Automapper uri to string convention

Question

Using Automapper, what is the best way to setup a global convention such that all System.Uri properties are converted to a string that represents the AbsoluteUri property?

Ideally, I'd like to have a null System.Uri resolve to a value of String.Empty rather than null.

Answer 1

Setup the map:

Mapper.CreateMap<System.Uri, string>().ConvertUsing<UriToStringConverter>();

Create the TypeConverter class:

public class UriToStringConverter : ITypeConverter<System.Uri, string>
{
    public string Convert(ResolutionContext context)
    {
         if (context.SourceValue == null)
         {
            return String.Empty;
         }

         return ((System.Uri)context.SourceValue).AbsoluteUri;
    }
}