Throw

[pbala]

What is the Usage of Throw in a Catch File????

[nukefusion]

Do you mean code like the following?

Try
    ' Do stuff here
Catch DivByZero As System.DivideByZeroException
    ' Catch divide by zero exceptions
Catch OtherException As Exception
    Throw OtherException
End Try

It's called rethrowing the exception and you might do that if you decide that the currenty try - catch block doesn't know how to deal with that particular exception

In this case rethrowing the exception causes it to be passed up to the next try - catch block in the chain. So, say the above code was a function you had written called DoStuff() and you've wrapped the call to DoStuff() in another try - catch block, the rethrown exception would get passed back to that block.

[Frinavale]

Re-throwing an exception isn't the only use for a Throw.

If you are developing a control and you need to inform the calling code that something has gone wrong you could throw an exception.

For instance, if your Person object requires a name before doing something with it, you could throw an exception if the calling code attempts to use the Person object before setting a name. In this case, designing a custom exception is a good idea to indicate that it is a problem originating from the Person object.

Check out this article for more information on designing a custom exception.

[sashi]

Hi there,

Error handling!!