Question

I want to access DataAnnotation‘s GroupName in MVC view.
For example, let’s say one of my model properties is like

[Display(Order = 1, GroupName= "Passport Detail", Name = "Passport #")]
[Required()]
[StringLength(20)]
public string PassportNo { get; set; }

Now, How can I access the GroupName in the view?
I want to achieve something like this in MVC.

Answer 1

I found a workaround solution.
We can achive this by using DataAnnotationsModelMetadataProvider.
For Ex.

public class MetadataProvider : DataAnnotationsModelMetadataProvider
{
    protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes,
                                                    Type containerType, Func<object> modelAccessor,
                                                    Type modelType, string propertyName)
    {
        var metadata = base.CreateMetadata(attributes, containerType, modelAccessor, modelType, propertyName);

        var disp = attributes.OfType<DisplayAttribute>().FirstOrDefault();
        if (disp != null)
        {
            if (disp.GroupName != null)
                metadata.AdditionalValues.Add("GroupName", disp.GroupName);
        }

        return metadata;
    }
}

In the mvc view we can use AdditionalValues as usual.