我在我的项目中使用 Automapper 5.2.0。当我在代码中使用 ProjectTo()
时出现此错误:
Mapper not initialized. Call Initialize with Appropriate configuration. If you are trying to use mapper instances through a container or otherwise, make sure you do not have any calls to the static Mapper.Map methods, and if you're using ProjectTo or UseAsDataSource extension methods, make sure you pass in the appropriate IConfigurationProvider instance.
服务代码
public async Task<FreelancerProfileViewModel> GetFreelancerProfile()
{
var id = Guid.Parse(_identity.GetUserId());
var model = await _freelancerProfiles
.AsNoTracking()
.Where(_ => _.User.Id == id)
.ProjectTo<FreelancerProfileViewModel>()
.FirstAsync();
// var viewmodel = _mapper.Map<FreelancerProfileViewModel>(model);
return model;
}
Automapper 配置文件
public class FreelancerDashbordProfile : Profile
{
private readonly IIdentity _identity;
public FreelancerDashbordProfile(IIdentity identity)
{
_identity = identity;
var id = Guid.Parse(_identity.GetUserId());
CreateMap<FreelancerProfile, FreelancerProfileViewModel>()
.ForMember(_ => _.DoingProjectCount,
__ => __.MapFrom(_ => _.Projects.Count(project => project.ProjectState == ProjectState.Doing)))
.ForMember(_ => _.EndProjectCount,
__ => __.MapFrom(_ => _.Projects.Count(project => project.ProjectState == ProjectState.End)))
.ForMember(_ => _.ProjectCount, __ => __.MapFrom(_ => _.Projects.Count));
}
}
我也用StructureMap对于 IoC
AutoMapperRegistery
public AutoMapperRegistery()
{
this.Scan(scan =>
{
scan.TheCallingAssembly();
scan.AssemblyContainingType<SkillProfile>(); // for other asms, if any.
scan.WithDefaultConventions();
scan.AddAllTypesOf<Profile>().NameBy(item => item.FullName);
});
this.For<MapperConfiguration>().Singleton().Use("MapperConfig", ctx =>
{
var config = new MapperConfiguration(cfg =>
{
cfg.CreateMissingTypeMaps = true; // It will connect `Person` & `PersonViewModel` automatically.
addAllCustomAutoMapperProfiles(ctx, cfg);
});
config.AssertConfigurationIsValid();
return config;
});
this.For<IMapper>()
.Singleton()
.Use(ctx => ctx.GetInstance<MapperConfiguration>().CreateMapper(ctx.GetInstance));
}
最佳答案
您需要将 MappingConfiguration 提供程序传递给 ProjectTo 调用。
public async Task<FreelancerProfileViewModel> GetFreelancerProfile()
{
var id = Guid.Parse(_identity.GetUserId());
var model = await _freelancerProfiles
.AsNoTracking()
.Where(_ => _.User.Id == id)
.ProjectTo<FreelancerProfileViewModel>(_mapper.Configuration)
.FirstAsync();
// var viewmodel = _mapper.Map<FreelancerProfileViewModel>(model);
return model;
}
关于c# - 映射器未初始化,使用 ProjectTo() 时,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41961439/