.Net Core 中使用AutoMapper进行对象映射

　　官网：http://automapper.org/

　　文档：https://automapper.readthedocs.io/en/latest/index.html

　　GitHub：https://github.com/AutoMapper/AutoMapper/blob/master/docs/index.rst

⒈安装相关依赖

　　AutoMapper 

　　AutoMapper.Extensions.Microsoft.DependencyInjection

⒉在Startup中添加AutoMapper

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

            //添加对AutoMapper的支持
            services.AddAutoMapper(cfg => 
            {
                cfg.AddProfile<AutoMapperConfig>();
            }, AppDomain.CurrentDomain.GetAssemblies());
        }

⒊使用配置文件创建AutoMapper映射规则

using AutoMapper;
using AutoMapperTest.Entities;
using System;
using System.Collections.Generic;
using System.Text;

namespace AutoMapperTest.AutoMapper
{
    public class AutoMapperConfig:Profile
    {
        public AutoMapperConfig()
        {
            CreateMap<UsersInputDto, Users>().ForMember(d => d.username, u => u.MapFrom(s => s.uname))    //属性名称映射
                                   .ForMember(d => d.password, u => u.MapFrom(s => s.pwd))  //属性名称映射
                                   .ForMember(d => d.age, u => u.Condition(s => s.age >= 0 && s.age <= 120)) //对一些属性做映射判断
                                   .BeforeMap((dto, ent) => ent.fullname = dto.firstname + "_" + dto.lastname)   //对一些属性做映射前处理
                                   ;
        }
    }
}

⒋在代码中使用AutoMapper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using AutoMapperTest.Entities;
using Microsoft.AspNetCore.Mvc;

namespace AutoMapperCore.Controllers
{
    public class UsersController : Controller
    {
        private readonly IMapper _mapper;
        public UsersController(IMapper mapper)
        {
            this._mapper = mapper;
        }
        public IActionResult Index()
        {
            UsersInputDto input = new UsersInputDto()
            {
                id = 1, firstname = "fan", lastname = "qi", uname = "fanqisoft", pwd = "admin", enabled = 1
            };
            
            Users users = _mapper.Map<Users>(input);
            return View();
        }
    }
}