On Error Msgbox Excel
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Vba On Error Msgbox
Forums category; I have a subroutine that opens a file based on some input on error goto vba from the user.... generally the file it looks ... LinkBack LinkBack URL About LinkBacks Bookmark & Share Digg this Thread!Add Thread
Excel Vba Try Catch
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 Aug 2006 Location Australia Posts vba error handling best practices 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 show MY msgbox telling the user to on error goto line 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" Errormask: MsgBox "Text Here!" End Sub Share Share this post on Digg Del.icio
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 handling is an important part of every code and VBA On Error Statement is
Vba On Error Exit Sub
an easy way for handling unexpected exceptions in Excel Macros. A well written macro is vba on error goto 0 one that includes proper exception handling routines to catch and tackle every possible error. Error handling is important because in case of any unexpected
Vba Error Handling In Loop
exceptions 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 http://www.mrexcel.com/forum/excel-questions/229230-visual-basic-applications-if-error-show-msgbox.html 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
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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 continues execution at the line starting with 'InvalidValue:' upon hitting an error (don't forget the colon). Add the following code line: InvalidValue: 4. We keep our error code simple for now. We display a MsgBox with some text and the address of the cell where the error occurred. MsgBox "can't calcul