ValidationContext

.NET 4 和Silverlight 中可以使用以下方法:

public static void Validate(this Entity entity)

{

// prepare the result

var validationResults = new List<ValidationResult>();

// create a validation context

var validationContext = new ValidationContext(entity, null, null);

// validate

Validator.TryValidateObject(entity, validationContext, validationResults);

// reset the validation errors of the entity

entity.ValidationErrors.Clear();

foreach (var error in validationResults)

entity.ValidationErrors.Add(error);

}

.NET 3.5中的方法：

public static class EntityValidator

{

public static IEnumerable<ErrorField> GetErrors(object instance)

{

var t = instance.GetType();

var typeDescriptor = new AssociatedMetadataTypeTypeDescriptionProvider(t).GetTypeDescriptor(t);

return from prop in typeDescriptor.GetProperties().Cast<PropertyDescriptor>()

from attribute in prop.Attributes.OfType<ValidationAttribute>()

where !attribute.IsValid(prop.GetValue(instance))

select new ErrorField(prop.Name, attribute.FormatErrorMessage(string.Empty));

}

[Serializable]

public class ErrorField

{

public string ID { get; set; }

public string Msg { get; set; }

public ErrorField(string id, string msg)

{

this.ID = id;

this.Msg = msg;

}

巴特西