On Error Goto Errorhandler Vb Net
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Vb.net Try Catch Example
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Vba Error Handling In Loop
be used in VB.NET up vote 0 down vote favorite What error handling should be used in VB.NET? Should one use the "On Error Goto ErrorHandler ... Exit Sub ErrHandler ... End Sub" pattern or should you use the "try { ... } https://msdn.microsoft.com/en-us/library/ms973849.aspx catch { ... } finally { ... }" pattern? vb.net error-handling share|improve this question asked Jun 15 '10 at 8:00 CJ7 4,99232114220 1 And if you even think of using "On Error Resume Next" I'm afraid that we'd have to put you down. –Hans Olsson Jun 15 '10 at 8:09 add a comment| 4 Answers 4 active oldest votes up vote 1 down vote accepted The most obvious reasons I can think of off the top of my head to steer clear of On Error GoTo... http://stackoverflow.com/questions/3043423/what-error-handling-should-be-used-in-vb-net would have to be: On Error GoTo does not discriminate between types of exceptions. On Error GoTo does not provide as much structure as Try/Catch/Finally (e.g., nesting one Try/Catch block within another). On Error GoTo has no counterpart to Finally (that I know of). I'm sure in many cases, clever use of On Error GoTo could mimic the behavior that is built in to VB.NET's Try/Catch/Finally feature. But what would be the point? share|improve this answer answered Jun 15 '10 at 8:27 Dan Tao 78.7k27204359 add a comment| up vote 6 down vote "try { ... } catch { ... } finally { ...}" pattern by a long shot. C# try { // Do Something that may go wrong } catch (Exception ex) { //Do something with the error } finally { //Cleanup } or VB Try // Do Something that may go wrong Catch ex as Exception //Do something with the error Finally //Cleanup End Try share|improve this answer edited Jun 15 '10 at 8:10 answered Jun 15 '10 at 8:01 codingbadger 25.8k45883 1 +1, Except that the curly braces aren't part of VB! –Martin Jun 15 '10 at 8:03 lol! This is very true - I was being extremely lazy there and copy and pasted from the OP. I have edited my answer to include both language examples. –codingbadger Jun 15 '10 at 8:07 @barry: why choose the try catch pattern? –CJ7 Jun 15 '10 at 8:08 1 @Craig There are so many reasons why you should use try cat
J2EEOther migration services Downloads Product Demos White Papers Videos/Audio Blogs About About ArtinSoft Our Technology Legacy Software MigrationBoard of Directors General FAQ JobsPress Room Mobilize.NET Customers http://www.artinsoft.com/vbc_errorhandling.aspx Our CustomersCase Studies Partners Partner Program Commercial Deployment Certification ProgramOur Partners Contact Us Mobilize.NET ES Tweet Error Handling Transformation Visual Basic 6.0 and the .NET languages have different error handling techniques; http://forums.devx.com/showthread.php?54248-On-Error-Goto-versus-Try-Catch-Fail while VB.NET is able to support a small subset of VB6 error handling keywords, C#.NET is not. Also, VB6 features in-code labels that can be used to create confusable “jump” patterns. on error These patterns are complex to read in VB6 and need to be removed from the resulting code for the sake of maintainability. The Visual Basic Upgrade Companion is able to remove unstructured “spaghetti code” and convert it to structured .NET statements. All unused labels are removed from the resulting code, plus the most commonly used “On Error” patterns are currently recognized and on error goto replaced for native .NET equivalent “try … catch” blocks. As part of the full conversion of the Visual Basic 6 Error handling schema (On Error ... Goto) to .NET, it is also necessary to convert the Err Object. The following VB6 extract shows a simple usage of the “On Error” statement to avoid a possible division by zero. The flow control of this source code extract will jump to the “ErrorHandler:” label in case there is an arithmetic error. Original VB6 source code Public Sub ErrorHandling(arg1 As Integer) On Error GoTo ErrorHandler Dim var1 As Integer var1 = 1 / arg1 MsgBox var1 MsgBox arg1 Exit Sub ErrorHandler: MsgBox Err.Description, , "Error" End Sub The Upgrade Wizard converts it using the same error management statements as in the original VB6 source code. VB.NET code generated by the Upgrade Wizard Public Sub ErrorHandling(ByRef arg1 As Short) On Error GoTo ErrorHandler Dim var1 As Short var1 = 1 / arg1 MsgBox(var1) MsgBox(arg1) Exit Sub ErrorHandler: MsgBox(Err.Description, , "Error") End Sub The Visual Basic Upgrade Companion is able to generate VB.NET source code using the .NET “Try Catch&
'On Error Goto' versus 'Try, Catch, Fail' If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Page 1 of 2 12 Last Jump to page: Results 1 to 15 of 22 Thread: 'On Error Goto' versus 'Try, Catch, Fail' Tweet Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 09-07-2002,06:00 PM #1 clarence_rollins Guest 'On Error Goto' versus 'Try, Catch, Fail' I'm not sure how 'Try, Catch, Fail' differs from the following 'On Error Goto' approach: Sub MyProcedure()