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    <p>I wrote my own ValidationService for MVC 1.0 by copying patterns from both xVal's DataAnnotationsRuleProvider and Microsoft's DataAnnotationsModelBinder (and Martijn's comments). The service interface is below:</p> <pre><code>public interface IValidationService { void Validate(object instance); IEnumerable&lt;ErrorInfo&gt; GetErrors(object instance); } public abstract class BaseValidationService : IValidationService { public void Validate(object instance) { var errors = GetErrors(instance); if (errors.Any()) throw new RulesException(errors); } public abstract IEnumerable&lt;ErrorInfo&gt; GetErrors(object instance); } </code></pre> <p>The service is a validation runner that walks the property tree of the object instance it receives and actually executes the validation attributes that it finds on each property, building a list of ErrorInfo objects when attributes are not valid. (I'd post the whole source but it was written for a client and I don't know yet if I'm authorized to do so.)</p> <p>You can then have your controllers, business logic services explicitly invoke validation when you are ready, rather than relying exclusively on the model binder for validation.</p> <p>There are a couple of other pitfalls that you should be aware of:</p> <ul> <li>The default DataTypeAttribute in data annotations doesn't actually do any data type validation, so you'll need to write a new attribute that actually uses xVal regular expressions (or something else) to perform server-side data type validation. </li> <li>xVal doesn't walk properties to create client-side validation, so you may want to make some changes there to get more robust client-side validation.</li> </ul> <p>If I am allowed and have time, I will try to make more source available...</p>
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    1. POASP.NET MVC: Is Data Annotation Validation Enough?
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    1. USJohn Bledsoe
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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