What is Try- Catch –Finally Exception Handling?

Exceptions are Runtime errors that occur when an unexpected process causes the program to abort. Such kind of situations can be kept at bay using Exception Handling. By looking for potential problems in the code / entity life cycle, we can handle most of the errors that may encountered. As a result the application to continue to run without being dogged by errors. VB.NET supports Structured exception handling by using Try...Catch...Finally

The following code sample demonstrates how to use Try-Catch-Finally exception handling.

Module Module1
Sub Main()
Dim a=0, b=1, c As Integer
Try
c=b / a
'the above line throws an exception
System.Console.WriteLine("C is " & c)
Catch e As Exception
System.Console.WriteLine(e)
'catching the exception
End Try
System.Console.Read()
End Sub
End Module

The output of the above code displays a message stating the exception. The reason for the exception is because any number divided by zero is infinity.

Written by Sandeep Mogulla, Webmaster at www.startvbdotnet.com

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