自动映射器返回null

Question

I've the abstract class AbsProduct

public abstract class AbsProduct
{
    [Key]
    public int ID { get; set; }
    public int Price { get; set; }
    public int Category { get; set; }
    public string Name { get; set; }

    public abstract double Accept(IProductVisitor visitor);

}

and the ProductDTO :

public class ProductDTO
{
    public int ID { get; set; }
    public int Price { get; set; }
    public int Category { get; set; }
    public string Name { get; set; }
}

My configuration is

AutoMapper.Mapper.Initialize(config =>
{
    config.CreateMap<AbsProduct, ProductDTO>();
    config.CreateMap<ProductDTO, AbsProduct>();
});

The problem is when I try to map ProductDTO to AbsProduct :

var product = AutoMapper.Mapper.Map<ProductDTO, AbsProduct>(productDTO);

AutoMapper is returning null , but the source( productDTO ) isn't null .

Answer 1

You can't instantiate an abstract class.

Try create a type that derives from AbsProduct and use that type instead of it.