AutoMapper 从其 Parent 属性映射一个集合属性值

Question

我有两个模型，Receipt.cs 和 ReceiptProduct.cs。我想要实现的是从其父 Receipt 映射 ICollection ReceiptProducts 字段，如 PurchaseOrderId 和 ReceiptId。

Receipt.cs

public class Receipt
    {
        public Guid Id { get; set; }
        public string Reference { get; set; }
        public string PurchaseOrderId { get; set; }
        public virtual ICollection<ReceiptProduct> ReceiptProducts { get; set; }
    }

ReceiptProduct.cs

public class ReceiptProduct
    {
        public Guid Id { get; set; }
        public string ReceiptId { get; set; }
        public string PurchaseOrderId { get; set; }
        public string ProductName { get; set; }
        public string ProductId { get; set; }
        public string Note { get; set; }
    }

• ReceiptProducts.ReceiptId

• ReceiptProducts.PurchaseOrderId

我尝试了以下代码。但我得到了错误

CreateMap<DataEntities.Receipt, BusinessEntities.Receipt>()
 .ForMember(dest => dest.ReceiptProducts.Select(x=>x.ReceiptId), automapper => automapper.MapFrom(src => src.Id));

错误： AutoMapper.AutoMapperConfigurationException: Custom configuration for members is only supported for top-level individual members on a type.

那么如何映射该集合属性值。

Answer 1

试试这个。

public class ReceiptProduct
{
    public Guid Id { get; set; }
    public string ReceiptId { get; set; }
    public string PurchaseOrderId { get; set; }
    public string ProductName { get; set; }
    public string ProductId { get; set; }
    public string Note { get; set; }

    **public Receipt Receipt { get; set; }**

}

映射

CreateMap<DataEntities.ReceiptProduct, BusinessEntities.Receipt>()
.ForMember(dest => x=>x.ReceiptId, opts => opts.MapFrom(src => src.Receipt.Id))
.ForMember(dest => x=>x.PurchaseOrderId , opts => opts.MapFrom(src => src.Receipt.PurchaseOrderId))
.ForMember(dest => x=>x.Reference , opts => opts.MapFrom(src => src.Receipt.Reference ));