使用Automapper

Question

我正在使用代码优先迁移来创建实体。我的实体看起来像这样：

public class User
{
    private string userWholeName = string.Empty;
    private ICollection<UsersInRoles> usersInRoles;
    public User()
    {
        this.UserId = Guid.NewGuid();
        this.usersInRoles = new System.Collections.Generic.HashSet<UsersInRoles>();
    }

    [Key]
    public Guid UserId { get; set; }

    //TODO: check for resource names and for all models
    [Required(AllowEmptyStrings = false, ErrorMessage = null)]
    public string UserName { get; set; }

    [Required(AllowEmptyStrings = false)]
    [MaxLength(30)]
    public string Password { get; set; }

    public virtual ICollection<UsersInRoles> UsersInRoles
    {
        get { return this.usersInRoles; }
        set { this.usersInRoles = value; }
    }
}

我的UsersInRolesClass：

public class UsersInRoles
{
    public UsersInRoles()
    {
    }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int UsersInRolesId { get; set; }

    public Guid UserId { get; set; }
    public int RoleId { get; set; }

    public virtual Role Role { get; set; }
    public virtual User User { get; set; }
}

我的角色课程：

public class Role : Interfaces.IRole
{
    private ICollection<UsersInRoles> usersInRoles;

    public Role()
    {
        this.usersInRoles = new HashSet<UsersInRoles>();
    }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int RoleId { get; set; }

    [Required]
    public string RoleName { get; set; }

    public string RoleDescription { get; set; }

    public virtual ICollection<UsersInRoles> UsersInRoles
    {
        get
        {
            return this.usersInRoles;
        }
        set
        {
            this.usersInRoles = value;
        }
    }
}

所以这些是我的数据库实体。我试图将它们映射到：

 public class UserDTO
    {

       //other properties same as in User entity

        IList<RoleDTO> Roles { get; set; }
    }

public class RoleDTO
    {
         int RoleId { get; set; }

         string RoleName { get; set; }
    }

每个属性都已映射，但角色不是。我正在尝试这个：

Mapper.Initialize(cfg => cfg.CreateMap<UserDTO, User>().ForMember(dest => dest.UsersInRoles, opt => opt.ResolveUsing(c=>c.Roles.Select(f=>new UsersInRoles() { Role = new Role() { RoleId = f.RoleId,RoleName = f.RoleName}, RoleId = f.RoleId,UserId = c.UserId }))));

任何想法？