On Error Continue Vbs
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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 Learn more about hiring developers or posting on error resume next vba ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join vbscript on error exit the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes on error resume next vbscript w3schools a minute: Sign up What does the “On Error Resume Next” statement do? up vote 41 down vote favorite 4 I came to some VBScript examples, and I saw the statement On Error Resume Next basically at the beginning of the
On Error Resume Next Example
script. What does it do? vbscript error-handling share|improve this question edited Feb 4 '10 at 20:42 Helen 18.3k44174 asked Feb 4 '10 at 20:18 Omar 3,364114280 4 It is a very powerful, but dangerous bit of syntax. Be very cautious using it. –Nate Feb 4 '10 at 20:22 2 It makes more sense now. After some functions that can end up in error. They have a function called checkError after them. –Omar Feb 4 '10 at 20:37 add a comment| error handling in vbscript tutorial 6 Answers 6 active oldest votes up vote 56 down vote accepted It basically tells the program when you encounter an error just continue at the next line. share|improve this answer answered Feb 4 '10 at 20:19 David 2,2601523 add a comment| up vote 24 down vote It's worth noting that even when On Error Resume Next is in effect, the Err object is still populated when an error occurs, so you can still do C-style error handling. On Error Resume Next DangerousOperationThatCouldCauseErrors If Err Then WScript.StdErr.WriteLine "error " & Err.Number WScript.Quit 1 End If On Error GoTo 0 share|improve this answer answered Feb 5 '10 at 15:49 Tmdean 6,5002645 add a comment| up vote 19 down vote When an error occurs, the execution will continue on the next line without interrupting the script. share|improve this answer answered Feb 4 '10 at 20:19 Pierre-Alain Vigeant 13.7k44388 add a comment| up vote 8 down vote It means, when an error happens on the line, it is telling vbscript to continue execution without aborting the script. Sometimes, the On Error follows the Goto label to alter the flow of execution, something like this in a Sub code block, now you know why and how the usage of GOTO can result in spaghetti code: Sub MySubRoutine() On Error Goto ErrorHandler REM VB code... REM More VB Code... Exit_MySubRoutine: REM Disable the Error Handler! On Error Goto 0 REM Leave.... Exit Sub ErrorHandler: REM Do something
error handling On Error goto
On Error Resume Next Uft
0 - Disable error handling Error properties: err.Number (default) err.Source err.Description Examples
On Error Resume Next Not Working
In the examples below - replace the 'code goes here' line with your VBScript commands. Example 1) Trap http://stackoverflow.com/questions/2202869/what-does-the-on-error-resume-next-statement-do an error On Error Resume Next' code goes hereIf Err.Number <> 0 Then 'error handling: WScript.Echo Err.Number & " Srce: " & Err.Source & " Desc: " & Err.Description Err.ClearEnd If Example 2) Trap an error or http://ss64.com/vb/onerror.html success On Error Resume Next' code goes hereIf Err.Number = 0 Then WScript.Echo "It worked!" Else WScript.Echo "Error:" WScript.Echo Err.Number & " Srce: " & Err.Source & " Desc: " & Err.Description Err.ClearEnd If Example 3) Trap an error On Error Resume Next' code goes hereIf Err.Number <> 0 Then ShowError("It failed") Sub ShowError(strMessage) WScript.Echo strMessage WScript.Echo Err.Number & " Srce: " & Err.Source & " Desc: " & Err.Description Err.Clear End Sub “Success is falling nine times and getting up ten” ~ Jon Bon Jovi Related: Syntax - error codes InputBox - Prompt for user input Equivalent in PowerShell: ErrorAction and $errorActionPreference © Copyright SS64.com 1999-2016 Some rights reserved
provides a tutorial example on how to use the 'On Error Resume Next' statement to turn on error handling flag. You can use Err.Number > 0 to test if there is any runtime error has been raised or http://www.herongyang.com/VBScript/Error-Handling-On-Error-Resume-Next.html not. We have seen what happens when the error handling flag is turned off in the previous section. Now let's see how the "On Error Resume Next" statement should be used: By default, the error handling flag is http://ns7.webmasters.com/caspdoc/html/vbscript_on_error_statement.htm turned off. You can turn on the error handling flag at time your want by entering the "On Error Resume Next" statement. Once the error handling flag is turned on, execution will not be stopped when a on error runtime error occurs. You can use the condition of (Err.Number>0) to determine a runtime error has occurred or not. If a runtime error has occurred, use Err object properties to get more information about the error: Err.Number - "Err" object property containing the error code. Err.Description - "Err" object property containing the error description. Err.Source - "Err" object property containing error source identification. I have modified the VBScript example used in the previous section on error resume to try to check the "Err" object by myself with the error handling flag turned on:
Run this example code in IE, you will get: There is no error at this time. Before statement: x = 1/0 Before statement: y = CInt(777777) Before statement: z = 1 + "2nd" End of test A runtime error has occurred: Err.Number = 13 Err.Description = Type mismatch Err.Source = Microsoft VBScript runtime error The output confirms that: When CheckError() was called at the beginning, Err.Number is 0, indicating that there is no runtime error. When the first runtime error occurred on statement, x = 1/0, executi
On Error Statement If you don't use an On Error Resume Next statement, any run-time error that occurs is fatal; that is, an error message is displayed and execution stops. On Error Resume Next causes execution to continue with the statement immediately following the statement that caused the run-time error, or with the statement immediately following the most recent call out of the procedure containing the On Error Resume Next statement. This allows execution to continue despite a run-time error. You can then build the error-handling routine inline within the procedure. An On Error Resume Next statement becomes inactive when another procedure is called, so you should execute an On Error Resume Next statement in each called routine if you want inline error-handling within that routine. The following example illustrates use of the On Error Resume Next statement: On Error Resume Next Err.Raise 6' Raise an overflow error. MsgBox "Error # " & CStr(Err.Number) & " " & Err.Description Err.Clear' Clear the error. Copyright 2002 Sun Microsystems, Inc. All rights reserved. Legal Notice.