7.投影

AutoMapper有一種自定義映射，叫投影。接下來我們通過一個示例來了解它

7.1示例

//源對象 public class CalendarEvent {public DateTime Date { get; set; }public string Title { get; set; } }//目標對象 public class CalendarEventForm {public DateTime EventDate { get; set; }public int EventHour { get; set; }public int EventMinute { get; set; }public string Title { get; set; } }

映射說明：把日期拆開分別映射到不同字段

CalendarEvent中屬性說明CalendarEventForm的屬性

Date	Date中的年月日->	EventDate
Date	Date中小時->	EventHour
Date	Date中分鐘->	EventMinute

---

[TestClass] public class Projection {[TestMethod]public void ProjectionTest(){var calendarEvent = new CalendarEvent{Date = new DateTime(2008, 12, 15, 20, 30, 0),Title = "Company Holiday Party"};// 初始化映射Mapper.Initialize(cfg =>cfg.CreateMap<CalendarEvent, CalendarEventForm>().ForMember(dest => dest.EventDate, opt => opt.MapFrom(src => src.Date.Date)).ForMember(dest => dest.EventHour, opt => opt.MapFrom(src => src.Date.Hour)).ForMember(dest => dest.EventMinute, opt => opt.MapFrom(src => src.Date.Minute)));CalendarEventForm form = Mapper.Map<CalendarEvent, CalendarEventForm>(calendarEvent);Assert.AreEqual(new DateTime(2008, 12, 15), form.EventDate); // 通過Assert.AreEqual(20, form.EventHour);// 通過Assert.AreEqual(30, form.EventMinute);// 通過Assert.AreEqual("Company Holiday Party", form.Title);// 通過} }

轉載于:https://www.cnblogs.com/wuyunblog/p/6662386.html

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