For an assignment for school we had to use MVVM, so after evaluating some of the most popular frameworks, I’ve decided to use your piece of art. Thanks to your extensive articles and well-commented source code, I had little trouble getting everything up and running. I do want to point out one thing that I believe is wrong in one of your articles (http://www.codeproject.com/KB/WPF/CinchII.aspx#validationRules). Here you give an example how to add rules to simple types, but a simple type like Int32 hasn’t got a .AddRule method ofcourse, so instead of quantity.AddRule(..), I think it should be this.AddRule(…)

If I’m mistaken, excuse me.

Thanks for bringing out such full-featured framework,

Dieter

PS: Sorry for my english

Thanks,
Nicola

Great comments.

The Rules one, I think I may look into that. If you have some code / ideas Id love to see them. But I’ll have a look when I have some time. That said the standard way to do validation is to have the rules hard coded into the Model using what Microsoft suggest with the IDataErrorInfo implementation.

http://blogs.msdn.com/wpfsdk/archive/2007/10/02/data-validation-in-3-5.aspx

Which of course means we have the same problem. So from that point of view I do not feel too bad about my approach. But Ill look into it, or if you have something in mind send it my way, Id love to see it.

As far as ValidatingObject / INPC goes, yeah I think if people want an ObservableObject they can add there own its not so much work. As you say its down to personal taste.