On Error Msgbox Vba Excel
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Forums Excel Questions vba: if error show msgbox Results 1 to 6 of 6 vba: if error show msgboxThis is a discussion on vba: if error show msgbox within the Excel Questions forums, part of
On Error Goto Vba
the Question Forums category; I have a subroutine that opens a file based on excel vba try catch some input from the user.... generally the file it looks ... LinkBack LinkBack URL About LinkBacks Bookmark & Share Digg
Vba Error Handling Best Practices
this Thread!Add Thread to del.icio.usBookmark in TechnoratiTweet this thread Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Oct 17th, 2006,08:17 PM #1 cmhoz Board Regular Join Date vba on error exit sub Aug 2006 Location Australia Posts 268 vba: if error show msgbox I have a subroutine that opens a file based on some input from the user.... generally the file it looks for has a standard naming format used. However sometimes the person responsible for this will use some other name, thus screwing up my macro. Rather than excel showing the generic error box, confusing the user completely, I want it to on error goto line show MY msgbox telling the user to go in and find the file manually... I'm sure I've done this before, but I'm drawing a blank on how I managed it. Any help out there?? Sub openphiac() Dim strfolder as string Dim strphiacfile as string strfolder = Range("folder") strphiacfile = Range("phiacfile") Workbooks.Open Filename:="O:\Phiac Data\PhiacTables\" & strfolder & "\" & strphiacfile & ".xls" End Sub Share Share this post on Digg Del.icio.us Technorati Twitter Reply With Quote Oct 17th, 2006,08:25 PM #2 HalfAce MrExcel MVP Join Date Apr 2003 Location Alaska Posts 9,444 Hi cmhoz Something like this ought to do it. Code: Sub openphiac() Dim strfolder As String Dim strphiacfile As String strfolder = Range("folder") strphiacfile = Range("phiacfile") On Error GoTo ErrMsg Workbooks.Open Filename:="O:\Phiac Data\PhiacTables\" & strfolder & "\" & strphiacfile & ".xls" Exit Sub ErrMsg: MsgBox ("Type in your message here."), , "MESSAGE TITLE" End Sub Share Share this post on Digg Del.icio.us Technorati Twitter Reply With Quote Oct 17th, 2006,08:26 PM #3 Macropheliac Board Regular Join Date Aug 2005 Posts 165 I can't test it, but maybe this: Code: Sub openphiac() On Error GoTo Errormask Dim strfolder As String Dim strphiacfile As String strfolder = Range("folder") strphiacfile = Range("phiacfile") Workbooks.Open Filename:="O:\Phiac Data\PhiacTables\" & strfolder & "\" & strphiacfile & ".xls"
generally put more focus on the coding part and getting the desired result but during this process we forget an
Vba On Error Goto 0
important thing i.e. Error handling. Error handling is an important part of vba error handling in loop every code and VBA On Error Statement is an easy way for handling unexpected exceptions in Excel Macros.
Vba Error Number
A well written macro is one that includes proper exception handling routines to catch and tackle every possible error. Error handling is important because in case of any unexpected exceptions http://www.mrexcel.com/forum/excel-questions/229230-visual-basic-applications-if-error-show-msgbox.html your code doesn’t break. Even if any fatal unexpected error occurs 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 http://www.exceltrick.com/formulas_macros/vba-on-error-statement/ Error statement: On Error Goto 0 On Error Resume Next On Error Goto
three flavors: compiler errors such as undeclared variables that prevent your code from compiling; user data entry error such as a user entering a negative value where only a positive number is acceptable; and run time errors, that occur when VBA cannot correctly execute a program statement. http://www.cpearson.com/excel/errorhandling.htm We will concern ourselves here only with run time errors. Typical run time errors include attempting to access a non-existent worksheet or workbook, or attempting to divide by zero. The example code in this article will use the division by zero http://www.functionx.com/vbaexcel/Lesson26.htm error (Error 11) when we want to deliberately raise an error. Your application should make as many checks as possible during initialization to ensure that run time errors do not occur later. In Excel, this includes ensuring that required workbooks and worksheets on error are present and that required names are defined. The more checking you do before the real work of your application begins, the more stable your application will be. It is far better to detect potential error situations when your application starts up before data is change than to wait until later to encounter an error situation. If you have no error handling code and a run time error occurs, VBA will display its standard run time error dialog box. While this may be on error goto acceptable, even desirable, in a development environment, it is not acceptable to the end user in a production environment. The goal of well designed error handling code is to anticipate potential errors, and correct them at run time or to terminate code execution in a controlled, graceful method. Your goal should be to prevent unhandled errors from arising. A note on terminology: Throughout this article, the term procedure should be taken to mean a Sub, Function, or Property procedure, and the term exit statement should be taken to mean Exit Sub, Exit Function, or Exit Property. The term end statement should be taken to mean End Sub , End Function, End Property, or just End. The On Error Statement The heart of error handling in VBA is the On Error statement. This statement instructs VBA what to do when an run time error is encountered. The On Error statement takes three forms. On Error Goto 0 On Error Resume Next On Error Goto
the wrong time. The application may crash. A calculation may produce unexpected results, etc. You can predict some of these effects and take appropriate actions. Some other problems are not under your control. Fortunately, both Microsoft Excel and the VBA language provide various tools or means of dealing with errors. Practical Learning:Introducing Error Handling Open the Georgetown Dry Cleaning Services1 spreadsheet and click the Employees tab Click the Payroll tab Click the TimeSheet tab To save the workbook and prepare it for code, press F12 Specify the folder as (My) Documents In the Save As Type combo box, select Excel Macro-Enabled Workbook Click Save Introduction to Handling Errors To deal with errors in your code, the Visual Basic language provides various techniques. One way you can do this is to prepare your code for errors. When an error occurs, you would present a message to the user to make him/her aware of the issue (the error). To prepare a message, you create a section of code in the procedure where the error would occur. To start that section, you create a label. Here is an example: Private Sub cmdCalculate_Click() ThereWasBadCalculation: End Sub After (under) the label, you can specify your message. Most of the time, you formulate the message using a message box. Here is an example: Private Sub cmdCalculate_Click() ThereWasBadCalculation: MsgBox "There was a problem when performing the calculation" End Sub If you simply create a label and its message like this, its section would always execute: Private Sub cmdCalculate_Click() Dim HourlySalary As Double, WeeklyTime As Double Dim WeeklySalary As Double ' One of these two lines could produce an error, such as ' if the user types an invalid number HourlySalary = CDbl(txtHourlySalary) WeeklyTime = CDbl(txtWeeklyTime) ' If there was an error, the flow would jump to the label WeeklySalary = HourlySalary