AutoMapper Static Class Is Not Mapping List and Nested Entity-CodePudding

I am using static class for mapping my entities. But if I use the following code, it is not working for converting lists and nested entities;

public static class MapperUtil<TSource, TDestination>
{

    private static readonly Mapper _mapper = new Mapper(new MapperConfiguration(
        cfg =>
        {
            cfg.CreateMap<TDestination,TSource>().ReverseMap();
        }));

    public static TDestination Map(TSource source)
    {
        return _mapper.Map<TSource,TDestination>(source);
    }
}

But if I use the following code it works well.

 var mapper = new Mapper(new MapperConfiguration(cfg =>
 {
   cfg.CreateMap<List<User>, List<UserDto>>().ReverseMap();
 }));

 List<UserDto> userDto = mapper.Map<List<User>,List<UserDto>> (users);

Can anyone help me? (I am newbie). And is it good idea using static class for mapping? What is your solution for mapping as static class?

CodePudding user response：

You should remove List in CreateMap method and create map for your types:

 var mapper = new Mapper(new MapperConfiguration(cfg =>
 {
   cfg.CreateMap<User, UserDto>().ReverseMap();
 }));

Finally:

List<UserDto> userDto = mapper.Map<List<UserDto>>(users);

CodePudding user response：

if you are using generic type for mapping, try below code

public class Source<T> {
    public T Value { get; set; }
}

public class Destination<T> {
    public T Value { get; set; }
}

// Create the mapping
var configuration = new MapperConfiguration(cfg => cfg.CreateMap(typeof(Source<>), typeof(Destination<>)));