HumanizerMetadataProvider.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web.Mvc;

namespace Humanizer.MvcSample
{
    public class HumanizerMetadataProvider : DataAnnotationsModelMetadataProvider
    {
        protected override ModelMetadata CreateMetadata(
            IEnumerable<Attribute> attributes,
            Type containerType,
            Func<object> modelAccessor,
            Type modelType,
            string propertyName)
        {
            var propertyAttributes = attributes.ToList();
            var modelMetadata = base.CreateMetadata(propertyAttributes, containerType, modelAccessor, modelType, propertyName);

            if (IsTransformRequired(modelMetadata, propertyAttributes))
                modelMetadata.DisplayName = modelMetadata.PropertyName.Humanize();

            return modelMetadata;
        }

        private static bool IsTransformRequired(ModelMetadata modelMetadata, IList<Attribute> propertyAttributes)
        {
            if (string.IsNullOrEmpty(modelMetadata.PropertyName))
                return false;

            if (propertyAttributes.OfType<DisplayNameAttribute>().Any())
                return false;

            if (propertyAttributes.OfType<DisplayAttribute>().Any())
                return false;

            return true;
        }
    }
}