ASP.NET MVC - How do I implement validation when using Data Repositories? (Visual Basic)?

Though it is meaningful to do validations in server side and client side manually I would say one can go with open source validation Frameworks such as XVal .

Create a partial class of your user model and add in validation for your inputs. If you already have html helpers created for validation in your view (usually done authomatically when creating a new strongly typed view) then you can just place a try catch statement in your controller to catch the errors and pass them back to the view through the modelstate.

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