Question

如果属性类型与同一属性名称不同，我如何忽略映射？默认情况下，它会抛出错误。

Mapper.CreateMap<EntityAttribute, LeadManagementService.LeadEntityAttribute>();

Model = Mapper.Map<EntityAttribute, LeadManagementService.LeadEntityAttribute>(EntityAttribute);

我知道一种方法来指定要忽略的属性名称，但这不是我想要的。

  .ForMember(d=>d.Field, m=>m.Ignore());

因为将来我可能会添加新属性。所以我需要忽略具有不同数据类型的所有属性的映射。

Answer 1

对于应忽略的属性，您应该使用ignore：

Mapper.CreateMap<EntityAttribute, LeadManagementService.LeadEntityAttribute>()
     ForMember(d=>d.FieldToIgnore, m=>m.Ignore());

Answer 2

您可以使用ForAllMembers()设置适当的映射条件：

Mapper.Initialize(cfg =>
{
    cfg.CreateMap<EntityAttribute, LeadEntityAttribute>().ForAllMembers(memberConf =>
    {
        memberConf.Condition((ResolutionContext cond) => cond.DestinationType == cond.SourceType);
    });
}

您也可以使用ForAllMaps()全球申请：

Mapper.Initialize(cfg =>
{
    // register your maps here
    cfg.CreateMap<A, B>();

    cfg.ForAllMaps((typeMap, mappingExpr) =>
    {
        var ignoredPropMaps = typeMap.GetPropertyMaps();

        foreach (var map in ignoredPropMaps)
        {
            var sourcePropInfo = map.SourceMember as PropertyInfo;
            if (sourcePropInfo == null) continue;

            if (sourcePropInfo.PropertyType != map.DestinationPropertyType)
                map.Ignore();
        }
    });
});

Answer 3

处理类型的所有属性的一种方法是使用.ForAllMembers（opt =＆gt; opt.Condition（IsValidType）））。我已经使用了新的语法来使用AutoMapper，但它应该可以使用旧的语法。

using System;
using AutoMapper;

namespace TestAutoMapper
{
    class Program
    {
        static void Main(string[] args)
        {
            var mapperConfiguration = new MapperConfiguration(cfg => cfg.CreateMap<Car, CarDto>()
                .ForAllMembers(opt => opt.Condition(IsValidType))); //and how to conditionally ignore properties
            var car = new Car
            {
                VehicleType = new AutoType
                {
                    Code = "001DXT",
                    Name = "001 DTX"
                },
                EngineName = "RoadWarrior"
            };

            IMapper mapper = mapperConfiguration.CreateMapper();
            var carDto = mapper.Map<Car, CarDto>(car);
            Console.WriteLine(carDto.EngineName);

            Console.ReadKey();
        }

        private static bool IsValidType(ResolutionContext arg)
        {
            var isSameType = arg.SourceType== arg.DestinationType; //is source and destination type is same?
            return isSameType;
        }
    }

    public class Car
    {
        public AutoType VehicleType { get; set; } //same property name with different type
        public string EngineName { get; set; }
    }

    public class CarDto
    {
        public string VehicleType { get; set; } //same property name with different type
        public string EngineName { get; set; }
    }

    public class AutoType
    {
        public string Name { get; set; }
        public string Code { get; set; }
    }
}

automapper - 如果属性类型与同一属性名称不同，则忽略映射 - C＃

3 个答案: