Asp.net mvc 3 AutoMapper投影-日期/时间

我的实体中有一个DateTime字段，它需要映射到ViewModel中日期和时间的两个单独字段，即

// Entity
  public partial class Event
    {
        public Int64 Id { get; set; }
        public String Title { get; set; }
        public DateTime StartDateTime { get; set; }
        public DateTime EndDateTime { get; set; }
    }

// ViewModel
public class EventAddEditViewModel
    {
        public Int64 Id { get; set; }
        public String Title { get; set; }
        public String StartDate { get; set; }
        public String EndDate { get; set; }
        public String StartTime { get; set; }
        public String EndTime { get; set; }
    }

查看，我有以下映射：

    Mapper.CreateMap<Event, EventAddEditViewModel>()
            .ForMember(dest => dest.StartDate, opt => opt.MapFrom(src => src.StartDateTime.Date))
            .ForMember(dest => dest.StartTime, opt => opt.MapFrom(src => src.StartDateTime.TimeOfDay))
            .ForMember(dest => dest.EndDate, opt => opt.MapFrom(src => src.EndDateTime.Date))
            .ForMember(dest => dest.EndTime, opt => opt.MapFrom(src => src.EndDateTime.TimeOfDay));

Mapper.CreateMap（）
.ForMember（dest=>dest.StartDate，opt=>opt.MapFrom（src=>src.StartDateTime.Date））
.ForMember（dest=>dest.StartTime，opt=>opt.MapFrom（src=>src.StartDateTime.TimeOfDay））
.ForMember（dest=>dest.EndDate，opt=>opt.MapFrom（src=>src.EndDateTime.Date））
.ForMember（dest=>dest.EndTime，opt=>opt.MapFrom（src=>src.EndDateTime.TimeOfDay））；

---

这很好。但是，如何反转映射，即Mapper.CreateMap（），以便在发布表单时也映射

我做了一些与您类似的事情，但是我在ViewModel上启动了DateTime作为DateTime属性，并且有两个小时和分钟的int属性 e、 g

这意味着我可以这样做映射

Mapper.CreateMap<Event, EventAddEditViewModel>()
    .ForMember(dest => dest.StartDate, opt => opt.MapFrom(src => src.StartDateTime.Date))
    .ForMember(dest => dest.StartHour, opt => opt.MapFrom(src => src.StartDateTime.Hour))
    .ForMember(dest => dest.StartMinute, opt => opt.MapFrom(src => src.StartDateTime.Minute))
    .ForMember(dest => dest.EndDate, opt => opt.MapFrom(src => src.StartDateTime.Date))
    .ForMember(dest => dest.EndHour, opt => opt.MapFrom(src => src.EndDateTime.Hour))
    .ForMember(dest => dest.EndMinute, opt => opt.MapFrom(src => src.StartDateTime.Minute));

Mapper.CreateMap<EventAddEditViewModel, Event>()
    .ForMember(dest => dest.StartDateTime, opt => opt.MapFrom(src => new DateTime(src.StartDate.Year, src.StartDate.Month, src.StartDate.Day, src.StartHour, src.StartMinute, 0)))
    .ForMember(dest => dest.EndDateTime, opt => opt.MapFrom(src => new DateTime(src.EndDate.Year, src.EndDate.Month, src.EndDate.Day, src.EndHour, src.EndMinute, 0)));

Mapper.CreateMap（）
.ForMember（dest=>dest.StartDate，opt=>opt.MapFrom（src=>src.StartDateTime.Date））
.ForMember（dest=>dest.StartHour，opt=>opt.MapFrom（src=>src.StartDateTime.Hour））
.FormMember（dest=>dest.StartMinute，opt=>opt.MapFrom（src=>src.StartDateTime.Minute））
.FormMember（dest=>dest.EndDate，opt=>opt.MapFrom（src=>src.StartDateTime.Date））
.ForMember（dest=>dest.EndHour，opt=>opt.MapFrom（src=>src.EndDateTime.Hour））
.ForMember（dest=>dest.EndMinute，opt=>opt.MapFrom（src=>src.StartDateTime.Minute））；
Mapper.CreateMap（）
.ForMember（dest=>dest.StartDateTime，opt=>opt.MapFrom（src=>newdatetime（src.StartDate.Year，src.StartDate.Month，src.StartDate.Day，src.StartHour，src.StartMinute，0）））
.ForMember（dest=>dest.EndDateTime，opt=>opt.MapFrom（src=>newdatetime（src.EndDate.Year，src.EndDate.Month，src.EndDate.Day，src.EndHour，src.EndMinute，0））；

您应该考虑沿着这些行更改视图模型属性，因为整数将更容易处理，但是如果它们必须是字符串，则需要从字符串中解析出DATETIME对象。根据字符串的格式，可以使用这些行

Mapper.CreateMap<EventAddEditViewModel, Event>()
    .ForMember(dest => dest.StartDateTime, opt => opt.MapFrom(src => DateTime.Parse( src.StartDate + " " + src.StartTime)))
    .ForMember(dest => dest.EndDateTime, opt => opt.MapFrom(src => DateTime.Parse(src.EndDate + " " + src.EndTime)));

Mapper.CreateMap（）
.ForMember（dest=>dest.StartDateTime，opt=>opt.MapFrom（src=>DateTime.Parse（src.StartDate+“”+src.StartTime）））
.ForMember（dest=>dest.EndDateTime，opt=>opt.MapFrom（src=>DateTime.Parse（src.EndDate+“”+src.EndTime））；

@StanK，对于这种情况，我有更简单的映射语法：

Mapper.CreateMap（）
.ForMember（dest=>dest.StartDateTime，opt=>opt.MapFrom（src=>src.StartDate.Add（src.StartTime.TimeOfDay）））
.ForMember（dest=>dest.EndDateTime，opt=>opt.MapFrom（src=>src.EndDate.Add（src.EndTime.TimeOfDay））；

谢谢！我想把hour:min放在ViewModel中，这样用户就更容易输入/选择时间（类似于谷歌日历）。

Mapper.CreateMap<EventAddEditViewModel, Event>()
    .ForMember(dest => dest.StartDateTime, opt => opt.MapFrom(src => DateTime.Parse( src.StartDate + " " + src.StartTime)))
    .ForMember(dest => dest.EndDateTime, opt => opt.MapFrom(src => DateTime.Parse(src.EndDate + " " + src.EndTime)));

Mapper.CreateMap<EventAddEditViewModel, Event>()
    .ForMember(dest => dest.StartDateTime, opt => opt.MapFrom(src => src.StartDate.Add(src.StartTime.TimeOfDay)))
    .ForMember(dest => dest.EndDateTime, opt => opt.MapFrom(src => src.EndDate.Add(src.EndTime.TimeOfDay)));