I'm trying to change the default error message in a Silverlight DataGrid when the input is in an incorrect format. For example, you type letters into a numerical field. As you tab away, it says "input is not in a correct format." I've seen how to fix this, and that is to put a validation attribute on it with a custom error message. Problem is, my object is coming from RIA services. It seems to ignore my custom error message from my validation attributes. Is there something I need to do to expose this? Thanks in advance.
Sounds like you don't have the metadata set up for your objects. using metadata for validation in silverlight This will create it for you and bring the annotation to the silverlight project.