Question

现在一直在努力争取这一天无济于事。我是Automapper的新手，我正在尝试使用viewModel映射EF域对象，但是我收到以下异常：

Missing type map configuration or unsupported mapping.\r\n\r\nMapping types:\r\nCatalogueDefinitionFile -> CatalogueDefinitionFileViewModel\r\nDigital.PriceBuilder.Core.Domain.CatalogueDefinitionFile -> Digital.PriceBuilder.Web.Models.CatalogueDefinitionFileViewModel"}

CatalogueDefinitionFile的域POCO是：

public class CatalogueDefinitionFile : BaseEntity
{
    public CatalogueDefinitionFile()
    {
        this.ProductDefinitions = new List<ProductDefinition>();            
    }

    public string TargetApplication { get; set; }

    public virtual IList<ProductDefinition> ProductDefinitions { get; set; }

}

基础实体：

public abstract class BaseEntity
{
    public BaseEntity()
    {
        this.CreatedDate = DateTime.Now;
        this.UpdatedDate = DateTime.Now;
        this.IsActive = true;
    }

    public int Id { get; set; }

    public string Name { get; set; }

    public bool IsActive { get; set; }

    public DateTime CreatedDate { get; set; }

    public string CreatedBy { get; set; }

    public DateTime UpdatedDate { get; set; }

    public string UpdatedBy { get; set; }
}

我创建了个人资料：

public class DomainToViewModelMappingProfile : Profile
{
    public override string ProfileName
    {
        get
        {
            return "DomainToViewModelMappings";
        }
    }

    public DomainToViewModelMappingProfile()
    {
        ConfigureMappings();
    }


    /// <summary>
    /// Creates a mapping between source (Domain) and destination (ViewModel)
    /// </summary>
    private void ConfigureMappings()
    {
        var config = new MapperConfiguration(cfg => {
            cfg.CreateMap<ProductDefinition, ProductDefinitionViewModel>().ReverseMap();
            cfg.CreateMap<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>().ReverseMap();

        });

        IMapper mapper = config.CreateMapper();

        mapper.Map<ProductDefinition, ProductDefinitionViewModel>(new ProductDefinition());
        mapper.Map<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>(new CatalogueDefinitionFile());


    }
}

Profile是AutoMapperConfiguration类中的引用，然后在Global.asax中引用：

public class AutoMapperConfiguration
{
    public static void Configure()
    {
        // Create Automapper profiles
        Mapper.Initialize(m =>
        {
            m.AddProfile<DomainToViewModelMappingProfile>();
            m.AddProfile<ViewModelToDomainMappingProfile>();
        });
    }
}

viewModel如下所示：

public class CatalogueDefinitionFileViewModel
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string TargetApplication { get; set; }

    public bool IsActive { get; set; }

    public DateTime CreatedDate { get; set; }

    public string CreatedBy { get; set; }

    public DateTime UpdatedDate { get; set; }

    public string UpdatedBy { get; set; }

    public virtual IList<ProductDefinition> ProductDefinitions { get; set; }
}

然后在我的控制器中我有这个：

public ActionResult Index()
    {
        IEnumerable<CatalogueDefinitionFileViewModel> viewModel = null;
        IEnumerable<CatalogueDefinitionFile> files;

        files = _catalogueDefinitionFileService.GetCatalogueDefinitionFiles();

        viewModel = Mapper.Map<IEnumerable<CatalogueDefinitionFile>, IEnumerable<CatalogueDefinitionFileViewModel>>(files);

        return View(viewModel);
    }

抛出异常

viewModel = Mapper.Map<IEnumerable<CatalogueDefinitionFile>, IEnumerable<CatalogueDefinitionFileViewModel>>(files);

有人可以帮我理解为什么会这样吗？

提前致谢。

Answer 1

您的个人资料无法执行任何操作：

public class DomainToViewModelMappingProfile : Profile
{
// etc ...
    private void ConfigureMappings()
    {
        // You are just creating a local mapper config/instance here and then discarding it when it goes out of scope...
        var config = new MapperConfiguration(cfg => {
            cfg.CreateMap<ProductDefinition, ProductDefinitionViewModel>().ReverseMap();
            cfg.CreateMap<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>().ReverseMap();    
        });

        // I assume this is just test code
        IMapper mapper = config.CreateMapper();    
        mapper.Map<ProductDefinition, ProductDefinitionViewModel>(new ProductDefinition());
        mapper.Map<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>(new CatalogueDefinitionFile());  
    }
}

试试这个：

public class DomainToViewModelMappingProfile : Profile
{
    public override string ProfileName
    {
        get
        {
            return "DomainToViewModelMappings";
        }
    }

    public DomainToViewModelMappingProfile()
    {
        ConfigureMappings();
    }


    /// <summary>
    /// Creates a mapping between source (Domain) and destination (ViewModel)
    /// </summary>
    private void ConfigureMappings()
    {
        CreateMap<ProductDefinition, ProductDefinitionViewModel>().ReverseMap();
        CreateMap<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>().ReverseMap();
    }
}

您继承的Profile类型可能与地图配置对象有关（因此具有相似/相同的本地方法）。

免责声明：我暂时没有使用Automapper，但上述情况似乎是您的问题。

Answer 2

我刚刚测试过，一切正常。以下映射传递 -

        Mapper.CreateMap<CatalogueDefinitionFile, CatalogueDefinitionFileViewModel>();

        var obj = Mapper.Map<IEnumerable<CatalogueDefinitionFileViewModel>>(new List<CatalogueDefinitionFile>{
            new CatalogueDefinitionFile
        {
            Id = 101,
            Name = "test",
            TargetApplication = "test",
            IsActive = false,
            CreatedBy = "test",
            CreatedDate = DateTime.Now,
            UpdatedBy = "test",
            UpdatedDate = DateTime.Now,
            ProductDefinitions = new List<ProductDefinition> { new ProductDefinition { MyProperty = 100 } }}
        });

自动映射 - 缺少类型映射配置或不支持的映射

2 个答案: