C# Automapper: Nullable Boolean Not working for different Class member names

Question

Automapper is not mapping correctly between two boolean nullable members, with different names. This Always results in Null in the destination. How can this be resolved?

CreateMap<{Product, ProductDto>()
     .ForMember(dest => dest.ProductStatus, opt => opt.MapFrom(src => src.Status))
     .ReverseMap();

Being called like this,

var productList = _mapper.Map<IEnumerable<ProductDto>, IEnumerable<Product>>(productDtoList);


public class ProductDto
{
    public int ProductId{ get; set; }
    public string ProductName{ get; set; }
    public bool? ProductStatus { get; set; }
} 

public class Product
{
    public int ProductId { get; set; }
    public string ProductName { get; set; }
    public bool? Status { get; set; }
} 

Update: It seems to be working though, when I name both ProductDto and Product as Status , instead of ProductStatus on ProductDto

Currently using Net Core 3.1

Answer 1

I created a quick console app and everything worked as expected, so I'm not sure what the problem is. Make sure your configuration is actually being applied to your _mapper . I can only guess that might be the problem.

class Program
{
    static void Main(string[] args)
    {
        var configuration = new MapperConfiguration(cfg => cfg
            .CreateMap<Product, ProductDto>()
            .ForMember(dest => dest.ProductStatus, opt => opt.MapFrom(src => src.Status))
            .ReverseMap()
        );

        var mapper = new Mapper(configuration);

        var productDtoList = new List<ProductDto>
        {
            new ProductDto { ProductId = 0, ProductName = "Product 1", ProductStatus = false },
            new ProductDto { ProductId = 1, ProductName = "Product 2", ProductStatus = true },
            new ProductDto { ProductId = 2, ProductName = "Product 3", ProductStatus = null },
        };

        var productList = mapper.Map<List<Product>>(productDtoList);

        foreach(var product in productList)
        {
            Console.WriteLine($"{product.ProductId}\t{product.ProductName}\t{product.Status}");
            // Output
            // 0    Product 1   False
            // 1    Product 2   True
            // 2    Product 3   
        }
    }
}

public class ProductDto
{
    public int ProductId { get; set; }
    public string ProductName { get; set; }
    public bool? ProductStatus { get; set; }
}

public class Product
{
    public int ProductId { get; set; }
    public string ProductName { get; set; }
    public bool? Status { get; set; }
}