The new family of bound controls lets developers build data-driven
applications almost without writing a line of code at page level, but there's
more work to do to build really robust, fully featured controls.
With the new version of .NET Framework, developers can extend base controls
to build "powered" ones that satisfy particular needs that base controls
can't.
In this article you'll see how to extend the BoundField control adding
validation capabilities using ASP.NET validation controls. These controls
provide two ways of validation: server-side and client-side. The nice thing
about these validation controls is that they will do client-side validation
when they detect that the browser can (unless client-side validation has been
disabled), thus reducing roundtrips. An... (more)