List of what type of exceptions thrown? [Resolved]

[salvelinus]

Another general question. Is there a list of what type of exceptions can be thrown by controls, or do you have to look up individual methods? I.e., a list of all exceptions that can be thrown by combobox methods, another for ado connection objects, etc?

[Edneeis]

I don't believe there is a list but all Exceptions should inherit from the Exception object. The closest thing is to do a search in the ObjectBrowser. Pull up the ObjectBrowser from the View menu and click the search icon (it has a pair of binoculars on it). Then search for 'Exception' with the 'Match Substring' option and in 'Selected Components'. That should give you most exception types.

[salvelinus]

Thanks again. If I catch all the listed exceptions, do I still need a generic catch statement?

[Edneeis]

If you catch Exception then it will catch all since they all derive from Exception. You really only need to list other types if you want to handle them differently.

[salvelinus]

Yes, that's what I'm doing. Do I still need the generic in that case?

[Edneeis]

If you are using Exception then you are using the generic since Exception is the generic type.

[salvelinus]

Sorry, guess I'm not being clear.
Say I have:

Try
'...some code here, maybe opening a connection
catch ex as oledbexception
'...handling code
catch ex as invalidoperationexception
'...handling code
end try

and those are the only two exceptions listed in help for opening the connection, do I still need
catch ex as exception
after the first two.

[Edneeis]

Its not a must but it is always good to have a catch all.