How to use Value Converters for Collection properties with AutoMapper

Question

Value Converters can be used to define conversion scoped to a single map:

public class CurrencyFormatter : IValueConverter<decimal, string> {
    public string Convert(decimal source, ResolutionContext context)
        => source.ToString("c");
}

var configuration = new MapperConfiguration(cfg => {
   cfg.CreateMap<Order, OrderDto>()
       .ForMember(d => d.Amount, opt => opt.ConvertUsing(new CurrencyFormatter()));
   cfg.CreateMap<OrderLineItem, OrderLineItemDto>()
       .ForMember(d => d.Total, opt => opt.ConvertUsing(new CurrencyFormatter()));
});

Is it possible to rely on the existing collection mapping functionality, but define a Value Converter for the mapping of the collection items?

cfg.CreateMap<OrderLineItem, OrderLineItemDto>()
    .ForMember(d => d.TotalCollection, /* what to specify here, so that the individual items mapped are using a converter */);

I know I could specify a Value Converter that handles ICollection<decimal> to ICollection<string> or similar, but that's not really elegant (and I also do not want to specify a global type mapping decimal to string).

question from:https://stackoverflow.com/questions/65835719/how-to-use-value-converters-for-collection-properties-with-automapper

Answer 1

Waitting for answers