AutoMapper学习笔记

进入公司后学习到的东西，之前记录在github上 现在搬运过来

AutoMapperDemo

需要安装两个包

• AutoMapper
• AutoMapper.Extensions.Microsoft.DependencyInjection //需要依赖注入AutoMapper，需要下载该包。

在Startup中添加AutoMapper：

public void ConfigureServices(IServiceCollection services)
{
    //添加对AutoMapper的支持
    services.AddAutoMapper();
}

创建AutoMapper映射规则,新建一个config类,以及两个实体对象, User和UserDto

    public class Config:Profile
    {
        public Config()
        {
            //CreateMap(typeof(User), typeof(UserDto));
            CreateMap<User, UserDto>().
                ForMember(dest => dest.Sing, 
                opt => 
                opt.MapFrom(src => src.Sex == 'f' ? "画画" : "打老虎"));
        }
    }

使用方式.

        private IMapper _mapper;
        public ValuesController(IMapper mapper)
        {
            _mapper = mapper;
        }
        
        public ActionResult<IEnumerable<UserDto>> Get()
        {
            List<User> userList = new List<User>()
            {
                    new User() {
                              Id = 1,
                              Age = 12,
                              ClassName = "五年级",
                              Name = "大大大",
                              Sex = 'f'
                     },
                     new User() {
                              Id = 2,
                              Age = 12,
                              ClassName = "五年级",
                              Name = "大大大",
                              Sex = 'f'
                     },
                      new User() {
                              Id = 3,
                              Age = 12,
                              ClassName = "五年级",
                              Name = "大大大",
                              Sex = 'm'
                     },
                       new User() {
                              Id = 4,
                              Age = 12,
                              ClassName = "五年级",
                              Name = "大大大",
                              Sex = 'm'
                     }
            };
            AutomapperDemo.Model.User user = new User()
            {
                Id = 1,
                Age = 12,
                ClassName = "五年级",
                Name = "大大大",
                Sex = 'f'
            };
            //var model = _mapper.Map<UserDto>(user);
            var model = _mapper.Map<List<UserDto>>(userList);
            return model;
        }