Otherwise, the Summary Page will automatically display whichever pivot item was showing before the navigation to the Fillup Page.
In addition, business rule validation is also implemented.
This section describes one approach to validating data entry input, but there are numerous ways to perform validation.
For example, Silverlight provides support for complex validation scenarios. By default, pressing the Back button causes backward navigation.
If parsing fails, a Message Box is displayed indicating the failure to the user.
If parsing succeeds, the code calls the Save Fillup method, passing it an error callback.
Validates On Exceptions property, as documented in the Silverlight Data Binding topic.