asked 4 years ago viewed 31860 times active 8 months ago Linked 0 Don't let error occur when trying to open a file using vba Related 7How to re-enable the default b y strong (CU00713B) Copyright 2006-2016 aprenderaprogramar.com La web abierta a cualquier persona interesada en la programación Pearson Close the A-drive and My Computer windows. While this may be acceptable, even desirable, in a development environment, it is not acceptable to the end user in a production environment. Check This Out
It often makes sense, even at the top level, to be explicit about which lines of code have "active" error handling, then to turn it back off again. For example if procedure A calls B and B calls C, and A is the only procedure with an error handler, if an error occurs in procedure C, code execution is Try On Error Goto 0 after ' do something to restore the error handling of the calling function. Antes del error o después de ser tratado las propiedades son las de defecto (en general cero, cadenas vacías o mensajes estándar).
Then clear the Err object. Case 6 ' Divide by zero error MsgBox("You attempted to divide by zero!") ' Insert code to handle this error Case Else ' Insert code to handle other situations here... Run the program and click the Crash button.
En el caso a) hacemos que el programa salte a la línea especificada, que tendrá que estar en el mismo procedimiento en que se ha producido el error. You’ll be auto redirected in 1 second. vb6 error-handling share|improve this question edited Apr 9 '12 at 18:59 Kate Gregory 16.1k74478 asked May 3 '10 at 10:46 CJ7 4,99732114220 See stackoverflow.com/questions/2062058/… –Daniel Daranas May 3 '10 Vba Error Handling Best Practices However, the error may have side effects, such as uninitialized variables or objects set to Nothing.
What are the alternatives of compound interest for a Muslim? On Error Goto Line The following code attempts to activate a worksheet that does not exist. By default, without any sort of error handling, the app will crash. Without an On Error GoTo 0 statement, an error handler is automatically disabled when a procedure is exited.On Error GoTo -1On Error GoTo -1 disables the exception in the current procedure.
Sorry I don't have VB6 installed anymore. Vb6 On Error Resume Next If an error occurs while an error handler is active (between the occurrence of the error and a Resume, Exit Sub, Exit Function, or Exit Property statement), the current procedure's error Whenever an error occurs, code execution immediately goes to the line following the line label. How to fix a bent lens mount hook?
You should specify your error by adding your error code to the VbObjectError constant. En el programa anterior, si después de la línea 88 mostramosErr.Number sobre un Label nos devuelve un 6. On Error Goto If an error occurs while an error handler is active (between the occurrence of the error and a Resume, Exit Sub, Exit Function, or Exit Property statement), the current procedure's error On Error Goto 0 Vbscript What to do when majority of the students do not bother to do peer grading assignment?
a sort of Trust the Force, Luke approach to trying to mask coding errors. his comment is here For example, On Error Resume Next N = 1 / 0 ' cause an error If Err.Number <> 0 Then N = 1 End If Output a googol copies of a string How much more than my mortgage should I charge for rent? Exit Function Handler: Err.Raise Err.Number, , "MiscFunctions.DoSomething: " & Err.Description End Function You'll then be able to get the error number and description in the caller via Err.Number and Err.Description. On Error Exit Sub
Vale cero (falso) si no se ha producido un error. Con este tipo de curso, podrás aprender a programar de forma ágil y amena. If a run-time error occurs, control branches to the specified line, making the error handler active. this contact form The table may or may not already exist.
Related 12what is the better way to handle errors in VB67How to re-enable the default error handling in VB612Difference between Resume and Goto in error handling block2VB6: does “On Error Goto Vba Error Handling In Loop Tipos primitivos (int, boolean...) y objeto (String, array o arreglo...) Variables (CU00621B) Ejercicios resueltos en Visual Basic con Forms, Labels, Textbox y Buttons (Command). Then clear the Err object.
On Error Goto MyHandler ...some code that throws an error... vb6 error-handling share|improve this question asked Jan 27 '12 at 15:25 JimDel 2,05653369 add a comment| 3 Answers 3 active oldest votes up vote 8 down vote accepted The divide by Por último c) desactiva el control de errores, con lo que en caso de producirse uno el programa se detendrá o será impredecible. Vba Error Number It is very important to remember that On Error Resume Next does not in any way "fix" the error.
Code the cmdCrash_Click event as follows: Private Sub cmdCrash_Click() Open "A:\JUNK.TXT" For Input As #1 MsgBox "File was opened successfully" Close #1 End Sub 4. The more checking you do before the real work of your application begins, the more stable your application will be. You should get the message "File was opened successfully." Click any of the other buttons; they should all produce the same result. navigate here The content you requested has been removed.
End Sub RequirementsNamespace: Microsoft.VisualBasicAssembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)See AlsoErrNumberDescriptionLastDllErrorEnd StatementExit Statement (Visual Basic)Resume StatementError Messages (Visual Basic)Try...Catch...Finally Statement (Visual Basic) Show: Inherited Protected Print Export (0) Print Export (0) Share I would say in general, use it sparingly. Name them and set their Captions as follows: Name Caption cmdCrash Crash cmdGoToLabel GoTo Label cmdGoTo0 GoTo 0 cmdResumeNext Resume Next Your form should look something like this: Private Sub cmdResumeNext_Click() Dim intResponse As Integer Dim blnFileOpenedOK As Boolean On Error Resume Next Do intResponse = MsgBox("Insert the disk containing 'JUNK.TXT' in drive A", _ vbOKCancel, _
Has there ever been a sideways H-tail on an airplane? It is a section of code marked by a line label or a line number.Number PropertyError-handling routines rely on the value in the Number property of the Err object to determine On Error GoTo ErrHandler: Worksheets("NewSheet").Activate Exit Sub ErrHandler: If Err.Number = 9 Then ' sheet does not exist, so create it Worksheets.Add.Name = "NewSheet" The example code in this article will use the division by zero error (Error 11) when we want to deliberately raise an error.
Private Function DoSomething(ByVal Arg as String) On Error GoTo Handler Dim ThisVar as String Dim ThatVar as Long ' Code here to implement DoSomething... Ahora puedes seguirnos en Facebook. We will concern ourselves here only with run time errors. For example, suppose you want to drop a table from a database.
The code should look like this: Private Sub cmdGoTo0_Click() On Error GoTo OpenFileError On Error GoTo 0 Open "A:\JUNK.TXT" For Input As #1 MsgBox "File was opened successfully" Close Por ejemplo "Nombre o número de archivo incorrecto", “La operación aritmética ha provocado un desbordamiento”, etc. Without an On Error GoTo 0 statement, an error handler is automatically disabled when a procedure is exited.On Error GoTo -1On Error GoTo -1 disables the exception in the current procedure. You can place error-handling code anywhere in a procedure.Untrapped ErrorsUntrapped errors in objects are returned to the controlling application when the object is running as an executable file.
Name for the peak of a plateau How should I deal with players who prefer "realistic" approaches to challenges? 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