On Error GoTo statements is an example of Vb.Net's Unstructured Exception
Handling . VB.NET has two types of Exception
handling . Structured Error Handling and Unstructured Error handling . 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 Class
When you execute the program you will get the message box "Control Here" . Because the On Error statement redirect the exception to the Label statement.
