How can I create a generic UniqueValidationAttribute in C# and DataAnnotation?

Question

I\'m trying to create a UniqueAttribute using the System.ComponentModel.DataAnnotations.ValidationAttribute

I want this to be generic as in I c

Answer 1

One problem I see already is that you can't instantiate types as parameters of attributes.

Attributes require that all arguments be compile-time constants. So the usage:

[Unique(new DataContext(),"Groups","name")]

won't compile. You may be able to omitt new DataContext() - but then I suspect your validation logic won't have information about the entity types to query.