Comments on: Entity framework 4 – Part 5 – Validation using Data Annotations

By: Arjen den Hartog

Arjen den Hartog — Fri, 10 Dec 2010 11:29:05 +0000

It seems that only the RequiredAttribute is validated when Validator.TryValidateObject(entity, vc, validationResults) is called.

To validate all properties call Validator.TryValidateObject(entity, vc, validationResults, TRUE)

By: Daniel Wertheim

Daniel Wertheim — Tue, 23 Mar 2010 19:49:04 +0000

I haven’t looked in to this, I would check this with Julie Lerman: http://thedatafarm.com/blog/

//Daniel

By: Shimmy

Shimmy — Tue, 23 Mar 2010 15:41:10 +0000

I am using EF to generate the model, no POCOs.
Is there a way I can wire it up with DataAnnotations as well, e.g. by using Metadata classes etc. with WPF?

By: EL Guapo

EL Guapo — Wed, 10 Feb 2010 18:44:16 +0000

You want the rules in the domain, but the rules in fact are in the database. Your column has a maximum width. Your column has a definition of whether it is nullable or not. You may choose to write your own rules in your domain and pretend that’s all you have to do, but then you are responsible for making sure they are in sync with the database. Sounds like work to me.

You said it is possible to generate the data annotations… how so? I do not see how it is done.

By: Daniel Wertheim

Daniel Wertheim — Wed, 10 Feb 2010 17:19:18 +0000

Yes it’s possible but Why should they be generated? I like to define my conceptual model of the domain in the code, and that’s where I want the rules.

//Daniel

By: EL Guapo

EL Guapo — Wed, 10 Feb 2010 14:38:22 +0000

Why can’t the EF generate the validation data annotations for you? Required and max length are determined by the DB and known by EF and should be generated!

By: Entity validaton using Custom Data Annotation attributes « Daniel Wertheim

Entity validaton using Custom Data Annotation attributes « Daniel Wertheim — Thu, 19 Nov 2009 23:17:17 +0000

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