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namespace System.Web.ModelBinding {
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Linq;
public class ValidatableObjectAdapter : ModelValidator {
public ValidatableObjectAdapter(ModelMetadata metadata, ModelBindingExecutionContext context)
: base(metadata, context) {
}
public override IEnumerable<ModelValidationResult> Validate(object container) {
// NOTE: Container is never used here, because IValidatableObject doesn't give you
// any way to get access to your container.
object model = Metadata.Model;
if (model == null) {
return Enumerable.Empty<ModelValidationResult>();
}
IValidatableObject validatable = model as IValidatableObject;
if (validatable == null) {
throw new InvalidOperationException(
String.Format(
CultureInfo.CurrentCulture,
SR.GetString(SR.ValidatableObjectAdapter_IncompatibleType),
typeof(IValidatableObject).FullName,
model.GetType().FullName
)
);
}
ValidationContext validationContext = new ValidationContext(validatable, null, null);
return ConvertResults(validatable.Validate(validationContext));
}
private IEnumerable<ModelValidationResult> ConvertResults(IEnumerable<ValidationResult> results) {
foreach (ValidationResult result in results) {
if (result != ValidationResult.Success) {
if (result.MemberNames == null || !result.MemberNames.Any()) {
yield return new ModelValidationResult { Message = result.ErrorMessage };
}
else {
foreach (string memberName in result.MemberNames) {
yield return new ModelValidationResult { Message = result.ErrorMessage, MemberName = memberName };
}
}
}
}
}
}
}
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