Validation of your data is a requirement for almost every application. By using validation, you make sure that no invalid data is (eventually) persisted in your datastore. When you don't implement validation, there is a risk that a user will input wrongly formatted or plain incorrect data on the screen and even persist this data in your datastore. This is something you should definitely avoid.
In this recipe, we'll learn about implementing client-side validation on the bound fields in the UI.
To get ready for this recipe, you can either use the code from one of the previous recipes or use the provided starter solution in the
Chapter04/SilverlightBanking_Validation_Starter folder in the code bundle available ...