Following Domain Driven Design with MVVM/WPF

Posted by msfanboy on Stack Overflow See other posts from Stack Overflow or by msfanboy
Published on 2010-03-20T16:57:53Z Indexed on 2010/03/20 17:01 UTC
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domain

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design

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mvvm

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validation

Hello,

I have plain POCOs here and as INotifyPropertyChanged is a Interface for the Views need its implemented in the ViewModel not the Model.

Now I want to show validation errors in the View beside every textbox the user typed in data.

I do not want to implemented the IDataErrorInfo interface in my Models because lets assume I am not allowed to touch them as they come from another Service/Supplier.

I do not want to put my IsCustomerFirstNameLenthValid Method into the Model because I could not have access to it or I just dont want to pollute my Models with interface`s having nothing to do there!

How can I validate my naked POCO`s in the ViewModel and forward the results to the View by showing validation errors ?

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