How does xval 2.0 work

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So have others Stephen Walther , Emad Ibrahim. I managed to get a few spare days this last week, so I decided to try and formalize lots of these ideas into something solid that you can actually use in real production code — something more than just another throwaway blog post.

So here it is: xVal, an open-source project hosted on CodePlex. It guides you to fit them both into ASP. The current version on Codeplex — version 0.

I also have plans to improve the internationalization somewhat to let you get error messages in other languages without having to specify them explicitly. It ensures that the rules will be enforced consistently, regardless of whether the UI coder remembers them or not. It throws a special type of exception, RulesException defined in the xVal assembly that passes structured error information back to the caller.

Now, because we already have Html. ValidationMessage helpers in the view, our error messages will appear:. This is the essence of server-side validation. You validate requested operations, both in terms of model properties and arbitrary business rules expressed in C code, and if anything is bad, you put the error information into ModelState and then re-render the view.

The clever bit happens when we want to add client-side validation. NET client-side validation and jQuery Validation. Add jquery. Improve this question. Add a comment. Active Oldest Votes.

Improve this answer. The numbers returned by h2o. The only value that uses the CV models is h2o. Someone needs to put that into the help page. Lauren Lauren 1 1 silver badge 5 5 bronze badges. Sign up or log in Sign up using Google.

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