如何在ASP.NET Core中设置Automapper

我想到了！详细信息如下：

1. 通过NuGet将主要的AutoMapper软件包添加到您的解决方案中。

2. 通过NuGet将AutoMapper依赖项注入程序包添加到您的解决方案中。

3. 为映射配置文件创建一个新类。（我在主解决方案目录中创建了一个名为的类，

   MappingProfile.cs

   并添加了以下代码。）我将使用

   User

   and

   UserDto

   对象作为示例。

   public class MappingProfile : Profile {public MappingProfile() {    // Add as many of these lines as you need to map your objects    CreateMap<User, UserDto>();    CreateMap<UserDto, User>();}

   }

4. 然后在

   Startup.cs

   如下所示添加AutoMapperConfiguration ：

   public void ConfigureServices(IServiceCollection services) {// .... Ignore pre before this

   // Auto Mapper Configurations
   var mappingConfig = new MapperConfiguration(mc =>
   {
   mc.AddProfile(new MappingProfile());
   });
   
   

   IMapper mapper = mappingConfig.CreateMapper();services.AddSingleton(mapper);services.AddMvc();

   }

5. 要在代码中调用映射的对象，请执行以下操作：

   public class UserController : Controller {// Create a field to store the mapper objectprivate readonly IMapper _mapper;// Assign the object in the constructor for dependency injectionpublic UserController(IMapper mapper) {    _mapper = mapper;}public async Task<IActionResult> Edit(string id) {    // Instantiate source object    // (Get it from the database or whatever your pre calls for)    var user = await _context.Users        .SingleOrDefaultAsync(u => u.Id == id);    // Instantiate the mapped data transfer object    // using the mapper you stored in the private field.    // The type of the source object is the first type argument    // and the type of the destination is the second.    // Pass the source object you just instantiated above    // as the argument to the _mapper.Map<>() method.    var model = _mapper.Map<UserDto>(user);    // .... Do whatever you want after that!}

   }

我希望这可以帮助某人从ASP.NET Core重新开始！我欢迎任何反馈或批评，因为我还是.NET世界的新手！