Q: validation instruction What are the ways to validate form data (in ASP.NET MVC and C#) such as input fields. I try jquery validator but failed. Are there other ways?

A: Here are several useful tutorials on ASP.NET MVC validation.

A: MVC v2 has DataAnnotation Validation Support, see Scott Gu's post on this topic.

A: ASP.NET MVC 2.0 beta has jQuery validator integrated.  Might be worth a look.

A: I recommend use MVC 2 RC, jQuery and jQuery.validate plugin. How it works you can read on Phil Haack's blog. Please, be careful. Phil wrote article in time of MVC 2 Beta. About issues with implementation on RC you can read here: ASP.NET MVC 2 RC client side validation not working.
