VB.NET On Error GoTo
|BLBS^ |On Error GoTo|BLBE^ | statements is an example of Vb.Net's |BLBS^ |Unstructured Exception Handling|BLBE^ | . VB.NET has two types of Exception handling . |BLBS^ |Structured Error Handling|BLBE^ | and |BLBS^ |Unstructured Error handling|BLBE^ | . VB.NET using Try..Catch statement for Structured Error handling and On Error GoTo statement is using for Unstructured Error handling.Error GoTo redirect the flow of the program in a given location.
On Error Resume Next - whenever an error occurred in runtime , skip the statement and continue execution on following statements.
Take a look at the following program
VB.NET Source Code
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
Dim result As Integer
Dim num As Integer
num = 100
result = num / 0
MsgBox("here")
End Sub
End Class
when u execute this program you will get error message like Arithmetic operation resulted in an overflow .
See the program we put an On Error GoTo statement.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
On Error GoTo nextstep
Dim result As Integer
Dim num As Integer
num = 100
result = num / 0
nextstep:
MsgBox("Control Here")
End Sub
End ClassWhen you execute the program you will get the message box "Control Here" . Because the On Error statement redirect the exception to the Label statement.
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