Best way to validate ASP.NET controls ?

[Mukesh Kumar Gupta]

I have used various validation techniques for ASP.NET page controls, but still confused that what is the best way to do this, client side JavaScript validations, ASP.NET validation controls, full validations on server side or a combination of multiple techniques, If somebody have a link of online article to clarify this; please post that. Thank you in advance.

[CWIZO]

Use client and server side validation. The first prevents unnessecary request to the server, the second enshures that the data is really vaild. Q:What does the derived class in C# tell to it's parent? A:All your base are belong to us!