如果要将源值投影到与源结构不完全匹配的目标中，则必须指定自定义成员映射定义。

    1. public class CalendarEvent
    2. {
    3.     public DateTime Date { get; set; }
    4.     public string Title { get; set; }
    5. }
    7. public class CalendarEventForm
    8. {
    9.     public DateTime EventDate { get; set; }
    10.     public int EventHour { get; set; }
    11.     public int EventMinute { get; set; }
    12.     public string Title { get; set; }
    13. }
    16. var calendarEvent = new CalendarEvent
    17. {
    18.     Date = new DateTime(2008, 12, 15, 20, 30, 0),
    19.     Title = "Company Holiday Party"
    20. };
    22. // Configure AutoMapper
    23. var configuration = new MapperConfiguration(cfg =>
    24.   cfg.CreateMap<CalendarEvent, CalendarEventForm>()
    25.     .ForMember(dest => dest.EventDate, opt => opt.MapFrom(src => src.Date.Date))
    26.     .ForMember(dest => dest.EventHour, opt => opt.MapFrom(src => src.Date.Hour))
    27.     .ForMember(dest => dest.EventMinute, opt => opt.MapFrom(src => src.Date.Minute)));
    29. // Perform mapping
    30. CalendarEventForm form = mapper.Map<CalendarEvent, CalendarEventForm>(calendarEvent);
    32. form.EventDate.ShouldEqual(new DateTime(2008, 12, 15));
    33. form.EventHour.ShouldEqual(20);
    34. form.EventMinute.ShouldEqual(30);
    35. form.Title.ShouldEqual("Company Holiday Party");