Even though the Validation Application Block has been available since Enterprise Library 3.0 and now we are at Enterprise Library 4.1, hands-on labs are still a good thing for all the new developers who are using Enterprise Library for the first time.
The Microsoft Patterns & Practices folks just released the hands-on labs for the Validation Application Block, which IMHO is one of the best application blocks in Enterprise Library :) Grigori Melnik has the scoop that breaks the Validation Application Block Hands-On Labs as follows:
- The first 11 deal with a Windows Forms data processing application that takes the information entered by the user to populate and process business entities. The Validation Application Block is used to validate the created business objects before processing them in gradually more sophisticated ways.
- Starting with Lab 7, the Windows Forms validation–integration feature is used to directly validate the input for the form's controls.
- Labs 8 through 11 deal with the extensibility of the application block.
- Lab 12 shows how to use the ASP.NET validation-integration feature of the application block to validate the ASP.NET control's values, using a Web forms version of the simple data entry application from the previous labs.
- Finally, for Lab 13, the ASP.NET application works as a front-end for a Windows Communication Foundation (WCF) service while the WCF validation–integration feature of the application block is used to declaratively validate the service parameters on the server side.
You can download the validation application block hands-on labs here.
Here are a number of tutorials I wrote on the Validation Application Block over the years if you are looking for some resources.
Validation Application Block Tutorials
Check out the Validation Application Block and Unity Screencast as well.