using System;

using AutoMapper;

​

namespace AutomapperSample

{

    public class Task

    {

        public Guid? StatusId { get; set; }

        public Status Status { get; set; }

        public DateTime? StatusLastModified { get; set; }

    }

​

    public class Status

    {

        public string Name { get; set; }

    }

​

    public struct TaskDto

    {

        public TaskStatusDto? Status { get; set; }

    }

​

    public struct TaskStatusDto

    {

        public DateTime Timestamp { get; set; } // maps from Task.StatusLastModified 

        public StatusDto Status { get; set; } // maps from Task.Status

    }

​

    public struct StatusDto

    {

        public string Name { get; set; }

    }

    public class TaskStatusDtoResolver : IValueResolver<Task, TaskDto, TaskStatusDto?>

    {

        public TaskStatusDto? Resolve(Task source, TaskDto destination, TaskStatusDto? member, ResolutionContext context)

        {

            if (source.Status == null)

            {

                return null;

            }

​

            return new TaskStatusDto

            {

                Status = context.Mapper.Map<StatusDto>(source.Status),

                Timestamp = source.StatusLastModified == null ? DateTime.Now : source.StatusLastModified.Value

                // I am using DateTime.Now as the default value for null

            };

        }

    }

}