传统的AutoMap需要给每一个转换定义规则，如果有很多实体就会很麻烦，所以做了一个扩展类用来简化步骤

使用

//使用
实体1的结果.MapTo<实体2>();//例如 有两个实体
public class User
{public int Id { get; set; }
}
public class UserDto
{public int Id { get; set; }
}
//转换
var user=new User(){Id=1};
user.MapTo<UserDto>();//定制规则
user.MapTo<User, UserDto>(opts =>
{//转换前opts.BeforeMap((src, dest) =>{dest.Id = src.Id;});//转换后opts.AfterMap((src, dest) =>{dest.Id = src.Id;});
});

扩展类

using AutoMapper;
using System.Collections.Concurrent;namespace Easy.Common.Core
{/// <summary>/// automap扩展类/// </summary>public static class AutoMapperExtensions{private static readonly ConcurrentDictionary<string, IMapper> MapperCache = new ConcurrentDictionary<string, IMapper>();private static IMapper GetOrCreateMapper(Type sourceType, Type destinationType){var key = $"{sourceType.FullName}_{destinationType.FullName}";if (!MapperCache.TryGetValue(key, out var mapper)){var config = new MapperConfiguration(cfg =>{cfg.CreateMap(sourceType, destinationType);});mapper = config.CreateMapper();MapperCache[key] = mapper;}return mapper;}/// <summary>/// 实体转换/// </summary>/// <typeparam name="TDestination"></typeparam>/// <param name="source"></param>/// <returns></returns>public static TDestination MapTo<TDestination>(this object source){var mapper = GetOrCreateMapper(source.GetType(), typeof(TDestination));return mapper.Map<TDestination>(source);}/// <summary>/// 列表转换/// </summary>/// <typeparam name="TSource"></typeparam>/// <typeparam name="TDestination"></typeparam>/// <param name="source"></param>/// <returns></returns>public static List<TDestination> MapListTo<TSource, TDestination>(this object source){var mapper = GetOrCreateMapper(source.GetType(), typeof(TDestination));return mapper.Map<List<TDestination>>(source);}/// <summary>/// 扩展转换，指定某些字段转换规则/// </summary>/// <typeparam name="TSource"></typeparam>/// <typeparam name="TDestination"></typeparam>/// <param name="source"></param>/// <param name="opts"></param>/// <returns></returns>public static TDestination MapTo<TSource, TDestination>(this TSource source, Action<IMappingOperationOptions<TSource, TDestination>> opts){var mapper = GetOrCreateMapper(typeof(TSource), typeof(TDestination));return mapper.Map(source, opts);}}
}