Salut Andre,
That's how DP works - it does not replicate inheritable attribtues since
they are... wel inherited anyway, hence accessible when reflecting over
subclass (which is what proxy is).
The fact that the method for obtaining attribtues is flawed is really
unfortunate (see this post
http://geekswithblogs.net/sdorman/archive/2010/05/16/retrieving-custom-attributes-using-reflection.aspx)
Basically DP behavior is correct here, and the validation framework
you're using is flawed in my opinion. Perhaps use another validation
framework?
Krzysztof
On 15/07/2010 11:15 PM, André wrote:
Hi!
I'm using DynamicProxy 2.2 for Silverlight 3.0 to generate validation
based on DataAnnotations.
I've defined a class like this:
public class AutenticacaoViewModel
{
[Required(ErrorMessage = "O usuário é obrigatório.")]
[Display(Name = "", Description = "Informe o usuário.")]
public virtual string Usuario { get; set; }
[Required(ErrorMessage = "A senha é obrigatória.")]
[Display(Name = "", Description = "Informe a senha.")]
public virtual string Senha { get; set; }
[Required(ErrorMessage = "A unidade é obrigatória.")]
[Display(Name = "", Description = "Informe a unidade.")]
public virtual Contratos.EmpresaUnidade EmpresaUnidade { get;
set; }
}
The interceptor for this class uses some code to validate a property
given its attributes:
var property = invocation.Method.Name.Substring(4);
var @this = invocation.InvocationTarget;
Validator.ValidateProperty(invocation.Arguments[0], new
ValidationContext(@this, null, null) { MemberName = property });
The problem is, framework code can't retrieve validation attributes.
With some code I can see DP does copy target attributes to proxy:
autenticacao =
ValidationInterceptor.MakeNotifier<AutenticacaoViewModel>();
var x1 =
Attribute.GetCustomAttributes(autenticacao.GetType().GetProperty("Usuario"));
var y1 =
Attribute.GetCustomAttributes(autenticacao.GetType().GetProperty("Senha"));
var x2 =
autenticacao.GetType().GetProperty("Usuario").GetCustomAttributes(true);
var y2 =
autenticacao.GetType().GetProperty("Senha").GetCustomAttributes(true);
x1 and y1 holds a list of attributes, but x2 and y2 are empty.
Unfortunately, Validator.ValidateProperty() uses the second approach
(confirmed by Reflector).
Does anyone here knows how to solve this problem?
TIA
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