In Part 4 we will see how we can use projection to map inner objects for example a DateTime field.
Again our domain and Dto (Data Transfer Object) looks like
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//Order public class Order { public string OrderNo { get; set; } public Customer Customer { get; set; } public DateTime PurchaseDate { get; set; } public IEnumerable<OrderItems> LineItems { get; set; } public bool ShipToHomeAddress { get; set; } public decimal GetTotal() { return LineItems == null ? 0 : LineItems.Sum(x => x.GetTotalPrice()); } public Guid InternalId { get; set; } } //Dto public class OrderDateDto { public int PurchaseHour { get; set; } public int PurchaseMinute { get; set; } public string CustomerName { get; set; } } |
We will map the PurchaseDate in the Domain Object to our Dto PurchaseHour and Purchase Minute.
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public ActionResult OrderDate() { var order = _respository.Get(3); order.PurchaseDate = new DateTime(2011, 3, 15, 20, 30, 0); Mapper.CreateMap<Order, OrderDateDto>() .ForMember(dest => dest.PurchaseHour, opt => opt.MapFrom(src => src.PurchaseDate.Hour)) .ForMember(dest => dest.PurchaseMinute, opt => opt.MapFrom(src => src.PurchaseDate.Minute)); var model = Mapper.Map<Order, OrderDateDto>(order); return View(model); } //View <h2>OrderDate</h2> @Model.CustomerName @Model.PurchaseHour @Model.PurchaseMinute |
As you can see the View now contains the flatten Hour and Minute, from our previous posting we also see that the other way of nested projection/flattening is by CustomerName.
Here is how our view would display
In part 5, I will show how to use CustomerResolver to resolve and map values to different types.
Previous Post:
Part 1 (NullSubsitution)
Part 2 (Flattening by Convention)
Part 3 (Nested Mapping)
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Hi, thank you again for your tutorial
I am facing this case
AutoMapper.Mapper.CreateMap()
.ForMember(dest => dest.UserName, src => src.MapFrom(s => s.UserName))
.ForMember(dest => dest.Age, src => src.MapFrom(s => s.Age));
.ForMember(dest => dest.Preference, src => src.MapFrom(s => new ProfilePreferenceViewData{ Language = s.language, TimeZone = s.TimeZone }))
I am wondering how to use an external mapping like this
AutoMapper.Mapper.CreateMap()
.ForMember(dest => dest.Language, src => src.MapFrom(s => s.Language))
.ForMember(dest => dest.TimeZone, src => src.MapFrom(s => s.TimeZone));
And modify the original mapping so to have
AutoMapper.Mapper.CreateMap()
.ForMember(dest => dest.UserName, src => src.MapFrom(s => s.UserName))
.ForMember(dest => dest.Age, src => src.MapFrom(s => s.Age));
.ForMember(dest => dest.Preference, src => src.MapFrom(What I created)
Hope it is clear
Funny thing is if you look at my Part 5 of this series by using a CustomResolver you can very well get that working. Just create a ValueResolver like something ValueResolver < YourType, ProfilePreferenceViewData >
http://taswar.zeytinsoft.com/2011/03/11/automapper-mapping-objects-part-5-of-7-customresolver/
I should have waited for your next tutorial…
Thank you.
I will give it a deep look