On Error Goto Visual Basic .net
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J2EEOther migration services Downloads Product Demos White Papers Videos/Audio Blogs About About ArtinSoft Our Technology Legacy Software MigrationBoard of Directors http://www.artinsoft.com/vbc_errorhandling.aspx General FAQ JobsPress Room Mobilize.NET Customers 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; while VB.NET is able to support a small subset of VB6 error handling keywords, C#.NET is not. Also, VB6 on error features in-code labels that can be used to create confusable “jump” patterns. 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 on error goto removed from the resulting code, plus the most commonly used “On Error” patterns are currently recognized and 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