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

        

Answer 1

I needed to return a serializable version of IPagedList<> with AutoMapper version 6.0.2 that supports the IMapper interface for ASP.NET Web API. So, if the question was how do I support the following:

//Mapping from an enumerable of "foo" to a different enumerable of "bar"...
var listViewModel = _mappingEngine.Map, PagedViewModel>(requestForQuotes);

Then one could do this:

Define PagedViewModel
Source: AutoMapper Custom Type Converter not working

public class PagedViewModel
{
    public int FirstItemOnPage { get; set; }
    public bool HasNextPage { get; set; }
    public bool HasPreviousPage { get; set; }
    public bool IsFirstPage { get; set; }
    public bool IsLastPage { get; set; }
    public int LastItemOnPage { get; set; }
    public int PageCount { get; set; }
    public int PageNumber { get; set; }
    public int PageSize { get; set; }
    public int TotalItemCount { get; set; }
    public IEnumerable Subset { get; set; }
}

Write open generic converter from IPagedList to PagedViewModel
Source: https://github.com/AutoMapper/AutoMapper/wiki/Open-Generics

public class Converter : ITypeConverter, PagedViewModel>
{
    public PagedViewModel Convert(IPagedList source, PagedViewModel destination, ResolutionContext context)
    {
        return new PagedViewModel()
        {
            FirstItemOnPage = source.FirstItemOnPage,
            HasNextPage = source.HasNextPage,
            HasPreviousPage = source.HasPreviousPage,
            IsFirstPage = source.IsFirstPage,
            IsLastPage = source.IsLastPage,
            LastItemOnPage = source.LastItemOnPage,
            PageCount = source.PageCount,
            PageNumber = source.PageNumber,
            PageSize = source.PageSize,
            TotalItemCount = source.TotalItemCount,
            Subset = context.Mapper.Map, IEnumerable>(source) //User mapper to go from "foo" to "bar"
        };
    }
}

Configure mapper

new MapperConfiguration(cfg =>
    {
        cfg.CreateMap();//Define each object you need to map
        cfg.CreateMap(typeof(IPagedList<>), typeof(PagedViewModel<>)).ConvertUsing(typeof(Converter<,>)); //Define open generic mapping
    });