ASP.NET MVC Custom MetadataProvider

Question

I'm building a custom MetadataProvider and I'd like to access the actuall model value in the CreateMetadata method.

public class IcpMetadataProvider : AssociatedMetadataProvider
{

    protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName)
    {

        var metadata = new ModelMetadata(this, containerType, modelAccessor, modelType, propertyName);

        //Is null when the model is of reference type
        var model = metadata.Model;


        return metadata;
    }
}

When the current model value is of type string, the model value can be found in metadata.Model. But when the model is of reference type the value is null.

Or maybe is there any way to pass custom data to this method ?

murki · Accepted Answer · 2011-02-17 01:40:54Z

1

Quoting Brad Wilson, you need to "Call base.CreateMetadata so that you can get the ModelMetadata that’s filled with values from DataAnnotations, and then just supplement it with values from your own attributes."

Ref link: http://bradwilson.typepad.com/blog/2010/01/why-you-dont-need-modelmetadataattributes.html

answered Feb 17, 2011 at 1:40

murki

87912 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

ASP.NET MVC Custom MetadataProvider

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related