Can Automapper map a paged list?

Question

I'd like to map a paged list of business objects to a paged list of view model objects using something like this:

var listViewModel = _mappingEngine.Map<IPagedList<RequestForQuote>, IPagedList<RequestForQuoteViewModel>>(requestForQuotes); 

The paged list implementation is similar to Rob Conery's implementation here: http://blog.wekeroad.com/2007/12/10/aspnet-mvc-pagedlistt/

How can you setup Automapper to do this?

Answer 1

Using jrummell's answer, I created an extension method that works with Troy Goode's PagedList. It keeps you from having to put so much code everywhere...

    public static IPagedList<TDestination> ToMappedPagedList<TSource, TDestination>(this IPagedList<TSource> list)     {         IEnumerable<TDestination> sourceList = Mapper.Map<IEnumerable<TSource>, IEnumerable<TDestination>>(list);         IPagedList<TDestination> pagedResult = new StaticPagedList<TDestination>(sourceList, list.GetMetaData());         return pagedResult;      } 

Usage is:

var pagedDepartments = database.Departments.OrderBy(orderBy).ToPagedList(pageNumber, pageSize).ToMappedPagedList<Department, DepartmentViewModel>(); 

Answer 2

AutoMapper does not support this out of the box, as it doesn't know about any implementation of IPagedList<>. You do however have a couple of options:

1. Write a custom IObjectMapper, using the existing Array/EnumerableMappers as a guide. This is the way I would go personally.

2. Write a custom TypeConverter, using:

   Mapper     .CreateMap<IPagedList<Foo>, IPagedList<Bar>>()     .ConvertUsing<MyCustomTypeConverter>(); 

   and inside use Mapper.Map to map each element of the list.