如何在.Net core 2.2中为自定义属性配置AutoMapper？

Question

I'm setting up AutoMapper for my Asp.Net core 2.2 application. How to configure this for custom properties?

-> Added "AutoMapper.Extensions.Microsoft.DependencyInjection (6.0.0)" NuGet package to the solution.

-> Added "services.AddAutoMapper();" to "ConfigureServices" method in my startup.cs file.

Mapping profile file:

    using AutoMapper;

    namespace Api.AutoMapperProfiles
    {
        public class MappingProfile : Profile
        {
            public MappingProfile()
            {
                var map = CreateMap<System.Data.DataRow, OneViewModel>();
                map.ForAllOtherMembers(opt => opt.Ignore());
                map.ForMember(d => d.one, o => o.MapFrom(s => s["one"]));
                map.ForMember(d => d.two, o => o.MapFrom(s => s["two"]));
            }
        }
    }

---

Controller file:

  List<OneViewModel> pr = _mapper.Map<IDataReader, List<OneViewModel>>(ds.Tables[0].CreateDataReader());

I expect a list of "OneViewModel" from the datatable. But I get an error that "Capacity" property is not mapped. And there is not capacity property in my datatable or model.

Answer 1

In your MappingProfile, you are configuring the mapping for System.Data.DataRow to OneViewModel . What you should be configuring is, IDataReader to OneViewModel .

// configure mapping, hope you get the idea
var map = Mapper.CreateMap<IDataReader, CustomerModel>()
  .ForMember(dest => dest.one,
      opt => opt.MapFrom(src => src.GetValue(src.GetOrdinal("one")).ToString())))

// use
using (DataTableReader dr = ds.Tables[0].CreateDataReader())
{
    if (dr.HasRows)
    {
       var pr = AutoMapper.Mapper.Map<IDataReader, IList<OneViewModel>>(dr);
    }
}