Model of MVVM is a separate class library, how to implement inotifypropertychanged and inotifydataerrorinfo?

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I have DataTransfterObjects (DTO) in separate layer so I think no need of model in wpf application. I only have View and viewmodel in the application.

Everything works fine but issue is how to implement INotifyPropertyChanged and INotifyDataErrorInfo in DTO. How to use functionalities of these two interfaces? How to make validations?

What I have tried:

I have three class libraries of BLL, DAL and DTO and a wpf application have ViewModel and View only, I am using DTO as a model in the wpf application. Now If I implement IDataErrorInfo for validations then will it work or I have to do more?

Posted 18-Sep-16 1:56am

sacpundir

Updated 19-Sep-16 1:57am

v3

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[no name] 18-Sep-16 8:10am

No it's not urgent at all. Why not try and inherit those interfaces? "Teach me programming in a forum posting" is not a question.

sacpundir 18-Sep-16 8:37am

nice suggestion thanks

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johannesnestler · Answer 1 · 2016-09-19T01:57:00

Solution 1

Change notifications (e.g. for bindings in wpf) should be implemented in a viewmodel - let the model alone... This would be MVVM - I don't mean you can not have a model-classes implemening these Interfaces - but in MVVM this would be a clear responsibillity of the ViewModel

Posted 19-Sep-16 1:57am

johannesnestler