Mega Code Archive
Create Custom Exception class
<![CDATA[
Option Strict On
Imports System
Public Class MyCustomException
Inherits System.ApplicationException
Public Sub New(ByVal message As String)
MyBase.New(message)
End Sub
End Class
Class Tester
Public Shared Function DoDivide(ByVal a As Double, ByVal b As Double) As Double
If b = 0 Then
Dim e As New DivideByZeroException( )
e.HelpLink = "http://www.rntsoft.com"
Throw e
End If
If a = 0 Then
Dim e As New _
MyCustomException("Can't have zero divisor")
e.HelpLink = "http://www.rntsoft.com"
Throw e
End If
Return a / b
End Function 'DoDivide
Shared Sub Main( )
Try
Console.WriteLine("Open file here")
Dim a As Double = 0
Dim b As Double = 5
Console.WriteLine("{0} / {1} = {2}", a, b, DoDivide(a, b))
Console.WriteLine("This line may or may not print")
Catch e As System.DivideByZeroException
Console.WriteLine("DivideByZeroException! Msg: {0}", e.Message)
Console.WriteLine("HelpLink: {0}", e.HelpLink)
Catch e As MyCustomException
Console.WriteLine("MyCustomException! Msg: {0}", e.Message)
Console.WriteLine("HelpLink: {0}", e.HelpLink)
Catch
Console.WriteLine("Unknown exception caught")
Finally
Console.WriteLine("Close file here.")
End Try
End Sub
End Class
Open file here
MyCustomException! Msg: Can't have zero divisor
HelpLink: http://www.rntsoft.com
Close file here.
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