IT:AD:ASP.NET:MVC:Views:Forms:Validation:Conditional
Types Needed:
- If Other Field is !Null
- If Other Field is Rendered
- If other Field is Requred
- Library to extend this library.
- Or this one
http://blogs.msdn.com/b/simonince/archive/2010/06/04/conditional-validation-in-mvc.aspx
http://www.beletsky.net/2012/01/using-aspnet-mvc-validation-mechanism.html
http://weblogs.asp.net/scottgu/archive/2008/10/16/asp-net-mvc-beta-released.aspx#five
Read again:
Disabling Validation:
http://msdn.microsoft.com/en-us/library/hh882339.aspx
An interesting project is: http://foolproof.codeplex.com/