Excel Vba Exit Sub Before Error Handler
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Excel Vba Try Catch
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Vba Error Handling Best Practices
Sub vs. End Sub up vote 13 down vote favorite 1 Why would I want to get out of an Error Handler (after handling) with an Exit Sub instead of just letting it go to the End Sub? I'm sure it's simple. I just don't understand. Thanks for any help. Example: Public Sub SubA() On Error Goto ProcError ''# other code MsgBox FuncA() ProcExit: Exit vba on error goto 0 Sub ProcError: MsgBox Err.Description Resume ProcExit End Sub vba vb6 error-handling share|improve this question edited Sep 4 '09 at 12:06 AnthonyWJones 144k22195274 asked Sep 4 '09 at 3:53 RNamo add a comment| 2 Answers 2 active oldest votes up vote 19 down vote accepted Your ProcExit label is your place where you release all the resources whether an error happened or not. For instance: Public Sub SubA() On Error Goto ProcError Connection.Open Open File for Writing SomePreciousResource.GrabIt ProcExit: Connection.Close Connection = Nothing Close File SomePreciousResource.Release Exit Sub ProcError: MsgBox Err.Description Resume ProcExit End Sub share|improve this answer answered Sep 4 '09 at 5:08 AngryHacker 23.1k60199387 1 +1. And, obviously, if you don't need to close or release any resources, there's no need for it and you can just fall through to the End Sub. –MarkJ Sep 4 '09 at 8:16 @MarkJ: Thats probably Ok but I'd be uncomfortable with that, If the error has truely been "handled" I'd prefer to Resume to ProcExit even if its immediately followed with Exit Sub. –AnthonyWJones Sep 4 '09 at 12:05 7 Wouldn't this cause an infinite loop if something below ProcExit raise
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Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation vba error handling in loop Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like vba error number you, helping each other. Join them; it only takes a minute: Sign up VBA On Error Exit Calling Function up vote 0 down vote favorite 1 I have a simple excel function that connects to a db http://stackoverflow.com/questions/1377152/error-handler-exit-sub-vs-end-sub and retrieves some data and populates a worksheet. The function calls another function to make the db connection and return the query results. How do I exit the calling function if there is an error connecting to the database? This is what my function looks like that connects to the DB. If there is an error connecting to the DB, the messagebox is displayed but then processing resumes in the calling function and then I get http://stackoverflow.com/questions/23550468/vba-on-error-exit-calling-function an ugly "END or DEBUG" message box...which I am trying to avoid. Public Function QueryDB(sQuery As String) On Error GoTo ErrorHandler ... Connect to database and get data ErrorHandler: ... Display a messagebox telling the user there is an error 'Resume Next Exit Function End Function excel vba excel-vba error-handling share|improve this question asked May 8 '14 at 19:05 mack 53421730 possible duplicate of Function always returns False. Why? –enderland May 8 '14 at 21:56 This was asked earlier today - stackoverflow.com/q/23544530/1048539 –enderland May 8 '14 at 21:56 Thanks, enderland, I'll take a look at that question. –mack May 9 '14 at 18:24 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote Public Function QueryDB(sQuery As String) On Error GoTo ErrorHandler '... Connect to database and get data ' Exit function before the error handler so ' it doesn't get processed every run Exit Function ErrorHandler: ' ... Display a messagebox telling the user there is an error MsgBox "Oops! An error occurred." End Function You may want to handle your errors in the calling sub though since errors "bubble up" to the caller. This will cause your macro to debug even though you have an error handler in QueryDB. Here is an example of how you can handle errors in called func
generally put more focus on the coding part and getting the desired result but during this process we forget an important thing i.e. Error handling. Error http://www.exceltrick.com/formulas_macros/vba-on-error-statement/ handling is an important part of every code and VBA On Error Statement is an easy way for handling unexpected exceptions in Excel Macros. A well written macro is one that includes http://www.excel-easy.com/vba/examples/error-handling.html proper exception handling routines to catch and tackle every possible error. Error handling is important because in case of any unexpected exceptions your code doesn’t break. Even if any fatal unexpected error occurs on error in the code then also you should ensure that the code should terminate gracefully. Definition of VBA On Error Statement: On Error statement instructs VBA Compiler, what to do in case any runtime exception are thrown. Syntax of On Error Statement: Basically there are three types of On Error statement: On Error Goto 0 On Error Resume Next On Error Goto
execution at a specified line upon hitting an error. Situation: Both programs calculate the square root of numbers. Square Root 1 Add the following code lines to the 'Square Root 1' command button. 1. First, we declare two Range objects. We call the Range objects rng and cell. Dim rng As Range, cell As Range 2. We initialize the Range object rng with the selected range. Set rng = Selection 3. We want to calculate the square root of each cell in a randomly selected range (this range can be of any size). In Excel VBA, you can use the For Each Next loop for this. Add the following code lines: For Each cell In rng Next cell Note: rng and cell are randomly chosen here, you can use any names. Remember to refer to these names in the rest of your code. 4. Add the following code line to the loop. On Error Resume Next 5. Next, we calculate the square root of a value. In Excel VBA, we can use the Sqr function for this. Add the following code line to the loop. cell.Value = Sqr(cell.Value) 6. Exit the Visual Basic Editor and test the program. Result: Conclusion: Excel VBA has ignored cells containing invalid values such as negative numbers and text. Without using the 'On Error Resume Next' statement you would get two errors. Be careful to only use the 'On Error Resume Next' statement when you are sure ignoring errors is OK. Square Root 2 Add the following code lines to the 'Square Root 2' command button. 1. The same program as Square Root 1 but replace 'On Error Resume Next' with: On Error GoTo InvalidValue: Note: InvalidValue is randomly chosen here, you can use any name. Remember to refer to this name in the rest of your code. 2. Outside the For Each Next loop, first add the following code line: Exit Sub Without this line, the rest of the code (error code) will be executed, even if there is no error! 3. Excel VBA contin