我在类中具有默认构造函数以提供值automapper的属性时如何进行映射？

Question

我想创建从UserDto到用户实体的映射，请帮助我如何实现此目标。我在用户实体中具有GeoLocation属性，如何映射这些属性。有人可以举例给出解决方案吗？

我正在使用AutoMapper程序包：https://www.nuget.org/packages/AutoMapper/

我的用户实体类：

public class User
    {
        public string Id { get; set; }

        public string Name { get; set; }

        public GeoLocation PurchaseLocationCoordinates { get; set; }
    }

我的Dto班级：

public class UserDto
    {
        public string Id { get; set; } = Guid.NewGuid().ToString();

        public string Name { get; set; }

        public string PurchaseLocationLatitude { get; set; }

        public string PurchaseLocationLongitude { get; set; }
    }

GeoLocation类：

public class GeoLocation
    {
        public GeoLocation(double lon, double lat)
        {
            Type = "Point";
            if (lat > 90 || lat < -90) { throw new ArgumentException("A latitude coordinate must be a value between -90.0 and +90.0 degrees."); }
            if (lon > 180 || lon < -180) { throw new ArgumentException("A longitude coordinate must be a value between -180.0 and +180.0 degrees."); }
            Coordinates = new double[2] { lon, lat };
        }

        [JsonProperty("type")]
        public string Type { get; set; }
        [JsonProperty("coordinates")]
        public double[] Coordinates { get; set; }

        public double? Lat() => Coordinates?[1];
        public double? Lon() => Coordinates?[0];
    }

映射：

CreateMap<UserDto, User>();

Answer 1

您可以参考此代码：

 var config = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap<UserDto, User>()
    .ForMember(x => x.PurchaseLocationCoordinates, opt => opt.MapFrom(model => model));
                cfg.CreateMap<UserDto, GeoLocation>()
                 .ForCtorParam("lon", opt => opt.MapFrom(src => src.PurchaseLocationLongitude))
                  .ForCtorParam("lat", opt => opt.MapFrom(src => src.PurchaseLocationLatitude));
            });
            UserDto userdto = new UserDto()
            {
                PurchaseLocationLongitude = "80.44",
                PurchaseLocationLatitude = "34.56"
            };
            IMapper iMapper = config.CreateMapper();
            var user = iMapper.Map<UserDto, User>(userdto);