首先需要在NuGet中引用AutoMapper的类库
install-package AutoMapper
install-package AutoMapper.Extensions.Microsoft.DependencyInjection
然后创建好要进行转换的类
public class User
{
public int ID { get; set; }
public string Name { get; set; }
}
public class UserDto
{
public int ID { get; set; }
public string Name { get; set; }
}
然后再创建一个标志接口IProfile
internal interface IProfile
{
}
接下来创建一个类来继承AutoMapper的Profile类与实现刚才创建的标志接口IProfile,并且在构造函数中配置关系映射
public class MyProfile: Profile,IProfile
{
public MyProfile()
{
CreateMap<User, UserDto>();
CreateMap<UserDto, User>();
} }
然后再创建一个类来注册关系映射
public class Mappings
{
public static void RegisterMappings()
{
//获取所有IProfile实现类
var allType =
Assembly
.GetEntryAssembly()//获取默认程序集
.GetReferencedAssemblies()//获取所有引用程序集
.Select(Assembly.Load)
.SelectMany(y => y.DefinedTypes)
.Where(type => typeof(IProfile).GetTypeInfo().IsAssignableFrom(type.AsType())); foreach (var typeInfo in allType)
{
var type = typeInfo.AsType();
if (type.Equals(typeof(IProfile)))
{
//注册映射
Mapper.Initialize(y =>
{
y.AddProfiles(type); // Initialise each Profile classe
});
}
}
} }
从上面代码可以看出使用标志接口来判断注册映射类进行注册映射，
最后只需在Startup类的ConfigureServices方法中添加服务和将Mappings添加到中间件即可使用
public void ConfigureServices(IServiceCollection services)
{
services.AddAutoMapper();
services.AddMvc(); }
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
Mappings.RegisterMappings();
}
然后就可以使用automapper，
public class ValuesController : Controller
{ private IMapper _mapper { get; set; }
public ValuesController([FromServices]IMapper mapper)
{
this._mapper = mapper;
} // GET api/values
[HttpGet]
public UserDto Get()
{
User user = new User()
{
ID = ,
Name = "狗娃"
};
var dto = Mapper.Map<User, UserDto>(user);
return dto;
}
}
因为core使用DI创建对象,所以只需添加构造函数即可。