Pro Business Applications with Silverlight 5

Data Validation

One of the most important roles in a typical data entry form is to notify the user of any problems with the data that has been entered. Invalid data in a business system can have major consequences for the business, so effective validation of data is vital to reduce the number of data entry mistakes that make it into the system. It's impossible to catch all errors, but you want to minimize the number of them as much as possible, and ensure that almost all the data entered into the system is correct and accurate. In Chapter 4, we looked at how you can decorate entities and their properties exposed by RIA Services with validation attributes. These attributes are replicated by the RIA Services code generator on the corresponding ...