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Vbscript Error Handling Line Number
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 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 exception handling in vbscript show a message. Any ideas? error-handling asp-classic share|improve this question edited Nov 19 '11 at 2:52 casperOne 58k10126202 asked Jan 23 '09 at 11:08 Sander Versluys 23k186785 add a comment| 8 Answers 8 active oldest votes up vote 37 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. %>
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Vbscript Resume On Error
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Vbscript On Error Resume Next
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VBScript in a Nutshell by Matt Childs... Published by O'Reilly Media, Inc. VBScript in a Nutshell Preface Why This Book? Who Should Read This Book? How This Book Should Be Used How This Book Is Structured Conventions in This Book How To Contact https://www.safaribooksonline.com/library/view/vbscript-in-a/1565927206/ch04s02.html Us I. The Basics 1. Introduction 2. Program Structure 3. Data Types and Variables 4. Error Handling and Debugging 5. VBScript with Active Server Pages 6. Programming Outlook Forms 7. Windows Script Host 8. VBScript with Internet Explorer II. Reference 9. The Language Reference III. Appendixes A. Language Elements by Category B. VBScript Constants C. Operators Index Colophon Error Handling Error handling does not involve finding errors in your scripts. Instead, use error handling techniques to allow your program to continue executing error handling even though a potentially fatal error has occurred. Ordinarily, all runtime errors that are generated by the VBScript engine are fatal, since execution of the current script is halted when the error occurs. Error handling allows you to inform the user of the problem and either halt execution of the program or, if it is prudent, continue executing the program.The On Error Resume Next StatementThere are two main elements to error handling in VBScript. The first is the On Error statement, which handling in vbscript informs the VBScript engine of your intention to handle errors yourself, rather than to allow the VBScript engine to display a typically uninformative error message and halt the program. This is done by inserting a statement like the following at the start of a procedure:On Error Resume NextThis tells the VBScript engine that, should an error occur, you want it to continue executing the program starting with the line of code which directly follows the line in which the error occurred. For example, in the simple WSH script:On Error Resume Next x = 10 y = 0 z = x / y Alert za “Cannot divide by Zero” error is generated on the fourth line of code because the value of y is 0. But because you’ve placed the On Error statement in line 1, program execution continues with line 5. The problem with this is that when an error is generated, the user is unaware of it; the only indication that an error has occurred is the blank Alert box (from line 5) that’s displayed for the user.TipA particular On Error statement is valid until another On Error statement in the line of execution is encountered. This means that if Function A contains an On Error statement, and Function A calls Function B, but Function B does not contain an On Error statement, the error handling from Function A is still valid. Therefore, if an error occurs in Function B, it is th