Throwing an exception from a property

[eric13]

I have a collection of business objects bound to a form with a bindingsource and a navigator.

I want to throw an exception (some message) to the owning application when a user attempts to set a property with invalid data. What is the proper way to throw the exception from the property and handle it on the owning app.

 

[vis781]

Exactly as you have said in your post...

Throw New InvalidOperationException(..)

You can ofcourse create your own custom exception class if you want the exception to be a bit more personalised.

 

[jmcilhinney]

It would more correctly be an ArgumentException, but as vis781 says, throwing an exception is throwing an exception. There's only one way to do it.

 

[eric13]

thanks for your solutions,

how would you handle it on the owning side?

 

[jmcilhinney]

You use a Try...Catch block and then it's completely up to the caller what to do if an exception is caught. It would depend on a large number of factors.