About advancing error handling from VB6 to VB .NET
In VB6, error handling is performed using the statements On Error Goto and On Error Resume Next. VB .NET continues to honor these VB6 statements for legacy purposes but a better mechanism exists for error handling. The preferred VB .NET error handling mechanism is by using Try Catch Finally and Throw Exception statements. For a valuable resource that ArcGIS developers can learn from, see How to use structured exception handling in Visual Basic .NET or in Visual Basic 2005 on the Microsoft Support Web site.
The following is a simple code example of VB6 error handling statements:
On Error GoTo ErrorHandler ... Exit Sub ErrorHandler: MsgBox CStr(Err.Number) & " " & Err.Description
The following is a simple code example of VB .NET error handling statements:
[VB.NET]
Try
If x = 0 Then
Throw New System.DivideByZeroException
End If
Catch ex As Exception
MessageBox.Show(ex.InnerException.ToString)
Finally
'Code to do any final clean up.
'This sections always executes.
End Try
See Also:
Migrating from VB6 to VB.NETGeneral steps for migrating from VB6 to VB.NET
Development licensing | Deployment licensing |
---|---|
ArcGIS for Desktop Basic | ArcGIS for Desktop Basic |
ArcGIS for Desktop Standard | ArcGIS for Desktop Standard |
ArcGIS for Desktop Advanced | ArcGIS for Desktop Advanced |
Engine Developer Kit | Engine |