Automappermappingexception: 'Error Mapping types. '

Question

Could you help me with this mistake described in the title, please. I am using the Automapper in the same way in other classes and only in those classes is it making this mistake. I couldn’t understand why of the error, since the Helpmodel and Helpviewmodel classes have equal properties. Automapper version is 7.0.1.

Helpmodel:

public class HelpModel
{
    public int Id { get; private set; }

    public string Area { get; private set; }

    public string Controller { get; private set; }

    public string Action { get; private set; }

    public string Template { get; private set; }




    public HelpModel()
    {
    }
}

Helpviewmodel:

public class HelpViewModel : BaseViewModel
{


    public int Id { get; set; }


    [Required(ErrorMessage = "Informe a {0} referente a Help")]
    [Display(Name = "Área")]
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Area { get; set; }

    [Required(ErrorMessage = "Informe o {0} referente a Help")]
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Controller { get; set; }

    [Required(ErrorMessage = "Informe a {0} referente a Help")]
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Action { get; set; }

    [Required(ErrorMessage = "Preencha o {0} referente a Help")]
    [DisplayFormat(ConvertEmptyStringToNull = false)]
    public string Template { get; set; }


    public HelpViewModel()
    {

    }
}

Where I use the Automapper:

 public List<HelpViewModel> Listar()
    {
        List<HelpModel> lstHelpModel = _helpRepository.List();

        List<HelpViewModel> lstHelpViewModel = Mapper.Map<List<HelpViewModel>>(lstHelpModel);

        return lstHelpViewModel;
    }

There must be something wrong I couldn’t figure out. Thanks.

Answer 1

This statement was missing in the Map boot class:

config.CreateMap<HelpModel, HelpViewModel>();