Microsoft Web API Help page - how to create annotations for parameters

Question

Recently i've start playing with new web api help page functionality, that was recently added to web api project template. And i have a notice that some "Additional information" column is always 'none'.

After some looking at markup i found that this info should arrive from attributes

 <td class="parameter-annotations">
                    @if (parameter.Annotations.Count > 0)
                    {
                        foreach (var annotation in parameter.Annotations)
                        {
                            <p>@annotation.Documentation</p>
                        }
                    }
                    else
                    {
                        <p>None.</p>
                    }
                </td>

But what kind of attribute i should use, to populate additional information? Thanks

Answer 1

See this site for an example of how to add additional information.

It's basically annotating your model, so in your case it would be something like:-

public class Product
{
    /// <summary>
    ///  The id of the product
    /// </summary>
    [Required]
    public int Id { get; set; }

    /// <summary>
    /// The name of the product
    /// </summary>
    [MaxLength(50)]
    public string Name { get; set; }
}

Which would give you an output like this:-